
6
LTC7545A
TYPICAL APPLICATIONS N
U
Bipolar Operation (4-Quadrant Multiplication)
VDD VREF
LTC7545A
RFB
OUT1
DGND
AGND
3
2
17
16
4–15
18
5V OR 15V
VREF
–10V TO 10V
P
WR
CS
DB11–DB0
19
20
1
33pF
R1
10K
0.1
F
VOUT
7545A TA04
–
+
1/2LT1112
–
+
1/2LT1112
R2
20K
R3
20K
ANALOG OUTPUT
VOUT
Table 2. Bipolar Offset Binary Code Table
MSB
LSB
1111
VREF (2047/2048)
1000
0000
0001
V
REF
(1/2048)
1000
0000
0V
0111
1111
–V
REF
(1/2048)
0000
–VREF (2048/2048) = –V
REF
DIGITAL INPUT
BINARY NUMBER
IN DAC LATCH