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  • LMC662CMX/NOPB图
  • 深圳市广百利电子有限公司

     该会员已使用本站6年以上
  • LMC662CMX/NOPB 现货库存
  • 数量18500 
  • 厂家TI(德州仪器) 
  • 封装SOIC-8 
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  • LMC662CMX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
  • LMC662CMX 现货库存
  • 数量92000 
  • 厂家TI/德州仪器 
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  • LMC662CMX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
  • LMC662CMX 现货库存
  • 数量2500 
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  • LMC662CM图
  • 深圳市科时进电子有限公司

     该会员已使用本站11年以上
  • LMC662CM 现货库存
  • 数量920 
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  • LMC662CM图
  • 深圳市芯脉实业有限公司

     该会员已使用本站11年以上
  • LMC662CM 现货库存
  • 数量95 
  • 厂家TI 
  • 封装SOIC (D) 
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  • LMC662CM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
  • LMC662CM
  • 数量27782 
  • 厂家NS 
  • 封装SOP8 
  • 批号2023+ 
  • 绝对原装正品全新进口深圳现货
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  • LMC662CM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
  • LMC662CM
  • 数量27782 
  • 厂家NS 
  • 封装SOP8 
  • 批号2023+ 
  • 绝对原装正品全新深圳进口现货,优质渠道供应商!
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  • 美驻深办0755-83777708“进口原装正品专供” QQ:1002316308QQ:515102657
  • LMC662CM图
  • 深圳市赛尔通科技有限公司

     该会员已使用本站12年以上
  • LMC662CM
  • 数量12850 
  • 厂家NS 
  • 封装SOP8 
  • 批号NEW 
  • 绝对进口原装现货,市场价格最低!!
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  • LMC662CM图
  • 集好芯城

     该会员已使用本站13年以上
  • LMC662CM
  • 数量18514 
  • 厂家NS/国半 
  • 封装SOP-8 
  • 批号最新批次 
  • 原装原厂 现货现卖
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  • LMC662CM S图
  • 北京首天国际有限公司

     该会员已使用本站16年以上
  • LMC662CM S
  • 数量5850 
  • 厂家NS 
  • 封装SOP-8 
  • 批号2024+ 
  • 百分百原装正品,现货库存
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    QQ:1318502189QQ:1318502189 复制
  • 010-62565447 QQ:528164397QQ:1318502189
  • LMC662CM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
  • LMC662CM
  • 数量500 
  • 厂家NS 
  • 封装SOP8 
  • 批号24+ 
  • ★★专业IC现货,诚信经营,市场最优价★★
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  • LMC662CM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
  • LMC662CM
  • 数量5369 
  • 厂家NS 
  • 封装SOP8 
  • 批号24+ 
  • 全新原装现货,欢迎询购!
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  • LMC662CM ( T/R )图
  • 北京中其伟业科技有限公司

     该会员已使用本站16年以上
  • LMC662CM ( T/R )
  • 数量10467 
  • 厂家NS 
  • 封装 
  • 批号16+ 
  • 特价,原装正品,绝对公司现货库存,原装特价!
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  • 010-62104891 QQ:2880824479
  • LMC662CMTR图
  • 北京首天国际有限公司

     该会员已使用本站16年以上
  • LMC662CMTR
  • 数量4000 
  • 厂家NS 
  • 封装 
  • 批号2024+ 
  • 百分百原装正品,现货库存
  • QQ:528164397QQ:528164397 复制
    QQ:1318502189QQ:1318502189 复制
  • 010-62565447 QQ:528164397QQ:1318502189
  • LMC662CM图
  • 深圳市恒益昌科技有限公司

     该会员已使用本站6年以上
  • LMC662CM
  • 数量3000 
  • 厂家NS 
  • 封装SOP 
  • 批号25+ 
  • 全新原装正品现货
  • QQ:3336148967QQ:3336148967 复制
    QQ:974337758QQ:974337758 复制
  • 0755-82723761 QQ:3336148967QQ:974337758
  • LMC662CMX/NOPB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
  • LMC662CMX/NOPB
  • 数量12048 
  • 厂家TI(德州仪器) 
  • 封装SOP-8 
  • 批号23+ 
  • 原厂可订货,技术支持,直接渠道。可签保供合同
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  • 0755-83061789 QQ:3007947087QQ:3007947087
  • LMC662CM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
  • LMC662CM
  • 数量5000 
  • 厂家NS 
  • 封装SOP8 
  • 批号2024+ 
  • 百分百原装正品,现货库存
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  • LMC662CM图
  • 深圳市晶美隆科技有限公司

     该会员已使用本站14年以上
  • LMC662CM
  • 数量15372 
  • 厂家TI 
  • 封装SOP8 
  • 批号23+ 
  • 全新原装正品现货热卖
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  • LMC662CM图
  • 深圳市西昂特科技有限公司

     该会员已使用本站13年以上
  • LMC662CM
  • 数量15500 
  • 厂家NSC 
  • 封装SOP-8 
  • 批号08+/09+ 
  • 全新原装现货特价
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  • LMC662CM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
  • LMC662CM
  • 数量5000 
  • 厂家NS 
  • 封装SOP8 
  • 批号2024+ 
  • 百分百原装正品,现货库存
  • QQ:857273081QQ:857273081 复制
    QQ:1594462451QQ:1594462451 复制
  • 010-62104891 QQ:857273081QQ:1594462451
  • LMC662CM/NOPB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
  • LMC662CM/NOPB
  • 数量6221 
  • 厂家NS 
  • 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
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  • 0755-22655674 QQ:1686616797QQ:2440138151
  • LMC662CMS图
  • 深圳市惊羽科技有限公司

     该会员已使用本站11年以上
  • LMC662CMS
  • 数量18800 
  • 厂家TI-德州仪器 
  • 封装SOP-8.贴片 
  • 批号▉▉:2年内 
  • ▉▉¥10一一有问必回一一有长期订货一备货HK仓库
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  • 131-4700-5145---Q-微-恭-候---有-问-秒-回 QQ:43871025
  • LMC662CM图
  • 深圳市惊羽科技有限公司

     该会员已使用本站11年以上
  • LMC662CM
  • 数量9328 
  • 厂家TI-德州仪器 
  • 封装SOP-8.贴片 
  • 批号▉▉:2年内 
  • ▉▉¥9.7元一有问必回一有长期订货一备货HK仓库
  • QQ:43871025QQ:43871025 复制
  • 131-4700-5145---Q-微-恭-候---有-问-秒-回 QQ:43871025
  • LMC662CM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
  • LMC662CM
  • 数量5000 
  • 厂家NS 
  • 封装SOP8 
  • 批号16+ 
  • 百分百原装正品,现货库存
  • QQ:857273081QQ:857273081 复制
    QQ:1594462451QQ:1594462451 复制
  • 010-62106431 QQ:857273081QQ:1594462451
  • LMC662CM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
  • LMC662CM
  • 数量5000 
  • 厂家NS 
  • 封装SOP8 
  • 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
  • LMC662CM图
  • 深圳市恒达亿科技有限公司

     该会员已使用本站12年以上
  • LMC662CM
  • 数量3000 
  • 厂家NS 
  • 封装SOP8 
  • 批号25+ 
  • 全新原装公司现货库存!
  • QQ:867789136QQ:867789136 复制
    QQ:1245773710QQ:1245773710 复制
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  • LMC662CM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
  • LMC662CM
  • 数量13000 
  • 厂家NS/国半 
  • 封装NA/ 
  • 批号23+ 
  • 优势代理渠道,原装正品,可全系列订货开增值税票
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  • 0755-82546830 QQ:3007977934QQ:3007947087
  • LMC662CM图
  • 深圳市高捷芯城科技有限公司

     该会员已使用本站11年以上
  • LMC662CM
  • 数量7793 
  • 厂家TI(德州仪器) 
  • 封装SOP-8 
  • 批号23+ 
  • 支持大陆交货,美金交易。原装现货库存。
  • QQ:3007977934QQ:3007977934 复制
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  • LMC662CM图
  • 深圳市毅创腾电子科技有限公司

     该会员已使用本站16年以上
  • LMC662CM
  • 数量1337 
  • 厂家NS 
  • 封装SOP8 
  • 批号22+ 
  • ★只做原装★正品现货★原盒原标★
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  • LMC662CM/NOPB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
  • LMC662CM/NOPB
  • 数量2776 
  • 厂家Texas Instruments 
  • 封装8-SOIC(0.154,3.90mm 宽) 
  • 批号21+ 
  • 正规渠道/品质保证/原装正品现货
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  • 0755-83247729 QQ:2881514372
  • LMC662CM/NOPB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
  • LMC662CM/NOPB
  • 数量12500 
  • 厂家TI 
  • 封装Original 
  • 批号2023+ 
  • 绝对原装正品现货/优势渠道商、原盘原包原盒
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  • 深圳分公司0755-83777708“进口原装正品专供” QQ:1002316308QQ:515102657
  • LMC662CM/NOPB图
  • 深圳市惊羽科技有限公司

     该会员已使用本站11年以上
  • LMC662CM/NOPB
  • 数量9328 
  • 厂家TI-德州仪器 
  • 封装SOP-8.贴片 
  • 批号▉▉:2年内 
  • ▉▉¥13.6元一有问必回一有长期订货一备货HK仓库
  • QQ:43871025QQ:43871025 复制
  • 131-4700-5145---Q-微-恭-候---有-问-秒-回 QQ:43871025
  • LMC662CM图
  • 深圳市恒达亿科技有限公司

     该会员已使用本站12年以上
  • LMC662CM
  • 数量5000 
  • 厂家NS 
  • 封装SOP 
  • 批号25+ 
  • 全新原装,公司现货销售!
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  • LMC662CM图
  • 深圳市恒达亿科技有限公司

     该会员已使用本站16年以上
  • LMC662CM
  • 数量3500 
  • 厂家NS 
  • 封装SOP8 
  • 批号25+ 
  • 全新原装现货特价销售!
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  • LMC662CM图
  • 上海熠富电子科技有限公司

     该会员已使用本站15年以上
  • LMC662CM
  • 数量9130 
  • 厂家NS 
  • 封装N/A 
  • 批号2024 
  • 上海原装现货库存,欢迎查询!
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  • 15821228847 QQ:2719079875QQ:2300949663
  • LMC662CMX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
  • LMC662CMX
  • 数量23000 
  • 厂家NS 
  • 封装SO8 
  • 批号24+ 
  • 原装现货假一赔十,可含长期供货!
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产品型号LMC662CM的概述

LMC662CM芯片概述 LMC662CM是一款高性能的双运算放大器,属于Linear Technology的产品系列,广泛应用于各种模拟信号处理场景。该芯片以其极低的静态功耗和高输入阻抗而受到工程师的青睐。为满足现代电子设备对小型化和高效能的需求,LMC662CM的设计充分考虑了这些方面,使其在市面上具备竞争力。 LMC662CM详细参数 LMC662CM的主要电气参数包括: - 工作电压:可以在±2V到±15V的双电源下工作,或单极性电源下工作。 - 增益带宽积:达到1MHz,在特定频率下能够提供够高的增益。 - 共模抑制比(CMRR):高达100dB,确保在严重共模信号干扰的环境下,信号仍能够可靠传输。 - 电源抑制比(PSRR):也达到100dB,让其在电源波动范围内更具稳定性。 - 输入阻抗:超过1MΩ,提供足够的隔离以不改变信号源特性。 - 输出驱动能力:能够输出高达10m...

产品型号LMC662CM的Datasheet PDF文件预览

April 1998  
LMC662  
CMOS Dual Operational Amplifier  
n Ultra low input bias current: 2 fA  
General Description  
n Input common-mode range includes V−  
n Operating range from +5V to +15V supply  
The LMC662 CMOS Dual operational amplifier is ideal for  
operation from a single supply. It operates from +5V to +15V  
and features rail-to-rail output swing in addition to an input  
common-mode range that includes ground. Performance  
limitations that have plagued CMOS amplifiers in the past  
are not a problem with this design. Input VOS, drift, and  
broadband noise as well as voltage gain into realistic loads  
(2 kand 600) are all equal to or better than widely ac-  
cepted bipolar equivalents.  
=
n ISS 400 µA/amplifier; independent of V+  
n Low distortion: 0.01% at 10 kHz  
n Slew rate: 1.1 V/µs  
n Available in extended temperature range (−40˚C to  
+125˚C); ideal for automotive applications  
n Available to a Standard Military Drawing specification  
This chip is built with National’s advanced Double-Poly  
Silicon-Gate CMOS process.  
Applications  
n High-impedance buffer or preamplifier  
n Precision current-to-voltage converter  
n Long-term integrator  
See the LMC660 datasheet for a Quad CMOS operational  
amplifier with these same features.  
n Sample-and-hold circuit  
n Peak detector  
n Medical instrumentation  
n Industrial controls  
Features  
n Rail-to-rail output swing  
n Specified for 2 kand 600loads  
n High voltage gain: 126 dB  
n Low input offset voltage: 3 mV  
n Low offset voltage drift: 1.3 µV/˚C  
n Automotive sensors  
Connection Diagram  
8-Pin DIP/SO  
DS009763-1  
Ordering Information  
Package  
Temperature Range  
NSC  
Transport  
Media  
Drawing  
Military  
Extended  
Industrial Commercial  
8-Pin  
LMC662AMJ/883  
J08A  
M08A  
N08E  
Rail  
Ceramic DIP  
8-Pin  
LMC662EM LMC662AIM LMC662CM  
LMC662EN LMC662AIN LMC662CN  
Rail,  
Tape and Reel  
Rail  
Small Outline  
8-Pin  
Molded DIP  
8-Pin  
Side Brazed  
Ceramic DIP  
LMC662AMD  
D08C  
Rail  
© 1999 National Semiconductor Corporation  
DS009763  
www.national.com  
Absolute Maximum Ratings (Note 3)  
ESD Tolerance (Note 8)  
1000V  
If Military/Aerospace specified devices are required,  
please contact the National Semiconductor Sales Office/  
Distributors for availability and specifications.  
Operating Ratings(Note 3)  
Temperature Range  
LMC662AMJ/883,  
LMC662AMD  
±
Differential Input Voltage  
Supply Voltage (V+ − V)  
Output Short Circuit to V+  
Output Short Circuit to V−  
Lead Temperature  
Supply Voltage  
16V  
−55˚C TJ +125˚C  
−40˚C TJ +85˚C  
0˚C TJ +70˚C  
−40˚C TJ +125˚C  
4.75V to 15.5V  
(Note 12)  
(Note 1)  
LMC662AI  
LMC662C  
LMC662E  
(Soldering, 10 sec.)  
260˚C  
Supply Voltage Range  
Power Dissipation  
Thermal Resistance (θJA) (Note 11)  
8-Pin Ceramic DIP  
8-Pin Molded DIP  
8-Pin SO  
Storage Temp. Range  
Voltage at Input/Output Pins  
Current at Output Pin  
Current at Input Pin  
−65˚C to +150˚C  
(V+) +0.3V, (V) −0.3V  
(Note 10)  
±
18 mA  
100˚C/W  
101˚C/W  
165˚C/W  
100˚C/W  
±
5 mA  
Current at Power Supply Pin  
Power Dissipation  
35 mA  
(Note 2)  
150˚C  
8-Pin Side Brazed Ceramic DIP  
Junction Temperature  
DC Electrical Characteristics  
+
=
=
Unless otherwise specified, all limits guaranteed for TJ 25˚C. Boldface limits apply at the temperature extremes. V  
5V,  
Units  
V0V, VCM 1.5V, VO 2.5V and RL 1M unless otherwise specified.  
=
=
=
>
Parameter  
Conditions  
Typ  
LMC662AMJ/883 LMC662AI LMC662C LMC662E  
(Note 4)  
LMC662AMD  
Limit  
Limit  
(Note 4)  
3
Limit  
(Note 4)  
6
Limit  
(Note 4)  
6
(Notes 4, 9)  
Input Offset Voltage  
1
3
mV  
max  
3.5  
3.3  
6.3  
6.5  
Input Offset Voltage  
Average Drift  
1.3  
µV/˚C  
Input Bias Current  
0.002  
0.001  
20  
100  
20  
pA  
max  
pA  
4
2
2
1
60  
60  
Input Offset Current  
100  
max  
TeraΩ  
dB  
>
Input Resistance  
Common Mode  
1
0V VCM 12.0V  
83  
70  
68  
70  
68  
63  
62  
63  
60  
V+ 15V  
min  
dB  
=
Rejection Ratio  
Positive Power Supply  
Rejection Ratio  
5V V+ 15V  
83  
70  
70  
63  
63  
=
VO 2.5V  
68  
68  
62  
60  
min  
dB  
Negative Power Supply  
Rejection Ratio  
0V V−10V  
94  
84  
84  
74  
74  
82  
83  
73  
70  
min  
V
Input Common-Mode  
Voltage Range  
V+ 5V & 15V  
=
−0.4  
V+ − 1.9  
2000  
500  
−0.1  
0
−0.1  
0
−0.1  
0
−0.1  
0
For CMRR 50 dB  
max  
V
V+ − 2.3  
V+ − 2.6  
400  
300  
180  
70  
V+ − 2.3  
V+ − 2.5  
440  
400  
180  
120  
220  
200  
100  
60  
V+ − 2.3  
V+ − 2.4  
300  
200  
90  
V+ − 2.3  
V+ − 2.6  
200  
100  
90  
min  
V/mV  
min  
V/mV  
min  
V/mV  
min  
V/mV  
min  
=
Large Signal  
Voltage Gain  
RL 2 k(Note 5)  
Sourcing  
Sinking  
80  
40  
=
RL 600(Note 5)  
1000  
200  
150  
100  
35  
150  
100  
50  
100  
75  
Sourcing  
Sinking  
50  
250  
40  
20  
www.national.com  
2
DC Electrical Characteristics (Continued)  
+
=
=
Unless otherwise specified, all limits guaranteed for TJ 25˚C. Boldface limits apply at the temperature extremes. V  
5V,  
Units  
V0V, VCM 1.5V, VO 2.5V and RL 1M unless otherwise specified.  
=
=
=
>
Parameter  
Conditions  
Typ  
(Note 4)  
LMC662AMJ/883 LMC662AI LMC662C LMC662E  
LMC662AMD  
Limit  
(Notes 4, 9)  
4.82  
4.77  
0.15  
0.19  
4.41  
4.24  
0.50  
0.63  
14.50  
14.40  
0.35  
0.43  
13.35  
13.02  
1.16  
1.42  
16  
Limit  
(Note 4)  
4.82  
4.79  
0.15  
0.17  
4.41  
4.31  
0.50  
0.56  
14.50  
14.44  
0.35  
0.40  
13.35  
13.15  
1.16  
1.32  
16  
Limit  
(Note 4)  
4.78  
4.76  
0.19  
0.21  
4.27  
4.21  
0.63  
0.69  
14.37  
14.32  
0.44  
0.48  
12.92  
12.76  
1.45  
1.58  
13  
Limit  
(Note 4)  
4.78  
4.70  
0.19  
0.25  
4.27  
4.10  
0.63  
0.75  
14.37  
14.25  
0.44  
0.55  
12.92  
12.60  
1.45  
1.75  
13  
V+ 5V  
4.87  
0.10  
4.61  
0.30  
14.63  
0.26  
13.90  
0.79  
22  
V
min  
V
=
Output Swing  
+
=
RL 2 kto V /2  
max  
V
V+ 5V  
=
+
=
RL 600to V /2  
min  
V
max  
V
V+ 15V  
=
+
=
RL 2 kto V /2  
min  
V
max  
V
V+ 15V  
=
+
=
RL 600to V /2  
min  
V
max  
mA  
min  
mA  
min  
mA  
min  
mA  
min  
mA  
max  
=
Sourcing, VO 0V  
Output Current  
V+ 5V  
12  
14  
11  
9
=
=
Sinking, VO 5V  
21  
16  
16  
13  
13  
12  
14  
11  
9
=
Output Current  
Sourcing, VO 0V  
40  
19  
28  
23  
23  
V+ 15V  
19  
25  
21  
15  
=
=
Sinking, VO 13V  
39  
19  
28  
23  
23  
(Note 12)  
19  
24  
20  
15  
Supply Current  
Both Amplifiers  
0.75  
1.3  
1.3  
1.6  
1.6  
=
VO 1.5V  
1.8  
1.5  
1.8  
1.9  
AC Electrical Characteristics  
+
=
=
5V,  
Unless otherwise specified, all limits guaranteed for TJ 25˚C. Boldface limits apply at the temperature extremes. V  
V0V, VCM 1.5V, VO 2.5V and RL 1M unless otherwise specified.  
=
=
=
>
Parameter  
Conditions  
Typ  
(Note  
4)  
LMC662AMJ/883  
LMC662AMD  
Limit  
LMC662AI  
LMC662C  
LMC662E  
Units  
Limit  
(Note 4)  
0.8  
Limit  
(Note 4)  
0.8  
Limit  
(Note 4)  
0.8  
(Notes 4, 9)  
0.8  
Slew Rate  
(Note 6)  
1.1  
V/µs  
min  
MHz  
Deg  
dB  
0.5  
0.6  
0.7  
0.4  
Gain-Bandwidth Product  
Phase Margin  
1.4  
50  
Gain Margin  
17  
Amp-to-Amp Isolation  
Input-Referred Voltage Noise  
(Note 7)  
130  
22  
dB  
=
=
=
F
F
F
1 kHz  
1 kHz  
10 kHz, AV −10  
Input-Referred Current Noise  
Total Harmonic Distortion  
0.0002  
=
=
=
RL 2 k, VO 8 VPP  
0.01  
%
V+ 15V  
=
3
www.national.com  
AC Electrical Characteristics (Continued)  
Note 1: Applies to both single-supply and split-supply operation. Continuous short circuit operation at elevated ambient temperature and/or multiple Op Amp shorts  
±
can result in exceeding the maximum allowed junction temperature of 150˚C. Output currents in excess of 30 mA over long term may adversely affect reliability.  
=
D
Note 2: The maximum power dissipation is a function of T  
(T –T )/θ  
, θ , and T . The maximum allowable power dissipation at any ambient temperature is P  
J(max) JA  
A
.
JA  
J(max)  
A
Note 3: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is in-  
tended to be functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics. The  
guaranteed specifications apply only for the test conditions listed.  
Note 4: Typical values represent the most likely parametric norm. Limits are guaranteed by testing or correlation.  
+
=
=
=
7.5V and R connected to 7.5V. For Sourcing tests, 7.5V V 11.5V. For Sinking tests, 2.5V V 7.5V.  
Note 5:  
Note 6:  
V
V
15V, V  
CM  
L
O
O
+
15V. Connected as Voltage Follower with 10V step input. Number specified is the slower of the positive and negative slew rates.  
+
+
=
=
=
13 V  
O PP  
Note 7: Input referred. V  
15V and R  
10 kconnected to V /2. Each amp excited in turn with 1 kHz to produce V  
.
L
Note 8: Human body model, 1.5 kin series with 100 pF.  
Note 9: A military RETS electrical test specification is available on request. At the time of printing, the LMC662AMJ/883 RETS spec complied fully with the boldface  
limits in this column. The LMC662AMJ/883 may also be procured to a Standard Military Drawing specification.  
=
Note 10: For operating at elevated temperatures the device must be derated based on the thermal resistance θ with P  
(T –T )/θ .  
J A JA  
JA  
D
Note 11: All numbers apply for packages soldered directly into a PC board.  
+
+
Note 12: Do not connect output to V when V is greater than 13V or reliability may be adversely affected.  
=
=
±
Typical Performance Characteristics VS  
7.5V, TA 25˚C unless otherwise specified  
Supply Current vs  
Supply Voltage  
Input Bias Current  
Offset Voltage  
DS009763-26  
DS009763-25  
DS009763-24  
Output Characteristics  
Current Sinking  
Output Characteristics  
Current Sourcing  
Input Voltage Noise  
vs Frequency  
DS009763-27  
DS009763-28  
DS009763-29  
www.national.com  
4
=
=
±
Typical Performance Characteristics VS  
7.5V, TA 25˚C unless otherwise specified (Continued)  
CMRR vs Frequency  
Open-Loop Frequency  
Response  
Frequency Response vs  
Capacitive Load  
DS009763-30  
DS009763-31  
DS009763-32  
Non-Inverting Large Signal  
Pulse Response  
Stability vs  
Capacitive Load  
Stability vs  
Capacitive Load  
DS009763-33  
DS009763-34  
DS009763-35  
Note: Avoid resistive loads of less than 500,  
as they may cause instability.  
Note: Avoid resistive loads of less than 500,  
as they may cause instability.  
Application Hints  
AMPLIFIER TOPOLOGY  
The topology chosen for the LMC662, shown in Figure 1, is  
unconventional (compared to general-purpose op amps) in  
that the traditional unity-gain buffer output stage is not used;  
instead, the output is taken directly from the output of the in-  
tegrator, to allow rail-to-rail output swing. Since the buffer  
traditionally delivers the power to the load, while maintaining  
high op amp gain and stability, and must withstand shorts to  
either rail, these tasks now fall to the integrator.  
As a result of these demands, the integrator is a compound  
affair with an embedded gain stage that is doubly fed forward  
(via Cf and Cff) by a dedicated unity-gain compensation  
driver. In addition, the output portion of the integrator is a  
push-pull configuration for delivering heavy loads. While  
sinking current the whole amplifier path consists of three  
gain stages with one stage fed forward, whereas while  
sourcing the path contains four gain stages with two fed  
forward.  
DS009763-4  
FIGURE 1. LMC662 Circuit Topology (Each Amplifier)  
The large signal voltage gain while sourcing is comparable  
to traditional bipolar op amps, even with a 600load. The  
gain while sinking is higher than most CMOS op amps, due  
to the additional gain stage; however, under heavy load  
(600) the gain will be reduced as indicated in the Electrical  
Characteristics.  
5
www.national.com  
the following value of feedback capacitor is recommended:  
Application Hints (Continued)  
COMPENSATING INPUT CAPACITANCE  
The high input resistance of the LMC662 op amps allows the  
use of large feedback and source resistor values without los-  
ing gain accuracy due to loading. However, the circuit will be  
especially sensitive to its layout when these large-value re-  
sistors are used.  
If  
Every amplifier has some capacitance between each input  
and AC ground, and also some differential capacitance be-  
tween the inputs. When the feedback network around an  
amplifier is resistive, this input capacitance (along with any  
additional capacitance due to circuit board traces, the  
socket, etc.) and the feedback resistors create a pole in the  
feedback path. In the following General Operational Amplifier  
Circuit, Figure 2, the frequency of this pole is  
the feedback capacitor should be:  
Note that these capacitor values are usually significantly  
smaller than those given by the older, more conservative for-  
mula:  
where CS is the total capacitance at the inverting input, in-  
cluding amplifier input capacitance and any stray capaci-  
tance from the IC socket (if one is used), circuit board traces,  
etc., and RP is the parallel combination of RF and RIN. This  
formula, as well as all formulae derived below, apply to in-  
verting and non-inverting op-amp configurations.  
When the feedback resistors are smaller than a few k, the  
frequency of the feedback pole will be quite high, since CS is  
generally less than 10 pF. If the frequency of the feedback  
pole is much higher than the “ideal” closed-loop bandwidth  
(the nominal closed-loop bandwidth in the absence of CS),  
the pole will have a negligible effect on stability, as it will add  
only a small amount of phase shift.  
DS009763-6  
However, if the feedback pole is less than approximately 6 to  
10 times the “ideal” −3 dB frequency, a feedback capacitor,  
CF, should be connected between the output and the invert-  
ing input of the op amp. This condition can also be stated in  
terms of the amplifier’s low-frequency noise gain: To main-  
tain stability, a feedback capacitor will probably be needed if  
C
consists of the amplifier’s input capacitance plus any stray capacitance  
S
from the circuit board and socket. C compensates for the pole caused by  
F
C
and the feedback resistor.  
S
FIGURE 2. General Operational Amplifier Circuit  
Using the smaller capacitors will give much higher band-  
width with little degradation of transient response. It may be  
necessary in any of the above cases to use a somewhat  
larger feedback capacitor to allow for unexpected stray ca-  
pacitance, or to tolerate additional phase shifts in the loop, or  
excessive capacitive load, or to decrease the noise or band-  
width, or simply because the particular circuit implementa-  
tion needs more feedback capacitance to be sufficiently  
stable. For example, a printed circuit board’s stray capaci-  
tance may be larger or smaller than the breadboard’s, so the  
actual optimum value for CF may be different from the one  
estimated using the breadboard. In most cases, the value of  
CF should be checked on the actual circuit, starting with the  
computed value.  
where  
is the amplifier’s low-frequency noise gain and GBW is the  
amplifier’s gain bandwidth product. An amplifier’s  
low-frequency noise gain is represented by the formula  
CAPACITIVE LOAD TOLERANCE  
Like many other op amps, the LMC662 may oscillate when  
its applied load appears capacitive. The threshold of oscilla-  
tion varies both with load and circuit gain. The configuration  
most sensitive to oscillation is a unity-gain follower. See the  
Typical Performance Characteristics.  
regardless of whether the amplifier is being used in an invert-  
ing or non-inverting mode. Note that a feedback capacitor is  
more likely to be needed when the noise gain is low and/or  
the feedback resistor is large.  
If the above condition is met (indicating a feedback capacitor  
will probably be needed), and the noise gain is large enough  
that:  
The load capacitance interacts with the op amp’s output re-  
sistance to create an additional pole. If this pole frequency is  
sufficiently low, it will degrade the op amp’s phase margin so  
that the amplifier is no longer stable at low gains. As shown  
in Figure 3, the addition of a small resistor (50to 100) in  
series with the op amp’s output, and a capacitor (5 pF to 10  
pF) from inverting input to output pins, returns the phase  
www.national.com  
6
ures 6, 7, 8 for typical connections of guard rings for stan-  
dard op-amp configurations. If both inputs are active and at  
high impedance, the guard can be tied to ground and still  
provide some protection; see Figure 9.  
Application Hints (Continued)  
margin to  
a
safe value without interfering with  
lower-frequency circuit operation. Thus, larger values of ca-  
pacitance can be tolerated without oscillation. Note that in all  
cases, the output will ring heavily when the load capacitance  
is near the threshold for oscillation.  
DS009763-5  
FIGURE 3. Rx, Cx Improve Capacitive Load Tolerance  
Capacitive load driving capability is enhanced by using a pull  
up resistor to V+ Figure 4. Typically a pull up resistor con-  
ducting 500 µA or more will significantly improve capacitive  
load responses. The value of the pull up resistor must be de-  
termined based on the current sinking capability of the ampli-  
fier with respect to the desired output swing. Open loop gain  
of the amplifier can also be affected by the pull up resistor  
(see Electrical Characteristics).  
DS009763-16  
FIGURE 5. Example, using the LMC660,  
of Guard Ring in P.C. Board Layout  
DS009763-23  
FIGURE 4. Compensating for Large Capacitive Loads  
with a Pull Up Resistor  
DS009763-17  
PRINTED-CIRCUIT-BOARD LAYOUT  
FOR HIGH-IMPEDANCE WORK  
FIGURE 6. Guard Ring Connections: Inverting  
Amplifier  
It is generally recognized that any circuit which must operate  
with less than 1000 pA of leakage current requires special  
layout of the PC board. When one wishes to take advantage  
of the ultra-low bias current of the LMC662, typically less  
than 0.04 pA, it is essential to have an excellent layout. For-  
tunately, the techniques for obtaining low leakages are quite  
simple. First, the user must not ignore the surface leakage of  
the PC board, even though it may sometimes appear accept-  
ably low, because under conditions of high humidity or dust  
or contamination, the surface leakage will be appreciable.  
DS009763-18  
To minimize the effect of any surface leakage, lay out a ring  
of foil completely surrounding the LMC662’s inputs and the  
terminals of capacitors, diodes, conductors, resistors, relay  
terminals, etc. connected to the op-amp’s inputs. See Figure  
5. To have a significant effect, guard rings should be placed  
on both the top and bottom of the PC board. This PC foil  
must then be connected to a voltage which is at the same  
voltage as the amplifier inputs, since no leakage current can  
flow between two points at the same potential. For example,  
a PC board trace-to-pad resistance of 1012, which is nor-  
mally considered a very large resistance, could leak 5 pA if  
the trace were a 5V bus adjacent to the pad of an input. This  
would cause a 100 times degradation from the LMC662’s ac-  
tual performance. However, if a guard ring is held within  
5 mV of the inputs, then even a resistance of 1011would  
cause only 0.05 pA of leakage current, or perhaps a minor  
(2:1) degradation of the amplifier’s performance. See Fig-  
FIGURE 7. Guard Ring Connections: Non-Inverting  
Amplifier  
DS009763-19  
FIGURE 8. Guard Ring Connections: Follower  
7
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BIAS CURRENT TESTING  
Application Hints (Continued)  
The test method of Figure 11 is appropriate for bench-testing  
bias current with reasonable accuracy. To understand its op-  
eration, first close switch S2 momentarily. When S2 is  
opened, then  
DS009763-20  
FIGURE 9. Guard Ring Connections: Howland Current  
Pump  
The designer should be aware that when it is inappropriate  
to lay out a PC board for the sake of just a few circuits, there  
is another technique which is even better than a guard ring  
on a PC board: Don’t insert the amplifier’s input pin into the  
board at all, but bend it up in the air and use only air as an in-  
sulator. Air is an excellent insulator. In this case you may  
have to forego some of the advantages of PC board con-  
struction, but the advantages are sometimes well worth the  
effort of using point-to-point up-in-the-air wiring. See Figure  
10.  
DS009763-22  
FIGURE 11. Simple Input Bias Current Test Circuit  
A suitable capacitor for C2 would be a 5 pF or 10 pF silver  
mica, NPO ceramic, or air-dielectric. When determining the  
magnitude of Ib−, the leakage of the capacitor and socket  
must be taken into account. Switch S2 should be left shorted  
most of the time, or else the dielectric absorption of the ca-  
pacitor C2 could cause errors.  
Similarly, if S1 is shorted momentarily (while leaving S2  
shorted)  
where Cx is the stray capacitance at the + input.  
DS009763-21  
(Input pins are lifted out of PC board and soldered directly to components.  
All other pins connected to PC board.)  
FIGURE 10. Air Wiring  
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8
Typical Single-Supply Applications (V+ 5.0 VDC  
)
=
Additional single-supply applications ideas can be found in  
the LM358 datasheet. The LMC662 is pin-for-pin compatible  
with the LM358 and offers greater bandwidth and input resis-  
tance over the LM358. These features will improve the per-  
formance of many existing single-supply applications. Note,  
however, that the supply voltage range of the LM662 is  
smaller than that of the LM358.  
Sine-Wave Oscillator  
Low-Leakage Sample-and-Hold  
DS009763-15  
DS009763-8  
Instrumentation Amplifier  
Oscillator frequency is determined by R1, R2, C1, and C2:  
=
fOSC 1/2πRC  
=
=
=
=
where R R1 R2 and C C1 C2.  
This circuit, as shown, oscillates at 2.0 kHz with  
peak-to-peak output swing of 4.5V  
a
1 Hz Square-Wave Oscillator  
DS009763-7  
DS009763-9  
Power Amplifier  
For good CMRR over temperature, low drift resistors should  
be used. Matching of R3 to R6 and R4 to R7 affects CMRR.  
Gain may be adjusted through R2. CMRR may be adjusted  
through R7.  
DS009763-10  
9
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Typical Single-Supply Applications (V+ 5.0 VDC) (Continued)  
=
10 Hz Bandpass Filter  
10 Hz High-Pass Filter  
DS009763-12  
=
=
f
d
10 Hz  
0.895  
c
DS009763-11  
=
=
f
Q
10 Hz  
2.1  
=
Gain  
1
O
2 dB passband ripple  
=
Gain −8.8  
1 Hz Low-Pass Filter  
(Maximally Flat, Dual Supply Only)  
High Gain Amplifier with  
Offset Voltage Reduction  
DS009763-13  
DS009763-14  
=
Gain −46.8  
Output offset voltage reduced to the level of the input offset voltage of the  
bottom amplifier (typically 1 mV).  
www.national.com  
10  
Physical Dimensions inches (millimeters) unless otherwise noted  
Hermatic Dual-In-Line Pkg. (D)  
Order Number LMC662AMD  
NS Package Number D08C  
Ceramic Dual-In-Line Pkg. (J)  
Order Number LMC662AMJ/883  
NS Package Number J08A  
11  
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Physical Dimensions inches (millimeters) unless otherwise noted (Continued)  
Small Outline Dual-In-Line Pkg. (M)  
Order Number LMC662AIM, LMC662CM or LMC662EM  
NS Package Number M08A  
Molded Dual-In-Line Pkg. (N)  
Order Number LMC662AIN, LMC662CN or LMC662EN  
NS Package Number N08E  
www.national.com  
12  
Notes  
LIFE SUPPORT POLICY  
NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT  
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL  
COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein:  
1. Life support devices or systems are devices or  
systems which, (a) are intended for surgical implant  
into the body, or (b) support or sustain life, and  
whose failure to perform when properly used in  
accordance with instructions for use provided in the  
labeling, can be reasonably expected to result in a  
significant injury to the user.  
2. A critical component is any component of a life  
support device or system whose failure to perform  
can be reasonably expected to cause the failure of  
the life support device or system, or to affect its  
safety or effectiveness.  
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National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications.  
配单直通车
LMC662CM产品参数
型号:LMC662CM
是否Rohs认证: 不符合
生命周期:Transferred
IHS 制造商:NATIONAL SEMICONDUCTOR CORP
零件包装代码:SOIC
包装说明:SOP-8
针数:8
Reach Compliance Code:not_compliant
ECCN代码:EAR99
HTS代码:8542.33.00.01
风险等级:5.07
放大器类型:OPERATIONAL AMPLIFIER
架构:VOLTAGE-FEEDBACK
最大平均偏置电流 (IIB):0.000002 µA
25C 时的最大偏置电流 (IIB):0.000002 µA
最小共模抑制比:63 dB
标称共模抑制比:83 dB
频率补偿:YES
最大输入失调电压:6300 µV
JESD-30 代码:R-PDSO-G8
JESD-609代码:e0
长度:4.9 mm
低-偏置:YES
低-失调:NO
微功率:YES
湿度敏感等级:1
负供电电压上限:
标称负供电电压 (Vsup):
功能数量:2
端子数量:8
最高工作温度:70 °C
最低工作温度:
封装主体材料:PLASTIC/EPOXY
封装代码:SOP
封装等效代码:SOP8,.25
封装形状:RECTANGULAR
封装形式:SMALL OUTLINE
包装方法:RAIL
峰值回流温度(摄氏度):235
电源:5/15 V
认证状态:Not Qualified
座面最大高度:1.75 mm
最小摆率:0.8 V/us
标称压摆率:1.1 V/us
子类别:Operational Amplifier
最大压摆率:1.8 mA
供电电压上限:16 V
标称供电电压 (Vsup):5 V
表面贴装:YES
技术:CMOS
温度等级:COMMERCIAL
端子面层:Tin/Lead (Sn/Pb)
端子形式:GULL WING
端子节距:1.27 mm
端子位置:DUAL
处于峰值回流温度下的最长时间:30
标称均一增益带宽:1400 kHz
最小电压增益:50000
宽度:3.9 mm
Base Number Matches:1
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