LTC7541A
Improved
Industry Standard CMOS
12-Bit Multiplying DAC
FEATURES
s
s
s
DESCRIPTION
The LTC
廬
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.
s
s
s
s
s
s
s
s
Improved Direct Replacement for AD7541A
and AD7541
4-Quadrant Multiplication
12-Bit End-Point Linearity:
鹵
0.5LSB DNL and INL
Over Temperature
All Grades Guaranteed Monotonic
Maximum Gain Error:
鹵
1LSB
Single 5V to 15V Supply
TTL and CMOS Logic Compatible
Reduced Sensitivity to Op Amp Offset
Low Power Consumption
Virtually Latch-Up Proof
Low Cost
APPLICATIONS
s
s
s
s
s
Motion Control Systems
Microprocessor-Controlled Calibration
Automatic Test Equipment
Programmable Gain Amplifiers
Digitally Controlled Filters
TYPICAL APPLICATION
2-Quadrant Multiplying DAC Has Less Than
0.5LSB (Typ) Total Unadjusted Error
V
IN
15V
Integral Nonlinearity Over Temperature
1.0
INTEGRAL NONLINEARITY (LSB)
0.1碌F
16
V
DD
17
V
REF
18
R
FB
1
OUT 1
33pF
0.5
T
A
= 85擄C
0
T
A
= 鈥?0擄C
鈥?.5
T
A
= 25擄C
LTC7541A
OUT 2
2
GND
4 TO 15
DIGITAL INPUTS
3
LT
廬
1097
V
OUT
7541 TA01
鈥?.0
0
512 1024 1536 2048 2560 3072 3584 4095
DIGITAL INPUT CODE
7541A TA02
U
+
next
1
2
3
4
