TLC7628C_16 Datasheet, PDF (9/18 Pages) Texas Instruments – DUAL 8-BIT MULTIPLYING DIGITAL-TO-ANALOG CONVERTER

TLC7628C
DUAL 8ĆBIT MULTIPLYING
SLAS063B − APRIL 1989 − REVISED MARCH 2007
PRINCIPLES OF OPERATION
Table 1. 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
Table 2. Unipolar Binary Code
DAC LATCH CONTENTS
(see Note 7 )
MSB
LSB
ANALOG OUTPUT
11111111
10000001
10000000
01111111
00000001
00000000
−VI (255/256)
−VI (129/256)
−VI (128/256) = − Vi /2
−VI (127/256)
−VI (1/256)
−VI (0/256) = 0
NOTES: 7. 1 LSB = (2 ^{− 8)VI}
8. 1 LSB = (2 ^{− 7)VI}
Table 3. Bipolar (Offset Binary) Code
DAC LATCH CONTENTS
(see Note 8)
MSB
LSB
ANALOG OUTPUT
11111111
10000001
10000000
01111111
00000001
00000000
VI (127/128)
VI (1/128)
0V
−VI (1/128)
−VI (127/128)
−VI (128/128)
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