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