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产品型号LTC1458LCSW#TRPBF的概述

芯片LTC1458LCSWTRPBF的概述 LTC1458LCSW#TRPBF是一款由Analog Devices(阿纳特设备公司)生产的高精度、低功耗运算放大器。该芯片被广泛应用于信号处理、数据采集和精密测量等领域。由于其出色的性能参数和多种功能,LTC1458LCSW#TRPBF可以满足多种不同电路设计需求。 LTC1458LCSW#TRPBF具有较低的失真和噪音,非常适合用于音频信号处理和高精度传感器应用。它可以在单电源和双电源配置下工作,增强了其灵活性和适应性。此外,该芯片的宽工作电压范围和出色的温度系数确保其在多样化的环境下都能可靠工作。 芯片LTC1458LCSWTRPBF的详细参数 LTC1458LCSWTRPBF的主要技术参数如下: - 供电电压范围: 3V至30V(单电源)或±1.5V至±15V(双电源) - 工作温度范围: -40°C至+85°C - 增益带宽积: ...

产品型号LTC1458LCSW#TRPBF的Datasheet PDF文件预览

LTC1458/LTC1458L  
Quad 12-Bit Rail-to-Rail  
Micropower DACs  
U
DESCRIPTION  
FEATURES  
The LTC®1458/LTC1458L are complete single supply,  
quad rail-to-rail voltage output, 12-bit digital-to-analog  
converters(DACs)inSO-28andSSOP-28packages. They  
includeanoutputbufferamplifierwithvariablegain(×1or  
×2)andaneasy-to-use3-wirecascadableserialinterface.  
12-Bit Resolution  
Buffered True Rail-to-Rail Voltage Output  
5V Operation, ICC: 1.1mA Typ (LTC1458)  
3V Operation, ICC: 800µA Typ (LTC1458L)  
Built-In Reference: 2.048V (LTC1458)  
1.220V (LTC1458L)  
The LTC1458 has an onboard reference of 2.048V and a  
full-scale output of 4.095V in a ×2 gain configuration. It  
operates from a single 4.5V to 5.5V supply dissipating  
only 5.5mW (ICC = 1.1mA typ).  
CLR Pin  
Power-On Reset  
SSOP-28 Package  
3-Wire Cascadable Serial Interface  
Maximum DNL Error: 0.5LSB  
The LTC1458L has an onboard 1.22V reference and a full-  
scale output of 2.5V in a×2 gain configuration. It operates  
from a single supply of 2.7V to 5.5V dissipating 2.4mW.  
Low Cost  
U
APPLICATIONS  
Excellent DNL, low supply current and a wide range of  
built-in functions allow these parts to be used in a host of  
applications when flexibility, power and single supply  
operation are important.  
Digital Calibration  
Industrial Process Control  
Automatic Test Equipment  
Low Power Systems  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
U
TYPICAL APPLICATION  
Daisy-Chained Control Outputs  
Functional Block Diagram: Quad 12-Bit Rail-to-Rail DAC  
Differential Nonlinearity  
FROM µP  
2.048V (LTC1458)  
1.22V (LTC1458L)  
5V (LTC1458)  
3V TO 5V (LTC1458L)  
vs Input Code  
0.5  
0.4  
D
REFOUT  
CS/LD  
CLK  
V
IN  
CC  
REFHI C  
REFHI B  
0.3  
0.2  
V
0.1  
V
OUT C  
OUT B  
DAC C  
DAC B  
DAC A  
0
X1/X2 C  
REFLO C  
X1/X2 B  
REFLO B  
48-BIT  
–0.1  
–0.2  
–0.3  
–0.4  
–0.5  
SHIFT REGISTER  
AND  
REFHI D  
REFHI A  
DAC REGISTER  
V
V
OUT A  
OUT D  
DAC D  
X1/X2 A  
REFLO A  
X1/X2 D  
REFLO D  
512 1024 1536  
2048  
2560 4095  
3072 3584  
0
CODE  
1458 G09  
D
OUT  
CLR  
1458 BD01  
1
LTC1458/LTC1458L  
W W  
U W  
/O  
PACKAGE RDER I FOR ATIO  
ABSOLUTE MAXIMUM RATINGS  
VCC to GND .............................................. 0.5V to 7.5V  
TOP VIEW  
ORDER PART  
Logic Inputs to GND ................................ 0.5V to 7.5V  
1
2
28  
27 X1/X2 B  
26  
V
X1/X2 C  
CC  
NUMBER  
V
OUT C  
CS/LD  
V
OUT A, VOUT B, VOUT C, VOUT D  
,
3
V
OUT B  
X1/X2 A, X1/X2 B, X1/X2 C,  
4
25 CLR  
D
IN  
LTC1458CG  
5
24 REFHI B  
23 GND  
REFHI C  
GND  
X1/X2 D ......................................... 0.5V to VCC + 0.5V  
REFHI A, REFHI B, REFHI C, REFHI D,  
REFLO A, REFLO B, REFLO C,  
REFLO D ........................................ 0.5V to VCC + 0.5V  
Maximum Junction Temperature ......................... 125°C  
Operating Temperature Range  
LTC1458C/LTC1458LC .......................... 0°C to 70°C  
LTC1458I/LTC1458LI ...................... 40°C to 85°C  
Storage Temperature Range ................ 65°C to 150°C  
Lead Temperature (Soldering, 10 sec)................. 300°C  
LTC1458CSW  
LTC1458LCG  
LTC1458LCSW  
6
7
22 REFLO B  
21 REFLO A  
20 REFHI A  
19 REFOUT  
18 NC  
REFLO C  
REFLO D  
REFHI D  
8
9
10  
11  
12  
13  
14  
D
OUT  
CLK  
NC  
17  
16 X1/X2 A  
15  
V
OUT A  
V
OUT D  
V
X1/X2 D  
CC  
G PACKAGE  
SW PACKAGE  
28-LEAD PLASTIC SSOP  
28-LEAD PLASTIC SO WIDE  
TJMAX = 125°C, θJA = 100°C/W (G)  
JMAX = 125°C, θJA = 150°C/W (SW)  
T
Consult factory for Military grade parts.  
ELECTRICAL CHARACTERISTICS  
VCC = 4.5V to 5.5V (LTC1458), 2.7V to 5.5V (LTC1458L), X1/X2 = REFLO = GND, REFHI = REFOUT, VOUT unloaded, TA = TMIN to TMAX  
,
unless otherwise noted.  
SYMBOL PARAMETER  
CONDITIONS  
MIN  
TYP  
MAX  
UNITS  
DAC  
Resolution  
12  
Bits  
LSB  
DNL  
INL  
Differential Nonlinearity  
Guaranteed Monotonic (Note 1)  
±0.5  
Integral Nonlinearity  
T = 25°C  
(Note 1)  
±1.75  
±2.25  
±4.0  
±4.5  
LSB  
LSB  
A
V
OS  
V
OS  
V
FS  
Offset Error  
T = 25°C  
A
±3.0  
±6.0  
±12  
±18  
mV  
mV  
TC  
Offset Error Temperature  
Coefficient  
±15  
µV/°C  
Full-Scale Voltage  
When Using Internal Reference, LTC1458, T = 25°C  
4.065  
4.045  
4.095  
4.095  
4.125  
4.145  
V
V
A
LTC1458  
When Using Internal Reference, LTC1458L, T = 25°C  
2.470  
2.460  
2.500  
2.500  
2.530  
2.540  
V
V
A
LTC1458L  
V
FS  
TC  
Full-Scale Voltage  
Temperature Coefficient  
When Using Internal Reference  
± 24  
ppm/°C  
Reference  
Reference Output Voltage  
LTC1458  
LTC1458L  
2.008  
1.195  
2.048  
1.220  
2.088  
1.245  
V
V
Reference Output  
±20  
ppm/°C  
Temperature Coefficient  
Reference Line Regulation  
Reference Load Regulation  
0.7  
±2.0  
LSB/V  
0 I  
100µA, LTC1458  
0.2  
0.6  
1.5  
3.0  
LSB  
LSB  
OUT  
LTC1458L  
Reference Input Range  
V
V – 1.5V  
V /2  
CC  
V
REFHI  
CC  
Reference Input Resistance  
15  
24  
40  
kΩ  
2
LTC1458/LTC1458L  
ELECTRICAL CHARACTERISTICS  
VCC = 4.5V to 5.5V (LTC1458), 2.7V to 5.5V (LTC1458L), X1/X2 = REFLO = GND, REFHI = REFOUT, VOUT unloaded, TA = TMIN to TMAX  
,
unless otherwise noted.  
SYMBOL PARAMETER  
CONDITIONS  
MIN  
TYP  
15  
MAX  
UNITS  
pF  
Reference Input Capacitance  
Short-Circuit Current  
Power Supply  
REFOUT Shorted to GND  
45  
120  
mA  
V
Positive Supply Voltage  
For Specified Performance, LTC1458  
LTC1458L  
4.5  
2.7  
5.5  
5.5  
V
V
CC  
I
Supply Current  
4.5V V 5.5V (Note 4) , LTC1458  
1100  
800  
2400  
2000  
µA  
µA  
CC  
CC  
2.7V V 5.5V (Note 4), LTC1458L  
CC  
Op Amp DC Performance  
Short-Circuit Current Low  
V
V
Shorted to GND  
60  
70  
40  
120  
120  
120  
mA  
mA  
OUT  
OUT  
Short-Circuit Current High  
Output Impedance to GND  
Shorted to V  
CC  
Input Code = 0  
AC Performance  
Voltage Output Slew Rate  
Voltage Output Settling Time  
Digital Feedthrough  
(Note 2)  
0.5  
1.0  
14  
V/µs  
µs  
(Notes 2, 3) to ±0.5LSB  
0.3  
95  
85  
nV• s  
dB  
AC Feedthrough  
REFHI = 1kHz, 2V , (Code: All 0s)  
P-P  
SINAD  
Signal-to-Noise + Distortion  
REFHI = 1kHz, 2V , (Code: All 1s)  
dB  
P-P  
VCC = 5V (LTC1458), 3V (LTC1458L), TA = TMIN to TMAX  
LTC1458  
TYP  
LTC1458L  
TYP  
SYMBOL PARAMETER  
Digital I/O  
CONDITIONS  
MIN  
MAX  
MIN  
MAX  
UNITS  
V
V
V
V
Digital Input High Voltage  
Digital Input Low Voltage  
Digital Output High Voltage  
Digital Output Low Voltage  
Digital Input Leakage  
2.4  
2.0  
V
V
IH  
IL  
0.8  
0.6  
I
I
= 1mA  
= 1mA  
V
– 1.0  
V – 0.7  
CC  
V
OH  
OL  
OUT  
OUT  
CC  
0.4  
±10  
10  
0.4  
±10  
10  
V
I
V
= GND to V  
CC  
µA  
pF  
LEAK  
IN  
C
Digital Input Capacitance  
Guaranteed by Design,  
Not Subject to Test  
IN  
Switching  
t
t
t
t
t
t
t
t
t
D
D
Valid to CLK Setup  
Valid to CLK Hold  
40  
0
60  
0
ns  
ns  
ns  
ns  
ns  
ns  
ns  
ns  
ns  
1
2
3
4
5
6
7
8
9
IN  
IN  
CLK High Time  
40  
40  
50  
40  
20  
60  
60  
80  
60  
30  
CLK Low Time  
CS/LD Pulse Width  
LSB CLK to CS/LD  
CS/LD Low to CLK  
D
Output Delay  
C
= 15pF  
LOAD  
150  
220  
OUT  
CLK Low to CS/LD Low  
20  
30  
3
LTC1458/LTC1458L  
ELECTRICAL CHARACTERISTICS  
Note 2: Load is 5kin parallel with 100pF.  
The  
denotes specifications which apply over the full operating  
temperature range.  
Note 3: DAC switched between all 1s and the code corresponding to V  
OS  
for the part.  
Note 4: Digital inputs at 0V or V  
Note 1: Nonlinearity is defined from the first code that is greater than or  
equal to the maximum offset specification to code 4095 (full scale).  
.
CC  
U W  
TYPICAL PERFORMANCE CHARACTERISTICS  
LTC1458  
LTC1458  
Minimum Supply Headroom for  
Integral Nonlinearity (INL)  
Differential Nonlinearity (DNL)  
Full Output Swing vs Load Current  
0.5  
0.4  
1.4  
2.0  
1.6  
V  
< 1LSB  
OUT  
1.2  
1.0  
0.8  
0.6  
0.4  
0.2  
0
REFLO = GND  
X1/X2 = GND  
CODE: ALL 1's  
0.3  
1.2  
0.2  
0.8  
V
= 4.095V  
OUT  
0.1  
0.4  
0
0
–0.1  
–0.2  
–0.3  
–0.4  
–0.5  
–0.4  
–0.8  
–1.2  
–1.6  
–2.0  
0
2048  
3072 3584  
3584  
4095  
0
10  
15  
20  
25  
30  
512 1024 1536  
2560  
4095  
0
2048  
3072  
5
512 1024 1536  
2560  
LOAD CURRENT (mA)  
CODE  
CODE  
1458 G03  
1458 G09  
1458 G08  
Minimum Output Voltage vs  
Output Sink Current  
Output Swing vs Load Resistance  
Output Swing vs Load Resistance  
4.5  
4.0  
3.5  
3.0  
2.5  
2.0  
1.5  
1.0  
0.5  
0
4.5  
4.0  
3.5  
3.0  
2.5  
2.0  
1.5  
1.0  
0.5  
0
1000  
900  
800  
700  
600  
500  
400  
300  
200  
100  
0.1  
REFLO = GND  
X1/X2 = GND  
REFLO = GND  
X1/X2 = GND  
REFLO = GND  
X1/X2 = GND  
25°C  
125°C  
V
CC  
–55°C  
R
L
R
L
0
10  
15  
20  
25  
30  
5
10  
100  
1k  
10k  
10  
100  
1k  
10k  
OUTPUT SINK CURRENT (mA)  
LOAD RESISTANCE ()  
LOAD RESISTANCE ()  
1458 G05A  
1458 G06A  
1458 G04  
4
LTC1458/LTC1458L  
U W  
TYPICAL PERFORMANCE CHARACTERISTICS  
LTC1458  
Supply Current vs Temperature  
LTC1458 Full-Scale Voltage vs  
Temperature  
LTC1458  
Offset Voltage vs Temperature  
950  
4.110  
4.105  
4.100  
4.095  
4.090  
4.085  
4.080  
5
4
940  
930  
3
920  
910  
900  
890  
880  
870  
860  
850  
V
= 5.5V  
= 5V  
2
CC  
CC  
CC  
1
0
V
–1  
–2  
–3  
–4  
–5  
V
= 4.5V  
35  
–55  
5
65  
95  
125  
–25  
–55  
5
35  
65  
95  
125  
–25  
–55  
5
35  
65  
95  
125  
–25  
TEMPERATURE (°C)  
TEMPERATURE (°C)  
TEMPERATURE (°C)  
1458 G05  
1458 G06  
1458 G07  
U
U
U
PIN FUNCTIONS  
X1/X2 C, X1/X2 D,X1/X2 A, X1/X2 B (Pins 1, 14, 16, 27):  
The Input Pin that Sets the Gain for DAC C/D/A/B. When  
grounded the gain will be 2, i.e., output full-scale will be  
2 • REFHI. When connected to VOUT the gain will be 1, i.e.,  
output full-scale will be equal to REFHI.  
REFLO C, REFLO D, REFLO A, REFLO B, (Pins 7, 8, 21,  
22): The Bottom of the DAC Resistor Ladders for the  
DACs. These can be used to offset zero-scale above  
ground. REFLO should be connected to ground when no  
offset is required.  
VOUT C, VOUT D, VOUT A, VOUT B (Pins 2, 13, 17, 26): The  
Buffered DAC Outputs.  
DOUT (Pin 10): The Output of the Shift Register which  
Becomes Valid on the Rising Edge of the Serial Clock.  
CS/LD (Pin 3): The Serial Interface Enable and Load  
CLK (Pin 11): The Serial Interface Clock Input.  
Control Input.  
VCC (Pins 15, 28): The Positive Supply Input. 4.5V VCC  
5.5V (LTC1458), 2.7V VCC 5.5V (LTC1458L). Re-  
quires a bypass capacitor to ground.  
DIN (Pin 4): The Serial Data Input.  
REFHI C, REFHI D, REFHI A, REFHI B,(Pins 5, 9, 20, 24):  
The Inputs to the DAC Resistor Ladder for DAC C/D/A/B.  
REFOUT (Pin 19): The Output of the Internal Reference.  
GND (Pins 6, 23): Ground.  
CLR (Pin 25): The Clear Pin. Clears all DACs to zero-scale  
when pulled low.  
5
LTC1458/LTC1458L  
W
BLOCK DIAGRA  
X1/X2 C  
28  
1
V
CC  
LD  
LD  
12-BIT  
DAC C  
REGISTER  
12-BIT  
DAC B  
REGISTER  
V
2
3
DAC C  
DAC B  
X1/X2 B  
OUT C  
27  
26  
CS/LD  
V
OUT B  
POWER-ON  
RESET  
4
5
6
D
25 CLR  
IN  
REFHI C  
GND  
24 REFHI B  
23 GND  
REFLO C  
REFLO D  
REFHI D  
7
8
REFLO B  
22  
48-BIT SHIFT REGISTER  
21 REFLO A  
20 REFHI A  
9
LTC1458: 2.048V  
LTC1458L: 1.22V  
D
10  
11  
REFOUT  
19  
OUT  
CLK  
NC  
18 NC  
17  
12  
13  
V
OUT A  
12-BIT  
12-BIT  
DAC A  
DAC D  
V
DAC D  
DAC A  
16  
15  
X1/X2 A  
OUT D  
REGISTER  
REGISTER  
LD  
LD  
X1/X2 D  
14  
V
CC  
REFHI  
+
V
OUT  
REFLO  
X1/X2  
1458 BD  
6
LTC1458/LTC1458L  
W U  
W
TI I G DIAGRA  
t
t
2
t
t
t
7
9
1
6
CLK  
t
t
3
4
B0 D  
PREVIOUS WORD  
B11 A  
MSB  
B0 B  
LSB  
B11 C  
MSB  
B0 D  
LSB  
D
IN  
CS/LD  
t
t
5
8
B11 A  
PREVIOUS WORD  
B0 B  
B11 C  
B0 D  
PREVIOUS WORD  
B11 A  
CURRENT WORD  
B10 A  
PREVIOUS WORD  
D
OUT  
PREVIOUS WORD PREVIOUS WORD  
1458 TD  
U U  
DEFI ITIO S  
Resolution (n): Resolution is defined as the number of  
digital input bits, n. It defines the number of DAC output  
states (2n) that divide the full-scale range. The resolution  
does not imply linearity.  
The offset of the part is measured at the code that corre-  
sponds to the maximum offset specification:  
VOS = VOUT – [(Code)(VFS)/(2n – 1)]  
Least Significant Bit (LSB): One LSB is the ideal voltage  
difference between two successive codes.  
Full-Scale Voltage (VFS): This is the output of the DAC  
when all bits are set to 1.  
LSB = (VFS – VOS)/(2n – 1) = (VFS – VOS)/4095  
Nominal LSBs:  
Voltage Offset Error (VOS): The theoretical voltage at the  
output when the DAC is loaded with all zeros. The output  
amplifier can have a true negative offset, but because the  
partisoperatedfromasinglesupply, theoutputcannotgo  
below zero. If the offset is negative, the output will remain  
near 0V resulting in the transfer curve shown in Figure 1.  
LTC1458  
LSB = 4.095V/4095 = 1mV  
LTC1458L LSB = 2.5V/4095 = 0.610mV  
Integral Nonlinearity (INL): End-point INL is the maxi-  
mum deviation from a straight line passing through the  
end-points of the DAC transfer curve. Because the part  
operates from a single supply and the output cannot go  
below zero, the linearity is measured between full scale  
and the code corresponding to the maximum offset  
specification. The INL error at a given input code is  
calculated as follows:  
OUTPUT  
VOLTAGE  
0V  
NEGATIVE  
OFFSET  
DAC CODE  
1458 F01  
INL = [VOUT – VOS – (VFS – VOS)(code/4095)]/LSB  
VOUT = The output voltage of the DAC measured at  
the given input code  
Figure 1. Effect of Negative Offset  
7
LTC1458/LTC1458L  
U U  
DEFI ITIO S  
Differential Nonlinearity (DNL): DNL is the difference  
between the measured change and the ideal 1LSB change  
between any two adjacent codes. The DNL error between  
any two codes is calculated as follows:  
DigitalFeedthrough: Theglitchthatappearsattheanalog  
outputcausedbyACcouplingfromthedigitalinputswhen  
they change state. The area of the glitch is specified in  
(nV)(sec).  
DNL = (VOUT – LSB)/LSB  
VOUT = The measured voltage difference between  
two adjacent codes  
U
OPERATIO  
Serial Interface  
Reference  
The data on the DIN input is loaded into the shift register  
ontherisingedgeoftheclock. Dataisloadedasone48-bit  
word, DACAfirst, thenDACB, DACCandDACD. TheMSB  
is loaded first for each DAC. The DAC registers load the  
datafromtheshiftregisterwhenCS/LDispulledhigh. The  
CLK is disabled internally when CS/LD is high. Note: CLK  
must be low before CS/LD is pulled low to avoid an extra  
internal clock pulse.  
The LTC1458L has an internal reference of 1.22V with a  
full scale of 2.5V (gain of 2 configuration). The LTC1458  
includes an internal 2.048V reference, making 1LSB equal  
to 1mV (gain of 2 configuration). When the buffer gain is  
2, the external reference must be less than VCC/2 and be  
capable of driving the 15k minimum DAC resistor ladder.  
The external reference must always be less than  
VCC – 1.5V.  
The buffered output of the 48-bit shift register is available  
on the DOUT pin which swings from ground to VCC.  
Voltage Output  
The rail-to-rail buffered output of the LTC1458 family can  
source or sink 5mA when operating with a 5V supply over  
the entire operating temperature range while pulling to  
within 300mV of the positive supply voltage or ground.  
The output swings to within a few millivolts of either  
supply rail when unloaded and has an equivalent output  
resistance of 40when driving a load to the rails. The  
output can drive 1000pF without going into oscillation.  
Multiple LTC1458/LTC1458Ls may be daisy-chained to-  
getherbyconnectingtheDOUT pintotheDIN pinofthenext  
chip, while the CLK and CS/LD signals remain common to  
all chips in the daisy-chain. The serial data is clocked to all  
of the chips, then the CS/LD signal is pulled high to update  
all of them simultaneously.  
8
LTC1458/LTC1458L  
U
W U U  
APPLICATIONS INFORMATION  
Using Two DACs to Digitally Program the Full Scale  
and Offset of a Third  
2,500 for VCC = 5V, since DAC C is being operated in × 2  
mode for full rail-to-rail output swing.  
Figure 2 shows how to use one LTC1458 to make a 12-bit  
DAC with a digitally programmable full scale and offset.  
DAC A and DAC B are used to control the offset and full  
scale of DAC C. DAC A is connected in a ×1 configuration  
andcontrolstheoffsetofDACCbymovingREFLOCabove  
ground. The minimum value to which this offset can be  
programmed is 10mV. DAC B is connected in a × 2  
configuration and controls the full scale of DAC C by  
driving REFHI C. Note that the voltage at REFHI C must be  
lessthanorequaltoVCC/2,correspondingtoDACBscode  
The transfer characteristic is:  
V
OUTC = 2 • [DC • (2 • DB – DA) + DA] • REFOUT  
where REFOUT = The Reference Output  
DA = (DAC A Digital Code)/4096  
This sets the offset.  
DB = (DAC B Digital Code)/4096  
This sets the full scale.  
DC = (DAC C Digital Code)/4096  
V
CC  
X1/X2 C  
5V  
0.1µF  
X1/X2 B  
V
V
OUT C  
OUT  
V
CS/LD  
OUT B  
CLR  
REFHI B  
GND  
D
IN  
REFHI C  
GND  
LTC1458  
LTC1458L  
REFLO B  
REFLO A  
REFHI A  
REFOUT  
NC  
REFLO C  
REFLO D  
REFHI D  
500Ω  
D
OUT  
CLK  
NC  
V
OUT A  
X1/X2 A  
V
OUT D  
V
CC  
X1/X2 D  
1458 F02  
Figure 2  
9
LTC1458/LTC1458L  
U
PACKAGE DESCRIPTION Dimensions in inches (millimeters) unless otherwise noted.  
G Package  
28-Lead Plastic SSOP (0.209)  
(LTC DWG # 05-08-1640)  
0.397 – 0.407*  
(10.07 – 10.33)  
28 27 26 25 24 23 22 21 20 19 18  
16 15  
17  
0.301 – 0.311  
(7.65 – 7.90)  
5
7
8
1
2
3
4
6
9 10 11 12 13 14  
0.205 – 0.212**  
(5.20 – 5.38)  
0.068 – 0.078  
(1.73 – 1.99)  
0° – 8°  
0.0256  
(0.65)  
BSC  
0.005 – 0.009  
(0.13 – 0.22)  
0.022 – 0.037  
(0.55 – 0.95)  
0.002 – 0.008  
(0.05 – 0.21)  
0.010 – 0.015  
(0.25 – 0.38)  
*DIMENSIONS DO NOT INCLUDE MOLD FLASH. MOLD FLASH  
SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE  
**DIMENSIONS DO NOT INCLUDE INTERLEAD FLASH. INTERLEAD  
FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE  
G28 SSOP 0694  
10  
LTC1458/LTC1458L  
U
PACKAGE DESCRIPTION Dimensions in inches (millimeters) unless otherwise noted.  
SW Package  
28-Lead Plastic Small Outline (Wide 0.300)  
(LTC DWG # 05-08-1620)  
0.697 – 0.712*  
(17.70 – 18.08)  
28 27 26 25 24 23 22 21 20 19 18  
16 15  
17  
0.394 – 0.419  
(10.007 – 10.643)  
NOTE 1  
0.291 – 0.299**  
(7.391 – 7.595)  
2
3
5
7
8
9
10 11 12 13 14  
1
4
6
0.037 – 0.045  
(0.940 – 1.143)  
0.093 – 0.104  
(2.362 – 2.642)  
0.010 – 0.029  
(0.254 – 0.737)  
× 45°  
0° – 8° TYP  
0.050  
(1.270)  
TYP  
0.004 – 0.012  
(0.102 – 0.305)  
0.009 – 0.013  
NOTE 1  
(0.229 – 0.330)  
0.014 – 0.019  
(0.356 – 0.482)  
TYP  
0.016 – 0.050  
(0.406 – 1.270)  
NOTE:  
1. PIN 1 IDENT, NOTCH ON TOP AND CAVITIES ON THE BOTTOM OF PACKAGES ARE THE MANUFACTURING OPTIONS.  
THE PART MAY BE SUPPLIED WITH OR WITHOUT ANY OF THE OPTIONS  
S28 (WIDE) 0996  
*DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE  
**DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE  
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.  
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-  
tationthattheinterconnectionofitscircuitsasdescribedhereinwillnotinfringeonexistingpatentrights.  
11  
LTC1458/LTC1458L  
U
TYPICAL APPLICATION  
LTC1458: 4.5V TO 5.5V  
LTC1458L: 2.7V TO 5.5V  
V
X1/X2 C  
CC  
LTC1458: 0V TO 4.095V  
LTC1458L: 0V TO 2.5V  
0.1µF  
X1/X2 B  
V
OUT C  
LTC1458: 0V TO 4.095V  
LTC1458L: 0V TO 2.5V  
V
CS/LD  
OUT B  
µP  
CLR  
REFHI B  
GND  
D
IN  
REFHI C  
GND  
REFLO B  
REFLO A  
REFHI A  
REFOUT  
NC  
REFLO C  
REFLO D  
REFHI D  
LTC1458  
LTC1458L  
LTC1458: 2.048V  
LTC1458L: 1.22V  
D
OUT  
CLK  
NC  
LTC1458: 0V TO 4.095V  
LTC1458L: 0V TO 2.5V  
V
OUT A  
LTC1458: 0V TO 4.095V  
LTC1458L: 0V TO 2.5V  
X1/X2 A  
V
OUT D  
V
CC  
X1/X2 D  
1458 TA03  
RELATED PARTS  
PART NUMBER  
DESCRIPTION  
COMMENTS  
LTC1257  
Single 12-Bit V  
Reference Can Be Overdriven up to 12V, i.e., FS  
DAC, Full Scale: 2.048V, V : 4.75V to 15.75V,  
5V to 15V Single Supply, Complete V  
SO-8 Package  
DAC in  
OUT  
OUT  
CC  
= 12V  
MAX  
LTC1446/LTC1446L  
LTC1450/LTC1450L  
Dual 12-Bit Rail-to-Rail Output DACs in SO-8 Package  
LTC1446: V = 4.5V to 5.5V, V  
= 0V to 4.095V  
OUT  
CC  
LTC1446L: V = 2.7V to 5.5V, V  
= 0V to 2.5V  
CC  
OUT  
Single 12-Bit Rail-to-Rail Output DACs with Parallel Interface  
LTC1450: V = 4.5V to 5.5V, V  
= 0V to 4.095V  
OUT  
CC  
LTC1450L: V = 2.7V to 5.5V, V  
= 0V to 2.5V  
CC  
OUT  
LTC1451  
LTC1452  
Single Rail-to-Rail 12-Bit DAC, Full Scale: 4.095V, V : 4.5V to 5.5V  
Low Power, Complete V  
DAC in SO-8 Package  
OUT  
CC  
Single Rail-to-Rail 12-Bit V  
Multiplying DAC, V : 2.7V to 5.5V  
Low Power, Multiplying V  
Buffer Amplifier in SO-8 Package  
3V, Low Power, Complete V  
DAC with Rail-to-Rail  
DAC in SO-8 Package  
OUT  
OUT  
CC  
OUT  
LTC1453  
Single Rail-to-Rail 12-Bit V  
DAC, Full Scale: 2.5V, V : 2.7V to 5.5V  
CC  
OUT  
LTC1454/LTC1454L  
Dual 12-Bit V  
DACs in SO-16 Package with Added Functionality  
LTC1454: V = 4.5V to 5.5V, V  
= 0V to 4.095V  
OUT  
OUT  
CC  
LTC1454L: V = 2.7V to 5.5V, V  
= 0V to 2.5V  
CC  
OUT  
LTC1456  
Single Rail-to-Rail Output 12-Bit DAC with Clear Pin,  
Low Power, Complete V  
with Clear Pin  
DAC in SO-8 Package  
OUT  
Full Scale: 4.095V, V : 4.5V to 5.5V  
CC  
14588lf LT/TP 0397 7K • PRINTED IN USA  
LINEAR TECHNOLOGY CORPORATION 1996  
12 Linear Technology Corporation  
1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408)432-1900  
FAX: (408) 434-0507 TELEX: 499-3977 www.linear-tech.com  
配单直通车
LTC1458LCSW#TRPBF产品参数
型号:LTC1458LCSW#TRPBF
Brand Name:Analog Devices Inc
是否无铅:含铅
是否Rohs认证:符合
生命周期:Active
IHS 制造商:ANALOG DEVICES INC
包装说明:SOP,
针数:28
制造商包装代码:05-08-1620 (SW28)
Reach Compliance Code:compliant
风险等级:5.06
Is Samacsys:N
最大模拟输出电压:1.245 V
最小模拟输出电压:1.195 V
转换器类型:D/A CONVERTER
输入位码:BINARY
输入格式:SERIAL
JESD-30 代码:R-PDSO-G28
JESD-609代码:e3
长度:17.89 mm
最大线性误差 (EL):0.1099%
湿度敏感等级:1
位数:12
功能数量:4
端子数量:28
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
封装形状:RECTANGULAR
封装形式:SMALL OUTLINE
峰值回流温度(摄氏度):250
认证状态:Not Qualified
座面最大高度:2.642 mm
标称安定时间 (tstl):14 µs
标称供电电压:5 V
表面贴装:YES
技术:CMOS
温度等级:COMMERCIAL
端子面层:MATTE TIN
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:NOT SPECIFIED
宽度:7.5 mm
Base Number Matches:1
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