欢迎访问ic37.com |
会员登录 免费注册
发布采购
所在地: 型号: 精确
  • 批量询价
  •  
  • 供应商
  • 型号
  • 数量
  • 厂商
  • 封装
  • 批号
  • 交易说明
  • 询价
更多
  • DAC7725UB/1KG4图
  • 深圳市宏世佳电子科技有限公司

     该会员已使用本站13年以上
  • DAC7725UB/1KG4 现货库存
  • 数量3725 
  • 厂家TI 
  • 封装SOIC-28 
  • 批号2023+ 
  • 全新原厂原装产品、公司现货销售
  • QQ:2881894393QQ:2881894393 复制
    QQ:2881894392QQ:2881894392 复制
  • 0755- QQ:2881894393QQ:2881894392
  • DAC7725UB【特价现货】图
  • 齐创科技(上海北京青岛)有限公司

     该会员已使用本站14年以上
  • DAC7725UB【特价现货】 现货库存
  • 数量7600 
  • 厂家TI代理 
  • 封装28SOIC 
  • 批号24+热销 
  • 中国区代理全新热卖原装正品
  • QQ:2394092314QQ:2394092314 复制
    QQ:792179102QQ:792179102 复制
  • 021-62153656 QQ:2394092314QQ:792179102
  • DAC7725UB图
  • 深圳市能元时代电子有限公司

     该会员已使用本站10年以上
  • DAC7725UB 现货库存
  • 数量92000 
  • 厂家TI/德州仪器 
  • 封装SOIC28 
  • 批号24+ 
  • 原装现货假一罚十!可含税长期供货
  • QQ:2885637848QQ:2885637848 复制
    QQ:2885658492QQ:2885658492 复制
  • 0755-84502810 QQ:2885637848QQ:2885658492
  • DAC7725UB图
  • 深圳市欧立现代科技有限公司

     该会员已使用本站12年以上
  • DAC7725UB 现货库存
  • 数量4000 
  • 厂家TI/BB 
  • 封装SOP-28 
  • 批号24+ 
  • 全新原装现货,欢迎询购!
  • QQ:1950791264QQ:1950791264 复制
    QQ:2216987084QQ:2216987084 复制
  • 0755-83222787 QQ:1950791264QQ:2216987084
  • DAC7725UB图
  • 深圳市芯脉实业有限公司

     该会员已使用本站11年以上
  • DAC7725UB 现货库存
  • 数量20 
  • 厂家TI 
  • 封装SOIC (DW) 
  • 批号新批次 
  • 新到现货、一手货源、当天发货、bom配单
  • QQ:2881512844QQ:2881512844 复制
  • 075584507705 QQ:2881512844
  • DAC7725UB图
  • 深圳市华来深电子有限公司

     该会员已使用本站13年以上
  • DAC7725UB 现货库存
  • 数量1000 
  • 厂家TI 
  • 封装SOIC28 
  • 批号20+ 
  • 受权代理!全新原装现货特价热卖!
  • QQ:1258645397QQ:1258645397 复制
    QQ:876098337QQ:876098337 复制
  • 0755-83238902 QQ:1258645397QQ:876098337
  • DAC7725UB图
  • 深圳市思诺康科技有限公司

     该会员已使用本站16年以上
  • DAC7725UB 热卖库存
  • 数量11 
  • 厂家BB 
  • 封装SOP 
  • 批号05+ 
  • 全新原装公司现货
  • QQ:2881281130QQ:2881281130 复制
    QQ:2881281133QQ:2881281133 复制
  • 0755-83286481 QQ:2881281130QQ:2881281133
  • DAC7725UB图
  • 深圳市华斯顿电子科技有限公司

     该会员已使用本站16年以上
  • DAC7725UB 热卖库存
  • 数量12500 
  • 厂家BB 
  • 封装SOP 
  • 批号2023+ 
  • 绝对原装正品现货/优势渠道商、原盘原包原盒
  • QQ:1002316308QQ:1002316308 复制
    QQ:515102657QQ:515102657 复制
  • 深圳分公司0755-83777708“进口原装正品专供” QQ:1002316308QQ:515102657
  • DAC7725UB图
  • 深圳市拓森弘电子有限公司

     该会员已使用本站1年以上
  • DAC7725UB
  • 数量5300 
  • 厂家TI(德州仪器) 
  • 封装SOIC-28 
  • 批号21+ 
  • 全新原装正品,现货库存欢迎咨询
  • QQ:1300774727QQ:1300774727 复制
  • 13714410484 QQ:1300774727
  • DAC7725UB图
  • 深圳市芯柏然科技有限公司

     该会员已使用本站7年以上
  • DAC7725UB
  • 数量23480 
  • 厂家TI 
  • 封装 
  • 批号21+ 
  • 新到现货、一手货源、当天发货、价格低于市场
  • QQ:287673858QQ:287673858 复制
  • 0755-82533534 QQ:287673858
  • DAC7725UB.图
  • 深圳市创德丰电子有限公司

     该会员已使用本站15年以上
  • DAC7725UB.
  • 数量
  • 厂家专营TI/BB 
  • 封装长期收购 
  • 批号11+ 
  • 长期收购此型号/专收TI/BB全系列
  • QQ:2851807192QQ:2851807192 复制
    QQ:2851807191QQ:2851807191 复制
  • 86-755-83226910, QQ:2851807192QQ:2851807191
  • DAC7725UB图
  • 深圳市恒意法科技有限公司

     该会员已使用本站17年以上
  • DAC7725UB
  • 数量9000 
  • 厂家Texas Instruments 
  • 封装28-SOIC 
  • 批号21+ 
  • 正规渠道/品质保证/原装正品现货
  • QQ:2881514372QQ:2881514372 复制
  • 0755-83247729 QQ:2881514372
  • DAC7725UB图
  • 深圳市晶美隆科技有限公司

     该会员已使用本站15年以上
  • DAC7725UB
  • 数量65800 
  • 厂家TI/德州仪器 
  • 封装SOP 
  • 批号24+ 
  • 假一罚十,原装进口正品现货供应,价格优势。
  • QQ:198857245QQ:198857245 复制
  • 0755-82865294 QQ:198857245
  • DAC7725UB.图
  • 深圳市集创讯科技有限公司

     该会员已使用本站5年以上
  • DAC7725UB.
  • 数量35000 
  • 厂家TI/德州仪器 
  • 封装 
  • 批号24+ 
  • 原装进口正品现货,假一罚十价格优势
  • QQ:2885393494QQ:2885393494 复制
    QQ:2885393495QQ:2885393495 复制
  • 0755-83244680 QQ:2885393494QQ:2885393495
  • DAC7725UB图
  • 集好芯城

     该会员已使用本站13年以上
  • DAC7725UB
  • 数量14992 
  • 厂家BB 
  • 封装SMD28 
  • 批号最新批次 
  • 原装原厂 现货现卖
  • QQ:3008092965QQ:3008092965 复制
    QQ:3008092965QQ:3008092965 复制
  • 0755-83239307 QQ:3008092965QQ:3008092965
  • DAC7725UB图
  • 北京力通科信电子有限公司

     该会员已使用本站10年以上
  • DAC7725UB
  • 数量1000 
  • 厂家TI 
  • 封装 28-SOIC  
  • 批号12+ 
  • 原装、刚到货、杜绝炒货
  • QQ:2355365902QQ:2355365902 复制
    QQ:2355365899QQ:2355365899 复制
  • 010-82625766 QQ:2355365902QQ:2355365899
  • DAC7725UB图
  • 深圳市华斯顿电子科技有限公司

     该会员已使用本站16年以上
  • DAC7725UB
  • 数量12500 
  • 厂家TI/德州仪器 
  • 封装SOIC-28 
  • 批号2023+ 
  • 绝对原装正品全新深圳进口现货,优质渠道供应商!
  • QQ:1002316308QQ:1002316308 复制
    QQ:515102657QQ:515102657 复制
  • 美驻深办0755-83777708“进口原装正品专供” QQ:1002316308QQ:515102657
  • DAC7725UB图
  • 深圳市和诚半导体有限公司

     该会员已使用本站11年以上
  • DAC7725UB
  • 数量5600 
  • 厂家TI 
  • 封装SOIC 
  • 批号23+ 
  • 100%深圳原装现货库存
  • QQ:2276916927QQ:2276916927 复制
    QQ:1977615742QQ:1977615742 复制
  • 18929336553 QQ:2276916927QQ:1977615742
  • DAC7725UB图
  • 深圳市思诺康科技有限公司

     该会员已使用本站16年以上
  • DAC7725UB
  • 数量1000 
  • 厂家BB 
  • 封装SOP 
  • 批号05+ 
  • 思诺康原装现货
  • QQ:2881281130QQ:2881281130 复制
    QQ:2881281133QQ:2881281133 复制
  • 0755-83286481 QQ:2881281130QQ:2881281133
  • DAC7725UB图
  • 深圳市富科达科技有限公司

     该会员已使用本站13年以上
  • DAC7725UB
  • 数量20800 
  • 厂家TI 
  • 封装SOP 
  • 批号2020+ 
  • 全新原装进口现货特价热卖,长期供货
  • QQ:1327510916QQ:1327510916 复制
    QQ:1220223788QQ:1220223788 复制
  • 0755-28767101 QQ:1327510916QQ:1220223788
  • DAC7725UB图
  • 深圳市昌和盛利电子有限公司

     该会员已使用本站11年以上
  • DAC7725UB
  • 数量16548 
  • 厂家BB 
  • 封装SOP-28 
  • 批号▊ NEW ▊ 
  • ◆★█【专注原装正品现货】★价格最低★!量大可定!欢迎惠顾!(长期高价回收全新原装正品电子元器件)
  • QQ:1551106297QQ:1551106297 复制
    QQ:3059638860QQ:3059638860 复制
  • 0755-23125986 QQ:1551106297QQ:3059638860
  • DAC7725UB图
  • 深圳市正信鑫科技有限公司

     该会员已使用本站12年以上
  • DAC7725UB
  • 数量3020 
  • 厂家TI 
  • 封装原厂封装 
  • 批号22+ 
  • 原装正品★真实库存★价格优势★欢迎来电洽谈
  • QQ:1686616797QQ:1686616797 复制
    QQ:2440138151QQ:2440138151 复制
  • 0755-22655674 QQ:1686616797QQ:2440138151
  • DAC7725UB图
  • 深圳市能元时代电子有限公司

     该会员已使用本站10年以上
  • DAC7725UB
  • 数量65300 
  • 厂家TI/BB 
  • 封装SOP 
  • 批号24+ 
  • 公司原装现货可含税!假一罚十!
  • QQ:2885637848QQ:2885637848 复制
    QQ:2885658492QQ:2885658492 复制
  • 0755-84502810 QQ:2885637848QQ:2885658492
  • DAC7725UB/1K图
  • 深圳市科庆电子有限公司

     该会员已使用本站16年以上
  • DAC7725UB/1K
  • 数量338 
  • 厂家TI 
  • 封装SOP-28 
  • 批号23+ 
  • 只做进口原装/到货/可含13%税
  • QQ:2850188252QQ:2850188252 复制
    QQ:2850188256QQ:2850188256 复制
  • 0755 QQ:2850188252QQ:2850188256
  • DAC7725UB图
  • 深圳市炎凯科技有限公司

     该会员已使用本站7年以上
  • DAC7725UB
  • 数量503 
  • 厂家TI 
  • 封装SOP28 
  • 批号24+ 
  • 原装现货
  • QQ:354696650QQ:354696650 复制
    QQ:2850471056QQ:2850471056 复制
  • 0755-89587732 QQ:354696650QQ:2850471056
  • DAC7725UB图
  • 深圳市芯鹏泰科技有限公司

     该会员已使用本站8年以上
  • DAC7725UB
  • 数量7536 
  • 厂家Texas Instruments 
  • 封装28-SOIC 
  • 批号23+ 
  • 数模转换器DAC原装现货
  • QQ:3004306594QQ:3004306594 复制
  • 0755-82777852 QQ:3004306594
  • DAC7725UB图
  • 深圳市捷立辉科技有限公司

     该会员已使用本站10年以上
  • DAC7725UB
  • 数量69896 
  • 厂家BURR-BROWN 
  • 封装SOP-28 
  • 批号21+ 
  • 绝对原装现货,公司真实库存
  • QQ:1803576909QQ:1803576909 复制
  • -0755-82792948 QQ:1803576909
  • DAC7725UB图
  • 深圳市得捷芯城科技有限公司

     该会员已使用本站11年以上
  • DAC7725UB
  • 数量3325 
  • 厂家TI/德州仪器 
  • 封装NA/ 
  • 批号23+ 
  • 原装现货,当天可交货,原型号开票
  • QQ:3007977934QQ:3007977934 复制
    QQ:3007947087QQ:3007947087 复制
  • 0755-82546830 QQ:3007977934QQ:3007947087
  • DAC7725UB/1K图
  • 北京元坤伟业科技有限公司

     该会员已使用本站17年以上
  • DAC7725UB/1K
  • 数量5000 
  • 厂家TI 
  • 封装N A 
  • 批号2024+ 
  • 百分百原装正品,现货库存
  • QQ:857273081QQ:857273081 复制
    QQ:1594462451QQ:1594462451 复制
  • 010-62104931 QQ:857273081QQ:1594462451
  • DAC7725UB图
  • 深圳市亿智腾科技有限公司

     该会员已使用本站8年以上
  • DAC7725UB
  • 数量16680 
  • 厂家TI 
  • 封装SOIC28 
  • 批号16+ 
  • 假一赔十★全新原装现货★★特价供应★工厂客户可放款
  • QQ:799387964QQ:799387964 复制
    QQ:2777237833QQ:2777237833 复制
  • 0755-82566711 QQ:799387964QQ:2777237833
  • DAC7725UB图
  • 深圳市华斯顿电子科技有限公司

     该会员已使用本站16年以上
  • DAC7725UB
  • 数量12500 
  • 厂家BB 
  • 封装SOP 
  • 批号2023+ 
  • 绝对原装正品现货/优势渠道商、原盘原包原盒
  • QQ:1002316308QQ:1002316308 复制
    QQ:515102657QQ:515102657 复制
  • 深圳分公司0755-83777708“进口原装正品专供” QQ:1002316308QQ:515102657
  • DAC7725UB图
  • 深圳市华斯顿电子科技有限公司

     该会员已使用本站16年以上
  • DAC7725UB
  • 数量12500 
  • 厂家BB 
  • 封装 
  • 批号2023+ 
  • 绝对原装全新正品现货/优势渠道商、原盘原包原盒
  • QQ:364510898QQ:364510898 复制
    QQ:515102657QQ:515102657 复制
  • 0755-83777708“进口原装正品专供” QQ:364510898QQ:515102657
  • DAC7725UB图
  • 深圳市欧瑞芯科技有限公司

     该会员已使用本站11年以上
  • DAC7725UB
  • 数量9500 
  • 厂家TI(德州仪器) 
  • 封装28-SOIC(0.295,7.50mm 宽) 
  • 批号23+/24+ 
  • 绝对原装正品,可开13%专票,欢迎采购!!!
  • QQ:3354557638QQ:3354557638 复制
    QQ:3354557638QQ:3354557638 复制
  • 18565729389 QQ:3354557638QQ:3354557638

产品型号DAC7725UB的概述

DAC7725UB芯片概述 DAC7725UB是一款高度集成的数字-模拟转换器(DAC),具有高精度输出和快速响应能力,广泛应用于工业控制、信号生成和音频设备等领域。DAC7725UB专为高性能应用设计,可实现高分辨率的模拟信号输出,能够满足客户对于精度和稳定性的严格要求。 DAC7725UB芯片的主要特点包括双通道输出、17位的分辨率以及低功耗。其整体设计的出发点是为了提高在实际应用中的灵活性和可靠性。这种芯片通常具有多种工作模式,可以根据用户的需求进行配置,支持多种接口方式与外部设备进行数据通信,提高系统的兼容性。 DAC7725UB的详细参数 DAC7725UB的规格参数如下: - 分辨率:17位 - 通道数量:2通道(双通道输出) - 最大采样频率:1MSPS(百万次每秒) - 输出范围:±10V、0-10V、0-5V可选 - 供电电压:从正电源±15V到±5V可选 - 线性度...

产品型号DAC7725UB的Datasheet PDF文件预览

®
DAC7724  
DAC7724  
DAC7725  
DAC7725  
For most current data sheet and other product  
information, visit www.burr-brown.com  
12-Bit Quad Voltage Output  
DIGITAL-TO-ANALOG CONVERTER  
FEATURES  
DESCRIPTION  
The DAC7724 and DAC7725 are 12-bit quad voltage  
output digital-to-analog converters with guaranteed  
12-bit monotonic performance over the specified tem-  
perature range. They accept 12-bit parallel input data,  
have double-buffered DAC input logic (allowing simul-  
taneous update of all DACs), and provide a readback  
mode of the internal input registers. An asynchronous  
reset clears all registers to a mid-scale code of 800H  
(DAC7724) or to a zero-scale of 000H (DAC7725). The  
DAC7724 and DAC7725 can operate from a single  
+15V supply, or from +15V and –15V supplies.  
LOW POWER: 250mW max  
SINGLE SUPPLY OUTPUT RANGE: +10V  
DUAL SUPPLY OUTPUT RANGE: ±10V  
SETTLING TIME: 10µs to 0.012%  
12-BIT LINEARITY AND MONOTONICITY:  
–40°C to +85°C  
RESET TO MID-SCALE (DAC7724) OR  
ZERO-SCALE (DAC7725)  
DATA READBACK  
DOUBLE-BUFFERED DATA INPUTS  
Low power and small size per DAC make the DAC7724  
and DAC7725 ideal for automatic test equipment,  
DAC-per-pin programmers, data acquisition systems,  
and closed-loop servo-control. The DAC7724 and  
DAC7725 are available in a PLCC-28 or a SO-28  
package, and offer guaranteed specifications over the  
–40°C to +85°C temperature range.  
APPLICATIONS  
PROCESS CONTROL  
CLOSED-LOOP SERVO-CONTROL  
MOTOR CONTROL  
DATA ACQUISITION SYSTEMS  
VDD  
VCC VREFH  
GND  
12  
I/O  
Buffer  
Input  
Register A  
DAC  
Register A  
VOUTA  
DB0-DB11  
DAC A  
Input  
Register B  
DAC  
Register B  
DAC B  
DAC C  
DAC D  
VOUTB  
VOUTC  
VOUTD  
A0  
A1  
Input  
Register C  
DAC  
Register C  
Control  
Logic  
R/W  
CS  
Input  
Register D  
DAC  
Register D  
VREFL  
VSS  
RESET LDAC  
International Airport Industrial Park  
Mailing Address: PO Box 11400, Tucson, AZ 85734  
Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706  
• Tel: (520) 746-1111  
Twx: 910-952-1111  
Internet: http://www.burr-brown.com/  
Cable: BBRCORP Telex: 066-6491  
FAX: (520) 889-1510 Immediate Product Info: (800) 548-6132  
© 1999 Burr-Brown Corporation  
PDS-1517B  
Printed in U.S.A. April, 2000  
SPECIFICATION (DUAL SUPPLY)  
At TA = –40°C to +85°C, VCC = +15V, VDD = +5V, VSS = –15V, VREFH = +10V, VREFL = –10V, unless otherwise noted.  
DAC7724N, U  
DAC7725N, U  
DAC7724NB, UB  
DAC7725NB, UB  
PARAMETER  
CONDITIONS  
MIN  
TYP  
MAX  
MIN  
TYP  
MAX  
UNITS  
ACCURACY  
Linearity Error  
±2  
±2  
±1  
±1  
±1  
±1  
LSB(1)  
LSB  
Linearity Matching(2)  
Differential Linearity Error  
Monotonicity  
LSB  
TMIN to TMAX  
Code = 000H  
12  
Bits  
Zero-Scale Error  
±2  
LSB  
Zero-Scale Drift  
Zero-Scale Matching(2)  
1
ppm/°C  
LSB  
±2  
±2  
±2  
±1  
Full-Scale Error  
Code = FFFH  
At Full Scale  
LSB  
Full-Scale Matching(2)  
Power Supply Sensitivity  
±1  
LSB  
10  
ppm/V  
ANALOG OUTPUT  
Voltage Output(3)  
Output Current  
VREFL  
VREFH  
V
±5  
mA  
pF  
Load Capacitance  
Short-Circuit Current  
Short-Circuit Duration  
No Oscillation  
500  
±20  
mA  
To VSS, VCC, or GND  
Indefinite  
REFERENCE INPUT  
VREFH Input Range  
VREFL Input Range  
VREFL +1.25  
–10  
+10  
V
VREFH – 1.25  
V
Ref High Input Current  
Ref Low Input Current  
–0.5  
–3.5  
3.0  
0
mA  
mA  
DYNAMIC PERFORMANCE  
Settling Time  
To ±0.012%, 20V Output Step  
8
0.25  
2
10  
µs  
LSB  
Channel-to-Channel Crosstalk  
Digital Feedthrough  
Full-Scale Step  
nV-s  
Output Noise Voltage  
f = 10kHz  
65  
nV/Hz  
DIGITAL INPUT/OUTPUT  
Logic Family  
Logic Levels  
VIH  
TTL-Compatible CMOS  
IIH ≤ ±10µA  
IIL ≤ ±10µA  
IOH = –0.8mA  
IOL = 1.6mA  
2.4  
VDD +0.3  
0.8  
V
V
V
V
VIL  
–0.3  
3.6  
VOH  
VDD  
VOL  
0.0  
0.4  
Data Format  
Straight Binary  
POWER SUPPLY REQUIREMENTS  
VDD  
+4.75  
+14.25  
–14.25  
+5.25  
+15.75  
–15.75  
V
V
VCC  
VSS  
V
IDD  
50  
6
µA  
mA  
mA  
mW  
ICC  
8.5  
ISS  
–8  
–6  
180  
Power Dissipation  
250  
TEMPERATURE RANGE  
Specified Performance  
–40  
+85  
°C  
NOTES: (1) LSB means Least Significant Bit, when VREFH equals +10V and VREFL equals –10V, then one LSB equals 4.88mV. (2) All DAC outputs will match within  
the specified error band. (3) Ideal output voltage, does not take into account zero or full-scale error.  
The information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions. BURR-BROWN assumes  
no responsibility for the use of this information, and all use of such information shall be entirely at the user’s own risk. Prices and specifications are subject to change  
without notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. BURR-BROWN does not authorize or warrant  
any BURR-BROWN product for use in life support devices and/or systems.  
®
2
DAC7724, 7725  
SPECIFICATION (SINGLE SUPPLY)  
At TA = –40°C to +85°C, VCC = +15V, VDD = +5V, VSS = GND, VREFH = +10V, VREFL = 0V, unless otherwise noted.  
DAC7724N, U  
DAC7725N, U  
DAC7724NB, UB  
DAC7725NB, UB  
PARAMETER  
CONDITIONS  
MIN  
TYP  
MAX  
MIN  
TYP  
MAX  
UNITS  
ACCURACY  
Linearity Error(1)  
±2  
±2  
±1  
±1  
±1  
±1  
LSB(2)  
LSB  
Linearity Matching(3)  
Differential Linearity Error  
Monotonicity  
LSB  
TMIN to TMAX  
Code = 004H  
12  
Bits  
Zero-Scale Error  
±4  
LSB  
Zero-Scale Drift  
Zero-Scale Matching(3)  
2
ppm/°C  
LSB  
±4  
±4  
±4  
±2  
Full-Scale Error  
Code = FFFH  
At Full Scale  
LSB  
Full-Scale Matching(3)  
Power Supply Sensitivity  
±2  
LSB  
20  
ppm/V  
ANALOG OUTPUT  
Voltage Output(4)  
Output Current  
VREFL  
VREFH  
V
±5  
mA  
pF  
Load Capacitance  
Short-Circuit Current  
Short-Circuit Duration  
No Oscillation  
500  
±20  
mA  
To VCC or GND  
Indefinite  
REFERENCE INPUT  
VREFH Input Range  
VREFL Input Range  
VREFL +1.25  
+10  
V
0
VREFH – 1.25  
V
Ref High Input Current  
Ref Low Input Current  
–0.3  
–2.0  
1.5  
0
mA  
mA  
DYNAMIC PERFORMANCE  
Settling Time(5)  
To ±0.012%, 10V Output Step  
8
0.25  
2
10  
µs  
LSB  
Channel-to-Channel Crosstalk  
Digital Feedthrough  
nV-s  
Output Noise Voltage  
f = 10kHz  
65  
nV/Hz  
DIGITAL INPUT/OUTPUT  
Logic Family  
Logic Levels  
VIH  
TTL-Compatible CMOS  
IIH ≤ ±10µA  
IIL ≤ ±10µA  
2.4  
VDD +0.3  
0.8  
V
V
V
V
VIL  
–0.3  
3.6  
VOH  
IOH = –0.8mA  
IOL = 1.6mA  
VDD  
VOL  
0.0  
0.4  
Data Format  
Straight Binary  
POWER SUPPLY REQUIREMENTS  
VDD  
+4.75  
14.25  
+5.25  
15.75  
V
V
VCC  
IDD  
50  
3.0  
45  
µA  
mA  
mW  
ICC  
Power Dissipation  
TEMPERATURE RANGE  
Specified Performance  
–40  
+85  
°C  
NOTES: (1) If VSS = 0V, specification applies at code 004H and above. (2) LSB means Least Significant Bit, when VREFH equals +10V and VREFL equals 0V, then  
one LSB equals 2.44mV. (3) All DAC outputs will match within the specified error band. (4) Ideal output voltage, does not take into account zero or full-scale error.  
(5) Full-scale positive 10V step and negative step from code FFFH to 004H.  
®
3
DAC7724, 7725  
ABSOLUTE MAXIMUM RATINGS(1)  
ELECTROSTATIC  
DISCHARGE SENSITIVITY  
This integrated circuit can be damaged by ESD. Burr-Brown  
recommends that all integrated circuits be handled with  
appropriate precautions. Failure to observe proper handling  
and installation procedures can cause damage.  
VCC to VSS ........................................................................... –0.3V to +32V  
VCC to GND ......................................................................... –0.3V to +16V  
VSS to GND ......................................................................... +0.3V to –16V  
VDD to GND ............................................................................. –0.3V to 6V  
VREFH to GND ....................................................................... –9V to +11V  
VREFL to GND (VSS = –15V) ................................................. –11V to +9V  
VREFL to GND (VSS = 0V) .................................................... –0.3V to +9V  
VREFH to VREFL ....................................................................... –1V to +22V  
Digital Input Voltage to GND ................................... –0.3V to VDD + 0.3V  
Digital Output Voltage to GND ................................. –0.3V to VDD + 0.3V  
Maximum Junction Temperature ................................................... +150°C  
Operating Temperature Range ........................................40°C to +85°C  
Storage Temperature Range ......................................... –65°C to +150°C  
Lead Temperature (soldering, 10s)............................................... +300°C  
ESD damage can range from subtle performance degradation  
to complete device failure. Precision integrated circuits may  
be more susceptible to damage because very small parametric  
changes could cause the device not to meet its published  
specifications.  
NOTE: (1) Stresses above those listed under “Absolute Maximum Ratings”  
may cause permanent damage to the device. Exposure to absolute maximum  
conditions for extended periods may affect device reliability.  
PACKAGE/ORDERING INFORMATION  
MAXIMUM  
LINEARITY  
ERROR  
MAXIMUM  
DIFFERENTIAL  
NONLINEARITY ERROR  
(LSB)  
PACKAGE  
DRAWING  
NUMBER  
SPECIFICATION  
TEMPERATURE  
RANGE  
ORDERING  
NUMBER(1)  
TRANSPORT  
MEDIA  
PRODUCT  
(LSB)  
PACKAGE  
DAC7724N  
±2  
"
±1  
"
±2  
"
±1  
"
±2  
"
±1  
"
±2  
"
±1  
"
±1  
"
±1  
"
±1  
"
±1  
"
±1  
"
±1  
"
±1  
"
±1  
"
PLCC-28  
251  
"
251  
"
217  
"
217  
"
251  
"
251  
"
217  
"
217  
"
–40°C to +85°C  
DAC7724N  
DAC7724N/750  
DAC7724NB  
DAC7724NB/750  
DAC7724U  
DAC7724U/1K  
DAC7724UB  
DAC7724UB/1K  
DAC7725N  
DAC7725N/750  
DAC7725NB  
DAC7725NB/750  
DAC7725U  
DAC7725U/1K  
DAC7725UB  
DAC7725UB/1K  
Rails  
Tape and Reel  
Rails  
Tape and Reel  
Rails  
Tape and Reel  
Rails  
Tape and Reel  
Rails  
Tape and Reel  
Rails  
Tape and Reel  
Rails  
Tape and Reel  
Rails  
Tape and Reel  
"
"
"
DAC7724NB  
PLCC-28  
–40°C to +85°C  
"
"
"
DAC7724U  
SO-28  
–40°C to +85°C  
"
"
"
DAC7724UB  
SO-28  
–40°C to +85°C  
"
"
"
DAC7725N  
PLCC-28  
–40°C to +85°C  
"
"
"
DAC7725NB  
PLCC-28  
–40°C to +85°C  
"
"
"
DAC7725U  
SO-28  
–40°C to +85°C  
"
"
SO-28  
"
"
DAC7725UB  
–40°C to +85°C  
"
"
NOTE: (1) Models with a slash (/) are available only in Tape and Reel in the quantities indicated (e.g., /750 indicates 750 devices per reel). Ordering 750 pieces  
of “DAC7724/750” will get a single 750-piece Tape and Reel.  
ESD PROTECTION CIRCUITS  
VCC  
VCC  
RefH  
VOUT  
RefL  
VSS  
VSS  
1 of 4  
VDD  
VDD  
GND  
Typ of Each  
Logic Input Pin  
Typ of Each  
I/O Pin  
®
4
DAC7724, 7725  
PIN CONFIGURATIONS  
Top View  
SO  
PLCC  
VREFH  
VOUTB  
1
2
3
4
5
6
7
8
9
28 VREFL  
27 VOUTC  
26 VOUTD  
25 VCC  
4
3
2
1
28 27 26  
VOUTA  
25 VCC  
GND  
RESET  
LDAC  
5
6
7
VSS  
24 VDD  
GND  
24 VDD  
23 CS  
RESET  
LDAC  
23 CS  
DAC7724  
DAC7725  
22 A0  
(LSB) DB0  
DB1  
8
9
22 A0  
DAC7724  
DAC7725  
21 A1  
(LSB) DB0  
DB1  
21 A1  
20 R/W  
19 DB11 (MSB)  
DB2 10  
DB3 11  
20 R/W  
19 DB11 (MSB)  
18 DB10  
17 DB9  
16 DB8  
15 DB7  
DB2 10  
DB3 11  
DB4 12  
DB5 13  
DB6 14  
12 13 14 15 16 17 18  
PIN DESCRIPTIONS  
PIN  
NAME  
DESCRIPTION  
1
2
3
4
5
6
VREFH  
VOUTB  
VOUTA  
VSS  
Reference Input Voltage High. Sets maximum output voltage for all DACs.  
DAC B Voltage Output.  
DAC A Voltage Output.  
Negative Analog Supply Voltage, 0V or –15V.  
Ground.  
GND  
RESET  
Asynchronous Reset Input. Sets DAC and input registers to either mid-scale (800H, DAC7724) or zero-scale (000H, DAC7725)  
when LOW.  
7
LDAC  
DB0  
DB1  
DB2  
DB3  
DB4  
DB5  
DB6  
DB7  
DB8  
DB9  
DB10  
DB11  
R/W  
A1  
Load DAC Input. All DAC Registers are transparent when LOW.  
8
Data Bit 0. Least significant bit of 12-bit word.  
9
Data Bit 1  
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
26  
27  
28  
Data Bit 2  
Data Bit 3  
Data Bit 4  
Data Bit 5  
Data Bit 6  
Data Bit 7  
Data Bit 8  
Data Bit 9  
Data Bit 10  
Data Bit 11. Most significant bit of 12-bit word.  
Read/Write Control Input (read = HIGH, write = LOW).  
Register/DAC Select (C or D = HIGH, A or B = LOW).  
Register/DAC Select (B or D = HIGH, A or C = LOW).  
Chip Select Input.  
A0  
CS  
VDD  
Positive Digital Supply, +5V.  
VCC  
Positive Analog Supply Voltage, +15V nominal.  
DAC D Voltage Output.  
VOUTD  
VOUTC  
VREFL  
DAC C Voltage Output.  
Reference Input Voltage Low. Sets minimum output voltage for all DACs.  
®
5
DAC7724, 7725  
TYPICAL PERFORMANCE CURVES: VSS = 0V  
At TA = +25°C, VCC = +15V, VDD = +5V, VSS = 0V, VREFH = +10V, VREFL = 0V, representative unit, unless otherwise specified.  
LINEARITY ERROR AND  
DIFFERENTIAL LINEARITY ERROR vs CODE  
Single Channel 25°C  
LINEARITY ERROR AND  
DIFFERENTIAL LINEARITY ERROR vs CODE  
Single Channel 85°C  
(Typical of Each Output Channel)  
(Typical of Each Output Channel)  
0.5  
0.4  
0.5  
0.4  
0.3  
0.3  
0.2  
0.2  
0.1  
0.1  
0
0
–0.1  
–0.2  
–0.3  
–0.4  
–0.5  
–0.1  
–0.2  
–0.3  
–0.4  
–0.5  
0.5  
0.4  
0.5  
0.4  
0.3  
0.3  
0.2  
0.2  
0.1  
0.1  
0
0
–0.1  
–0.2  
–0.3  
–0.4  
–0.5  
–0.1  
–0.2  
–0.3  
–0.4  
–0.5  
000H 200H  
400H 600H  
800H  
A00H C00H  
E00H FFFH  
000H 200H  
400H 600H  
800H  
A00H C00H  
E00H FFFH  
Digital Input Code  
Digital Input Code  
LINEARITY ERROR AND  
DIFFERENTIAL LINEARITY ERROR vs CODE  
Single Channel –40°C  
ZERO-SCALE ERROR vs TEMPERATURE  
(Code 004H)  
(Typical of Each Output Channel)  
2.0  
1.5  
0.5  
0.4  
0.3  
0.2  
0.1  
DAC B  
0
1.0  
DAC D  
DAC A  
–0.1  
–0.2  
–0.3  
–0.4  
–0.5  
0.5  
0
0.5  
0.4  
–0.5  
–1.0  
–1.5  
–2.0  
0.3  
DAC C  
0.2  
0.1  
0
–0.1  
–0.2  
–0.3  
–0.4  
–0.5  
–40 –30 –20 –10  
0
10 20 30 40 50 60 70 80 90  
000H 200H  
400H 600H  
800H  
A00H C00H  
E00H FFFH  
Temperature (°C)  
Digital Input Code  
CURRENT vs CODE  
All DACs Sent to Indicated Code  
FULL-SCALE ERROR vs TEMPERATURE  
(Code FFFH)  
VREFH  
2.0  
1.5  
1.2  
1.0  
0.8  
0.6  
0.4  
0.2  
0
1.0  
DAC B  
DAC D  
DAC A  
0.5  
–0.2  
–0.4  
VREFL  
0
0
–0.2  
–0.4  
–0.6  
–0.8  
–1.0  
–1.2  
–1.4  
–1.6  
–0.5  
–1.0  
–1.5  
–2.0  
DAC C  
–40 –30 –20 –10  
0
10 20 30 40 50 60 70 80 90  
000H 200H  
400H 600H  
800H  
A00H C00H  
E00H FFFH  
Temperature (°C)  
Digital Input Code  
®
6
DAC7724, 7725  
TYPICAL PERFORMANCE CURVES: VSS = 0V (Cont.)  
At TA = +25°C, VCC = +15V, VDD = +5V, VSS = 0V, VREFH = +10V, VREFL = 0V, representative unit, unless otherwise specified.  
POSITIVE SUPPLY CURRENT  
vs DIGITAL INPUT CODE  
POWER SUPPLY CURRENT vs TEMPERATURE  
ICC  
4.0  
3.5  
3.0  
2.5  
2.0  
1.5  
1.0  
0.5  
0
3.00  
2.50  
2.00  
1.50  
1.00  
0.50  
0
ICC  
No Load  
IDD  
IDD  
–0.5  
–40 –30 –20 –10  
0
10 20 30 40 50 60 70 80 90 100  
000H 200H 400H 600H 800H A00H C00H E00H FFFH  
Temperature (°C)  
Digital Input Code  
OUTPUT VOLTAGE vs SETTLING TIME  
(0V to +10V)  
OUTPUT VOLTAGE vs SETTLING TIME  
(+10V to 0V)  
Large Signal Settling Time: 5V/div  
Large Signal Settling Time: 5V/div  
Small Signal  
Settling Time: 1LSB/div  
Small Signal Settling Time: 1LSB/div  
+5V  
LDAC  
0
+5V  
LDAC  
0
Time (2µs/div)  
Time (2µs/div)  
OUTPUT VOLTAGE  
OUTPUT VOLTAGE  
MID-SCALE GLITCH PERFORMANCE  
MID-SCALE GLITCH PERFORMANCE  
7FFH to 800H  
800H to 7FFH  
+5V  
LDAC  
0
+5V  
LDAC  
0
Time (1µs/div)  
Time (1µs/div)  
®
7
DAC7724, 7725  
TYPICAL PERFORMANCE CURVES: VSS = 0V (Cont.)  
At TA = +25°C, VCC = +15V, VDD = +5V, VSS = 0V, VREFH = +10V, VREFL = 0V, representative unit, unless otherwise specified.  
LOGIC SUPPLY CURRENT  
OUTPUT NOISE vs FREQUENCY  
vs LOGIC INPUT LEVEL FOR DATA BITS  
1000  
100  
10  
5
4
3
2
1
0
Code 004H  
Code FFFH  
0
0.1  
1
10  
100  
1000  
10000  
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0  
Logic Input Level for Data Bits (V)  
Frequency (kHz)  
OUTPUT VOLTAGE vs RLOAD  
SINGLE SUPPLY CURRENT LIMIT vs INPUT CODE  
Short to Ground  
16  
14  
12  
10  
8
20  
15  
10  
Source  
5
0
6
–5  
4
–10  
–15  
–20  
Short to VCC  
2
Sink  
0
0.01  
0.1  
1
10  
100  
000H 200H 400H 600H 800H A00H C00H E00H FFFH  
R
LOAD (kW)  
Digital Input Code  
POWER SUPPLY REJECTION RATIO vs FREQUENCY  
0
–10  
–20  
–30  
–40  
–50  
–60  
–70  
–80  
–90  
+15V  
+5V  
–100  
–110  
–120  
101  
102  
103  
104  
105  
106  
Frequency (Hz)  
®
8
DAC7724, 7725  
TYPICAL PERFORMANCE CURVES: VSS = –15V  
At TA = +25°C, VCC = +15V, VDD = +5V, VSS = –15V, VREFH = +10V, VREFL = –10V, representative unit, unless otherwise specified.  
LINEARITY ERROR AND  
DIFFERENTIAL LINEARITY ERROR vs CODE  
Single Channel 85°C  
LINEARITY ERROR AND  
DIFFERENTIAL LINEARITY ERROR vs CODE  
Single Channel 25°C  
(Typical of Each Output Channel)  
(Typical of Each Output Channel)  
0.5  
0.4  
0.5  
0.4  
0.3  
0.3  
0.2  
0.2  
0.1  
0.1  
0
0
–0.1  
–0.2  
–0.3  
–0.4  
–0.5  
–0.1  
–0.2  
–0.3  
–0.4  
–0.5  
0.5  
0.4  
0.5  
0.4  
0.3  
0.3  
0.2  
0.2  
0.1  
0.1  
0
0
–0.1  
–0.2  
–0.3  
–0.4  
–0.5  
–0.1  
–0.2  
–0.3  
–0.4  
–0.5  
000H 200H  
400H 600H  
800H  
A00H C00H  
E00H FFFH  
000H 200H  
400H 600H  
800H  
A00H C00H  
E00H FFFH  
Digital Input Code  
Digital Input Code  
LINEARITY ERROR AND  
DIFFERENTIAL LINEARITY ERROR vs CODE  
Single Channel –40°C  
CURRENT vs CODE  
All DACs Sent to Indicated Code  
VREFH  
(Typical of Each Output Channel)  
0.5  
0.4  
2.5  
2.0  
1.5  
1.0  
0.5  
0
0.3  
0.2  
0.1  
0
–0.1  
–0.2  
–0.3  
–0.4  
–0.5  
–0.5  
VREFL  
0
–0.5  
–1.0  
–1.5  
–2.0  
–2.5  
–3.0  
0.5  
0.4  
0.3  
0.2  
0.1  
0
–0.1  
–0.2  
–0.3  
–0.4  
–0.5  
000H 200H  
400H 600H  
800H  
A00H C00H E000H FFFH  
000H 200H  
400H 600H  
800H  
A00H C00H  
E00H FFFH  
Digital Input Code  
Digital Input Code  
BIPOLAR ZERO-SCALE ERROR vs TEMPERATURE  
(Code 800H)  
POSITIVE FULL-SCALE ERROR vs TEMPERATURE  
(Code FFFH)  
2.0  
1.5  
2.0  
1.5  
1.0  
1.0  
DAC A  
DAC B  
DAC B  
DAC D  
0.5  
0.5  
0
0
DAC A  
–0.5  
–1.0  
–1.5  
–2.0  
–0.5  
–1.0  
–1.5  
–2.0  
DAC D  
DAC C  
DAC C  
–40 –30 –20 –10  
0
10 20 30 40 50 60 70 80 90  
–40 –30 –20 –10  
0
10 20 30 40 50 60 70 80 90  
Temperature (°C)  
Temperature (°C)  
®
9
DAC7724, 7725  
TYPICAL PERFORMANCE CURVES: VSS = –15V (Cont.)  
At TA = +25°C, VCC = +15V, VDD = +5V, VSS = –15V, VREFH = +10V, VREFL = –10V, representative unit, unless otherwise specified.  
NEGATIVE FULL-SCALE ERROR vs TEMPERATURE  
(Code 000H)  
POWER SUPPLY CURRENT vs TEMPERATURE  
ICC  
2.0  
1.5  
7
6
5
4
1.0  
DAC B  
3
2
1
Data = FFFH (all DACs)  
No Load  
DAC D  
DAC A  
0.5  
0
0
–1  
–2  
–3  
–4  
–5  
–6  
–7  
IDD  
–0.5  
–1.0  
–1.5  
–2.0  
DAC C  
ISS  
–40 –30 –20 –10  
0
10 20 30 40 50 60 70 80 90  
–40 –30 –20 –10  
0
10 20 30 40 50 60 70 80 90  
Temperature (°C)  
Temperature (°C)  
OUTPUT VOLTAGE vs RLOAD  
SUPPLY CURRENT vs CODE  
6
5
15  
10  
5
ICC  
4
Source  
Data = FFFH (all DACs)  
No Load  
3
2
1
0
0
IDD  
–1  
–2  
–3  
–4  
–5  
–6  
–5  
–10  
–15  
Sink  
ISS  
0.01  
0.1  
1
10  
100  
000H 200H 400H 600H 800H A00H C00H E00H FFFH  
RLOAD (k)  
Digital Input Code  
OUTPUT VOLTAGE vs SETTLING TIME  
(–10V to +10V)  
OUTPUT VOLTAGE vs SETTLING TIME  
(+10V to –10V)  
Large Signal  
Settling Time: 5V/div  
Small Signal  
Settling Time: 0.5LSB/div  
Small Signal  
Settling Time: 0.5LSB/div  
Large Signal  
Settling Time: 5V/div  
+5V  
+5V  
LDAC  
0
LDAC  
0
Time (2µs/div)  
Time (2µs/div)  
®
10  
DAC7724, 7725  
TYPICAL PERFORMANCE CURVES: VSS = –15V (Cont.)  
At TA = +25°C, VCC = +15V, VDD = +5V, VSS = –15V, VREFH = +10V, VREFL = –10V, representative unit, unless otherwise specified.  
DUAL SUPPLY CURRENT LIMIT vs INPUT CODE  
POWER SUPPLY REJECTION RATIO vs FREQUENCY  
SHORT TO GROUND  
0
–10  
–20  
–30  
–40  
–50  
–60  
–70  
–80  
–90  
–100  
–110  
–120  
20  
15  
10  
5
–15V  
0
+15V  
–5  
–10  
–15  
–20  
+5V  
101  
102  
103  
104  
105  
106  
000H 200H 400H 600H 800H A00H C00H E00H FFFH  
Frequency (Hz)  
Digital Input Code  
OUTPUT VOLTAGE  
MID-SCALE GLITCH PERFORMANCE  
BROADBAND NOISE  
7FFH to 800H  
800H to 7FFH  
BW = 1MHz  
Code = 800H  
+5V  
LDAC  
0
Time (1µs/div)  
Time (1ms/div)  
OUTPUT NOISE vs FREQUENCY  
DATA BUS FEEDTHROUGH GLITCH  
1000  
100  
10  
Noise at any code  
+5V  
DATA BUS  
0
0
0.1  
1
10  
100  
1000  
10000  
Time (0.5µs/div)  
Frequency (kHz)  
®
11  
DAC7724, 7725  
output (“full-scale”) are set by the external voltage refer-  
ences (VREFL and VREFH, respectively). The digital input is  
a 12-bit parallel word and the DAC input registers offer a  
readback capability. The converters can be powered from a  
single +15V supply or a dual ±15V supply. Each device  
offers a reset function which immediately sets all DAC  
registers and DAC output voltages to mid-scale (DAC7724,  
code 800H) or to zero-scale (DAC7725, code 000H). See  
Figures 2 and 3 for the basic operation of the DAC7724/25.  
THEORY OF OPERATION  
The DAC7724 and DAC7725 are quad voltage output,  
12-bit digital-to-analog converters (DACs). The architecture  
is a classic R-2R ladder configuration followed by an opera-  
tional amplifier that serves as a buffer, as shown in Figure 1.  
Each DAC has its own R-2R ladder network and output op-  
amp, but all share the reference voltage inputs. The mini-  
mum voltage output (“zero-scale”) and maximum voltage  
RF  
VOUT  
R
R
R
R
R
R
R
2R  
2R  
2R  
2R  
2R  
2R  
2R  
2R  
2R  
VREFH  
VREFL  
FIGURE 1. DAC7724/25 Architecture.  
DAC7724  
DAC7725  
+10.00V  
0.1µF  
+15V  
+
1
2
3
4
5
6
7
8
9
VREFH  
VOUTB  
VOUTA  
VSS  
VREFL 28  
VOUTC 27  
VOUTD 26  
VCC 25  
VDD 24  
CS 23  
0V to +10V  
0V to +10V  
0V to +10V  
0V to +10V  
0.1µF  
0.1µF  
1µF to 10µF  
+5V  
+
GND  
RESET  
LDAC  
DB0  
1µF to 10µF  
Reset DACs(1)  
Chip Select  
A0 22  
Load DAC Registers  
Address Bus  
or Decoder  
A1 21  
DB1  
R/W 20  
DB11 19  
DB10 18  
DB9 17  
DB8 16  
DB7 15  
Read/Write  
10 DB2  
11 DB3  
12 DB4  
13 DB5  
14 DB6  
Data Bus  
Data Bus  
NOTE: (1) Reset LOW sets all DACs to code 800H on the DAC7724 and to code 000H on the DAC7725.  
FIGURE 2. Basic Single-Supply Operation of the DAC7724/25.  
®
12  
DAC7724, 7725  
DAC7724  
DAC7725  
+10.000V  
–10.000V  
0.1µF  
–10V to +10V  
–10V to +10V  
0.1µF  
–10V to +10V  
–10V to +10V  
+15V  
+
1
2
3
4
5
6
7
8
9
VREFH  
VOUTB  
VOUTA  
VSS  
VREFL 28  
VOUTC 27  
VOUTD 26  
VCC 25  
VDD 24  
CS 23  
0.1µF  
0.1µF  
1µF to 10µF  
–15V  
+5V  
+
1µF to 10µF  
0.1µF  
+
GND  
RESET  
LDAC  
DB0  
1µF to 10µF  
Reset DACs(1)  
Chip Select  
Load DAC Registers  
A0 22  
Address Bus  
or Decoder  
A1 21  
Read/Write  
DB1  
R/W 20  
DB11 19  
DB10 18  
DB9 17  
DB8 16  
DB7 15  
10 DB2  
11 DB3  
12 DB4  
13 DB5  
14 DB6  
Data Bus  
Data Bus  
NOTE: (1) Reset LOW sets all DACs to code 800H on the DAC7724 and to code 000H on the DAC7725.  
FIGURE 3. Basic Dual-Supply Operation of the DAC7724/25.  
ANALOG OUTPUTS  
tially, the offset of the output op-amp). The maximum  
output is equal to VREFH plus a similar offset voltage. Note  
that VSS (the negative power supply) must either be con-  
nected to ground or must be in the range of –14.25V to  
–15.75V. The voltage on VSS sets several bias points within  
the converter, if VSS is not in one of these two configura-  
tions, the bias values may be in error and proper operation  
of the device is not guaranteed.  
When VSS = –15V (dual supply operation), the output  
amplifier can swing to within 4V of the supply rails, guar-  
anteed over the –40°C to +85°C temperature range. With  
VSS = 0V (single-supply operation) and RLOAD connected to  
ground, the output can swing to ground. Note that the  
settling time of the output op-amp will be longer with  
voltages very near ground. Additionally, care must be taken  
when measuring the zero-scale error when VSS = 0V. Since  
the output voltage cannot swing below ground, the output  
voltage may not change for the first few digital input codes  
(000H, 001H, 002H, etc.) if the output amplifier has a nega-  
tive offset. At the negative offset limit of –4 LSB (-9.76mV),  
for the single-supply case, the first specified output starts at  
code 004H.  
The current into the VREFH input and out of VREFL depends  
on the DAC output voltages and can vary from a few  
microamps to approximately 0.3mA. The reference input  
appears as a varying load to the reference. If the reference  
can sink or source the required current, a reference buffer is  
not required. See “Reference Current vs Code” in the Typi-  
cal Performance Curves.  
The analog supplies (or the analog supplies and the refer-  
ence power supplies) have to come up first. If the power  
supplies for the references come up first, then the VCC and  
VSS supplies will be “powered from the reference via the  
ESD protection diodes” (see page 4).  
REFERENCE INPUTS  
For dual-supply operation, the reference inputs, VREFL and  
VREFH, can be any voltage between VSS + 4V and VCC – 4V  
provided that VREFH is at least 1.25V greater than VREFL  
.
For single-supply operation (VSS = 0V), VREFL value can be  
above 0V, with the same provision that VREFH is at least  
1.25V greater than VREFL. The minimum output of each  
DAC is equal to VREFL plus a small offset voltage (essen-  
Bypassing the reference voltage or voltages with at least a  
0.1uF capacitor placed as close to the DAC7724/25 package  
is strongly recommended.  
®
13  
DAC7724, 7725  
DIGITAL INTERFACE  
The double buffered architecture is mainly designed so that  
each DAC Input Register can be written at any time and then  
all DAC output voltages updated simultaneously by pulling  
LDAC LOW. It also allows a DAC Input Register to be  
written to at any point and the DAC voltage to be synchro-  
nously changed via a trigger signal connected to LDAC.  
Table I shows the basic control logic for the DAC7724/25.  
Note that each internal register is level triggered and not  
edge triggered. When the appropriate signal is LOW, the  
register becomes transparent. When this signal is returned  
HIGH, the digital word currently in the register is latched.  
The first set of registers (the Input Registers) are triggered  
via the A0, A1, R/W, and CS inputs. Only one of these  
registers is transparent at any given time. The second set of  
registers (the DAC Registers) are all transparent when LDAC  
input is pulled LOW.  
DIGITAL TIMING  
Figure 4 and Table II provide detailed timing for the digital  
interface of the DAC7724 and DAC7725.  
DIGITAL INPUT CODING  
Each DAC can be updated independently by writing to the  
appropriate Input Register and then updating the DAC  
Register. Alternatively, the entire DAC Register set can be  
configured as always transparent by keeping LDAC LOW—  
the DAC update will occur when the Input Register is  
written.  
The DAC7724 and DAC7725 input data is in straight binary  
format. The output voltage is given by the following equa-  
tion:  
V
– VREFL • N  
(
)
REFH  
VOUT = VREFL  
+
4096  
where N is the digital input code. This equation does not  
include the effects of offset (zero-scale) errors.  
STATE OF  
SELECTED  
INPUT  
SELECTED  
INPUT  
STATE OF  
ALL DAC  
A1  
A0  
R/W  
CS  
RESET  
LDAC  
REGISTER  
REGISTER  
REGISTERS  
L(1)  
L
H
H
L
L
H
L
H
L
H
L
H
L
H
L
H
X
X
X
L
L
L
L
L
L
L
L
H
H
H
H
X
X
X
L
L
L
L
L
L
L
L
L
L
L
L
H
H
X
H(2)  
H
H
H
H
H
H
H
H
H
H
H
H
H
L
L
L
L
A
B
C
D
A
B
C
D
A
Transparent  
Transparent  
Transparent  
Transparent  
Transparent  
Transparent  
Transparent  
Transparent  
Readback  
Readback  
Readback  
Readback  
(All Latched)  
(All Latched)  
Reset(4)  
Transparent  
Transparent  
Transparent  
Transparent  
Latched  
Latched  
Latched  
Latched  
Latched  
Latched  
Latched  
Latched  
Transparent  
Latched  
Reset(4)  
L
H
H
H
H
H
H
H
H
L
L
H
H
L
L
B
C
D
H
H
X(3)  
X
NONE  
NONE  
ALL  
H
X
X
NOTES: (1) L = Logic LOW. (2) H= Logic HIGH. (3) X = Don’t Care. (4) DAC7724 resets to 800H, DAC7725 resets to 000H. When RESET rises, all registers  
that are in their latched state retain the reset value.  
TABLE I. DAC7724 and DAC7725 Control Logic Truth Table.  
®
14  
DAC7724, 7725  
tLD  
tWCS  
CS  
tWS  
tWH  
R/W  
tRCS  
tAH  
tAS  
CS  
A0/A1  
tRDH  
tRDS  
tLWD  
R/W  
tAS  
tAH  
LDAC  
±0.012% of FSR  
Error Band  
tDH  
tDS  
A0/A1  
Data In  
tDZ  
tS  
Data Out  
Data Valid  
tCSD  
VOUT  
Data Read Timing  
Data Write Timing  
±0.012% of FSR  
Error Band  
tRESET  
RESET  
tS  
+FS  
VOUT, DAC7725  
–FS  
±0.012% of FSR  
Error Band  
+FS  
VOUT, DAC7724  
–FS  
Mid-Scale  
±0.012% of FSR  
DAC7724/25 Reset Timing  
Error Band  
FIGURE 4. Digital Input and Output Timing.  
SYMBOL  
DESCRIPTION  
CS LOW for Read  
R/W HIGH to CS LOW  
R/W HIGH after CS HIGH  
CS HIGH to Data Bus in High Impedance  
CS LOW to Data Bus Valid  
CS LOW for Write  
MIN  
TYP  
MAX  
UNITS  
tRCS  
tRDS  
tRDH  
tDZ  
tCSD  
tWCS  
tWS  
tWH  
tAS  
tAH  
tLD  
tDS  
tDH  
tLWD  
tRESET  
tS  
200  
10  
10  
ns  
ns  
ns  
ns  
ns  
ns  
ns  
ns  
ns  
ns  
ns  
ns  
ns  
ns  
ns  
µs  
100  
100  
160  
50  
0
0
0
0
10  
0
0
50  
50  
R/W LOW to CS LOW  
R/W LOW after CS HIGH  
Address Valid to CS LOW  
Address Valid after CS HIGH  
LDAC Delay from CS HIGH  
Data Valid to CS LOW  
Data Valid after CS HIGH  
LDAC LOW  
RESET LOW Time  
Settling Time  
10  
TABLE II. Timing Specifications (TA = –40°C to +85°C).  
®
15  
DAC7724, 7725  
配单直通车
  •  
  • 供货商
  • 型号 *
  • 数量*
  • 厂商
  • 封装
  • 批号
  • 交易说明
  • 询价
批量询价选中的记录已选中0条,每次最多15条。
 复制成功!