LTC7541A Linear Technology, LTC7541A Datasheet
LTC7541A
Manufacturer Part Number
LTC7541A
Description
Improved Industry Standard CMOS 12-Bit Multiplying DAC
Manufacturer
Linear Technology
Datasheet
1.LTC7541A.pdf
(4 pages)
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APPLICATIONS
FEATURES
TYPICAL
V
IN
Improved Direct Replacement for AD7541A
and AD7541
4-Quadrant Multiplication
12-Bit End-Point Linearity: 0.5LSB DNL and INL
Over Temperature
All Grades Guaranteed Monotonic
Maximum Gain Error: 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
Motion Control Systems
Microprocessor-Controlled Calibration
Automatic Test Equipment
Programmable Gain Amplifiers
Digitally Controlled Filters
0.1 F
DIGITAL INPUTS
2-Quadrant Multiplying DAC Has Less Than
15V
V
4 TO 15
DD
16
0.5LSB (Typ) Total Unadjusted Error
APPLICATION
LTC7541A
V
REF
17
U
GND
R
FB
OUT 1
OUT 2
18
3
1
2
33pF
U
–
+
LT
®
1097
7541 TA01
V
OUT
DESCRIPTION
The LTC
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.
Industry Standard CMOS
®
12-Bit Multiplying DAC
7541A is a 12-bit resolution multiplying digital-
–0.5
–1.0
1.0
0.5
Integral Nonlinearity Over Temperature
0
0
512
U
T
A
1024
= 85 C
DIGITAL INPUT CODE
1536
T
A
T
2048
= 25 C
A
= –40 C
2560
Improved
3072
LTC7541A
3584
7541A TA02
4095
1
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LTC7541A Summary of contents
Page 1
... 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. ...
Page 2
... REF LTC7541ABN LTC7541ABSW 4 BIT 12 (LSB) 15 LTC7541AJN 5 14 BIT 11 LTC7541AKN 6 BIT 10 13 LTC7541AJSW 7 12 BIT 9 LTC7541AKSW 8 11 BIT BIT 7 SW PACKAGE 18-LEAD PLASTIC SO WIDE = 150 C, = 100 150 C, = 130 C/ W (SW) JA LTC7541AJ LTC7541AK/LTC7541AB TYP MAX MIN TYP MAX ...
Page 3
... LT1363 as output amplifier. with all digital 20k 20k 40k 40k 40k 40k 40k DECODER TTL/DTL/CMOS COMPATIBLE DIGITAL INPUTS • • • • BIT 1 BIT 2 BIT 3 BIT 4 (MSB) LTC7541A ALL GRADES MIN TYP MAX 100 2.4 0.8 0.001 1 8 100 1000 1 ...
Page 4
... Bipolar Operation (4-Quadrant Multiplication 33pF V R REF FB 1 – OUT 1 LTC7541A 1/2 LT1112 + OUT 2 2 GND 3 Table 2. Bipolar Offset Binary Code Table ANALOG OUTPUT DIGITAL INPUT V OUT MSB LSB 1111 1111 1111 ...