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