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Linear Technology - Improved Industry Standard CMOS 12-Bit Multiplying DAC

Numéro de référence LTC7541A
Description Improved Industry Standard CMOS 12-Bit Multiplying DAC
Fabricant Linear Technology 
Logo Linear Technology 





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LTC7541A fiche technique
FEATURES
s Improved Direct Replacement for AD7541A
and AD7541
s 4-Quadrant Multiplication
s 12-Bit End-Point Linearity: ±0.5LSB DNL and INL
Over Temperature
s All Grades Guaranteed Monotonic
s Maximum Gain Error: ±1LSB
s Single 5V to 15V Supply
s TTL and CMOS Logic Compatible
s Reduced Sensitivity to Op Amp Offset
s Low Power Consumption
s Virtually Latch-Up Proof
s Low Cost
U
APPLICATIONS
s Motion Control Systems
s Microprocessor-Controlled Calibration
s Automatic Test Equipment
s Programmable Gain Amplifiers
s Digitally Controlled Filters
LTC7541A
Improved
Industry Standard CMOS
12-Bit Multiplying DAC
DESCRIPTION
The LTC®7541A is a 12-bit resolution multiplying digital-
to-analog converter (DAC).
Laser-trimmed thin-film resistors provide excellent abso-
lute accuracy. Precision matched resistors and CMOS
circuitry result in remarkable stability with temperature
and supply variations.
The LTC7541A is a superior pin compatible replacement
for the industry standard AD7541A/AD7541. Improve-
ments include better typical accuracy and stability and
reduced sensitivity to output amplifier offset. The LTC7541A
is also very resistant to latch-up.
In addition to 2-quadrant and 4-quadrant multiplying
configurations, the LTC7541A performs well in digitally
programmable gain and noninverting voltage output ap-
plications. Low cost, improved performance and versatil-
ity make the LTC7541A the best choice for many new
designs and for upgrading existing systems. Parts are
available in 18-pin PDIP and 18-pin SO Wide packages.
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATION
2-Quadrant Multiplying DAC Has Less Than
0.5LSB (Typ) Total Unadjusted Error
VIN
15V
0.1µF
16 17
VDD VREF
18
RFB 1
OUT 1
LTC7541A
4 TO 15
OUT 2
GND 2
3
DIGITAL INPUTS
33pF
LT®1097
+
VOUT
7541 TA01
Integral Nonlinearity Over Temperature
1.0
0.5
TA = 85°C TA = 25°C
0
TA = –40°C
–0.5
–1.0
0
512 1024 1536 2048 2560 3072 3584 4095
DIGITAL INPUT CODE
7541A TA02
1

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