LTC7545A Datasheet, PDF (1/8 Pages) Linear Technology – Improved Industry Standard Parallel 12-Bit Multiplying DAC

LTC7545A
Improved Industry Standard
Parallel 12-Bit Multiplying DAC
FEATURES
s _{Improved Direct Replacement for AD7545A}
and AD7545
s _{DNL and INL Over Temperature: ±0.5LSB}
s _{Gain Error: ±1LSB Maximum}
s _{4-Quadrant Multiplication}
s _{Single 5V or 15V Supply}
s _{Low Power Consumption}
s _{Low Cost}
APPLICATI S
s _{Process Control and Industrial Automation}
s _{Software Controlled Gain Adjustment}
s _{Digitally Controlled Filter and Power Supplies}
s _{Automatic Test Equipment}
DESCRIPTIO
The LTC^®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.
TYPICAL APPLICATI
2-Quadrant Multiplying DAC Has Less Than
0.5LSB (Typ) Total Unadjusted Error
V_IN
5V
0.1µF
18 19 20
V_DD V_REF
R_FB
OUT1
1
WR ¹⁷
CS ¹⁶
LTC7545A
AGND
DGND ²
4–15 3
33pF
–
LT^®1097
+
V_OUT
7545A TA01
Integral Nonlinearity Over Temperature
1.0
0.5
T_A = 85°C _{TA = 25°C}
0
T_A = –40°C
–0.5
–1.0
0
512 1024 1536 2048 2560 3072 3584 4095
DIGITAL INPUT CODE
7545A TA02
1