LTC7545A
Improved Industry Standard
Parallel 12-Bit Multiplying DAC
FEATURES
s
s
s
s
s
s
s
DESCRIPTIO
Improved Direct Replacement for AD7545A
and AD7545
DNL and INL Over Temperature:
卤0.5LSB
Gain Error:
卤1LSB
Maximum
4-Quadrant Multiplication
Single 5V or 15V Supply
Low Power Consumption
Low Cost
The LTC
庐
7545A is a 12-bit multiplying digital-to-analog
converter (DAC) with a microprocessor compatible paral-
lel input. It is a superior pin compatible replacement for the
industry standard AD7545A and AD7545. Improvements
include better accuracy, better stability over temperature
and supply variations and lower sensitivity to output
amplifier offset.
This very versatile DAC is useful for 2-quadrant and
4-quadrant multiplying, programmable gain and filtering
and single supply noninverting voltage output operation.
Parts are available in 20-pin PDIP and SO packages and
commercial and industrial temperature grades.
, LTC and LT are registered trademarks of Linear Technology Corporation.
APPLICATI
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s
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S
Process Control and Industrial Automation
Software Controlled Gain Adjustment
Digitally Controlled Filter and Power Supplies
Automatic Test Equipment
TYPICAL APPLICATI
2-Quadrant Multiplying DAC Has Less Than
0.5LSB (Typ) Total Unadjusted Error
V
IN
5V
0.1碌F
Integral Nonlinearity Over Temperature
1.0
INTEGRAL NONLINEARITY (LSB)
18
19
20
R
FB
1
OUT1
33pF
0.5
T
A
= 85掳C
0
T
A
= 鈥?0掳C
鈥?.5
T
A
= 25掳C
CS
16
AGND
2
DGND
4鈥?5
3
+
WR
17
LTC7545A
鈥?/div>
V
DD
V
REF
LT
庐
1097
V
OUT
7545A TA01
鈥?.0
0
512 1024 1536 2048 2560 3072 3584 4095
DIGITAL INPUT CODE
7545A TA02
U
UO
UO
1
1
2
3
4
5
6
7
8