LTC8143_15 Datasheet, PDF (1/8 Pages) Linear Technology – Improved Industry Standard Serial 12-Bit Multiplying DACs

LTC7543/LTC8143
Improved Industry Standard
Serial 12-Bit Multiplying DACs
FEATURES
s _{Improved Direct Replacement for AD7543}
and DAC-8143
s _{Low Cost}
s _{DNL and INL Over Temperature: ±0.5LSB}
s _{Easy, Fast and Flexible Serial Interface}
s _{Daisy-Chain 3-Wire Interface for Multiple DAC}
Systems (LTC8143)
s _{1LSB Maximum Gain Error Over Temperature}
Eliminates Adjustment
s _{Asynchronous Clear Input for Initialization}
s _{Four-Quadrant Multiplication}
s _{Low Power Consumption}
s _{16-Pin PDIP and SO Packages}
U
APPLICATIONS
s _{Process Control and Industrial Automation}
s _{Remote Microprocessor-Controlled Systems}
s _{Digitally Controlled Filters and Power Supplies}
s _{Programmable Gain Amplifiers}
s _{Automatic Test Equipment}
DESCRIPTION
The LTC^®7543/LTC8143 are serial-input 12-bit multiply-
ing digital-to-analog converters (DACs). They are superior
pin compatible replacements for the AD7543 and
DAC-8143. Improvements include better accuracy, better
stability over temperature and supply variations, lower
sensitivity to output amplifier offset, tighter timing speci-
fications and lower output capacitance.
An easy-to-use serial interface includes an asynchronous
CLEAR input for systems requiring initialization to a known
state. The LTC8143 has a serial data output to allow daisy-
chaining multiple DACs on a 3-wire interface bus.
These DACs are extremely versatile. They can be used for
2-quadrant and 4-quadrant multiplying, programmable
gain and single supply applications, such as noninverting
voltage output and biased or offset ground mode.
Parts are available in 16-pin PDIP and SO packages and
are specified over the extended industrial temperature
range, – 40°C to 85°C.
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATION
Multiplying DAC Has Easy 3-Wire Serial Interface
V_IN
CLOCK
DATA
LOAD
5V
14 15 16
4 ^{VDD VREF}
STB1
R_FB
1
OUT 1
7 _{SRI LTC7543}
5 _LD1
LTC8143
OUT 2
DGND
AGND ²
12
3
33pF
–
LT^®1097
+
V_OUT
7543/8143 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
7543/8143 TA02
1