TLC7528CNSR Datasheet, PDF (6/27 Pages) Texas Instruments – DUAL 8-BI MULTIPLYING DIGITAL-TO-ANALOG CONVERTERS

TLC7528C, TLC7528E, TLC7528I
DUAL 8ĆBIT MULTIPLYING
DIGITALĆTOĆANALOG CONVERTERS
SLAS062E − JANUARY 1987 − REVISED NOVEMBER 2008
PRINCIPLES OF OPERATION
The digital inputs of these devices provide TTL compatibility when operated from a supply voltage of 5V. These
devices can operate with any supply voltage in the range from 5V to 15V; however, input logic levels are not
TTL-compatible above 5V.
REFA
R
R
R
2R
2R
2R
S1
S2
S3
2R 2R
S8
RFB
RFBA
OUTA
AGND
DACA Data Latches and Drivers
Figure 1. Simplified Functional Circuit for DACA
R
REFA
I
256
IIkg
RFB
RFBA
OUTA
COUT
AGND
Figure 2. TLC7528 Equivalent Circuit, DACA Latch Loaded With 11111111
MODE SELECTION TABLE
DACA/DACB CS WR DACA DACB
L
L L Write Hold
H
L L Hold Write
X
H X Hold Hold
X
X H Hold Hold
L = low level, H = high level, X = don’t care
6
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