
4
LTC7541A
TYPICAL APPLICATIONS N
U
Unipolar Operation (2-Quadrant Multiplication)
RELATED PARTS
Bipolar Operation (4-Quadrant Multiplication)
VDD
VREF
LTC7541A
RFB
GND
3
4 TO 15
2
16
15V
VREF
– 10 TO 10V
17
18
1
OUT 1
33pF
R1
10k
VOUT
7541 TA04
OUT 2
–
+
0.1
F
1/2 LT1112
–
+
1/2 LT1112
DIGITAL INPUTS
Table 2. Bipolar Offset Binary Code Table
DIGITAL INPUT
VREF (2047/2048)
VREF (1/2048)
0V
–VREF (1/2048)
–VREF
MSB
LSB
1111 1111 1111
1000 0000 0001
1000 0000 0000
0111 1111 1111
0000 0000 0000
ANALOG OUTPUT
VOUT
R2
20k
R3
20k
VDD
VREF
LTC7541A
RFB
GND
3
4 TO 15
2
16
15V
VREF
– 10 TO 10V
17
18
1
OUT 1
33pF
VOUT
7541 TA03
OUT 2
–
+
0.1
F
LT1097
DIGITAL INPUTS
Table 1. Unipolar Binary Code Table
DIGITAL INPUT
–VREF (4095/4096)
–VREF (2048/4096) = –VREF/2
–VREF (1/4096)
0V
MSB
LSB
1111 1111 1111
1000 0000 0000
0000 0000 0001
0000 0000 0000
ANALOG OUTPUT
VOUT
PART NUMBER
DESCRIPTION
COMMENTS
LTC1257
Complete Serial I/O VOUT 12-Bit DAC
5V to 15V Single Supply in 8-Pin SO and PDIP
LTC1451/LTC1452/LTC1453
Complete Serial I/O VOUT 12-Bit DACs
3V/5V Single Supply in 8-Pin SO and PDIP
LTC7543/LTC8143
Serial I/O Muliplying 12-Bit DACs
Clear Pin, Serial Data Output (LTC8143)
LTC8043
Serial Mulitplying 12-Bit DAC
8-Pin SO and PDIP
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7487
(408) 432-1900 q FAX: (408) 434-0507 q TELEX: 499-3977
LT/GP 1195 6K PRINTED IN USA
LINEAR TECHNOLOGY CORPORATION 1995