Datasheet

15
LTC1591/LTC1597
15917fa
APPLICATIONS INFORMATION
WUU
U
Figure 2a. Bipolar Operation (4-Quadrant Multiplication) V
OUT
= –V
REF
to V
REF
Figure 2b. Bipolar Operation (4-Quadrant Multiplication) V
OUT
= –V
REF
to V
REF
V
CC
LTC1591-1
R
FB
R
FB
R
OFS
R
OFS
5V
LD
LD
3
2
98
28
23
7
22
R1
R
COM
1
REF
4
5
0.1μF
6
I
OUT1
33pF
V
OUT
=
–V
REF
TO V
REF
1591/97 F02a
AGND
DGND
–
+
1/2 LT1112
WR
10 TO 21,
24, 25
WR
CLR
CLR
V
REF
–
+
1/2 LT1112
14-BIT DAC
R1
R2
14
DATA
INPUTS
Bipolar Offset Binary Code Table
DIGITAL INPUT
BINARY NUMBER
IN DAC REGISTER
V
REF
(8,191/8,192)
V
REF
(1/8,192)
0V
–V
REF
(1/8,192)
–V
REF
LSB
1111 1111 11
0000 0000 01
0000 0000 00
1111 1111 11
0000 0000 00
ANALOG OUTPUT
V
OUT
MSB
1111
1000
1000
0111
0000
27
NC
26
NC
V
CC
LTC1597-1
R
FB
R
FB
R
OFS
R
OFS
5V
LD
LD
3
2
98
28
23
7
22
R1
R
COM
1
REF
4
5
0.1μF
6
I
OUT1
33pF
V
OUT
=
–V
REF
TO V
REF
1591/97 F02b
AGND
DGND
–
+
1/2 LT1112
WR
10 TO 21,
24 TO 27
WR
CLR
CLR
V
REF
–
+
1/2 LT1112
16-BIT DAC
R1
R2
16
DATA
INPUTS
Bipolar Offset Binary Code Table
DIGITAL INPUT
BINARY NUMBER
IN DAC REGISTER
V
REF
(32,767/32,768)
V
REF
(1/32,768)
0V
–V
REF
(1/32,768)
–V
REF
LSB
1111 1111 1111
0000 0000 0001
0000 0000 0000
1111 1111 1111
0000 0000 0000
ANALOG OUTPUT
V
OUT
MSB
1111
1000
1000
0111
0000