
4
LTC8043
TI I G DIAGRA
U
W
SRI
LD
PREVIOUS
WORD
BIT 1
MSB
BIT 2
BIT 11
8043TD01
BIT 12
LSB
tDS
tDH
tCH
tSRI
tASB
tCL
tLD
CLK INPUT
TYPICAL APPLICATIONS N
U
Unipolar Operation (2-Quadrant Multiplication)
VDD VREF
LTC8043
RFB
GND
4
7
6
5
8
5V
VREF
–10V TO 10V
CLK
SRI
LD
1
2
3
IOUT
33pF
VOUT
LTC8043 TA03
–
+
LT1097
P
Table 1. Unipolar Binary Code Table
DIGITAL INPUT
BINARY NUMBER
IN DAC REGISTER
–VREF (4095/4096)
–VREF (2048/4096) = –VREF/2
–VREF (1/4096)
0V
0.1
F
MSB
LSB
1111 1111 1111
1000 0000 0000
0000 0000 0001
0000 0000 0000
ANALOG OUTPUT
VOUT
RELATED PARTS
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
LTC7541A
Parallel I/O Multiplying 12-Bit DAC
12-Bit Wide Input
LTC7543/LTC8143
Serial I/O Mulitplying 12-Bit DACs
Clear Pin and Serial Data Output (LTC8143)
7
6
5
5V
P
0.1
F
VDD VREF
LTC8043
RFB
GND
4
8
VREF
–10V TO 10V
CLK
SRI
LD
1
2
3
IOUT
VOUT
LTC8043 TA04
–
+
1/2 LT1112
Table 2. Bipolar Offset Binary Code Table
+VREF (2047/2048)
+VREF (1/2048)
0V
–VREF (1/2048)
–VREF (2048/2048) = –VREF
R3
20k
R1
10k
R2
20k
–
+
1/2 LT1112
DIGITAL INPUT
BINARY NUMBER
IN DAC REGISTER
MSB
LSB
1111 1111 1111
1000 0000 0001
1000 0000 0000
0111 1111 1111
0000 0000 0000
ANALOG OUTPUT
VOUT
33pF
Bipolar Operation (4-Quadrant Multiplication)
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 PRINTED IN USA
LINEAR TECHNOLOGY CORPORATION 1995