LTC1597 LINER [Linear Technology], LTC1597 Datasheet - Page 15

• Manufacturer Part Number: LTC1597
• Description: 14-Bit and 16-Bit Parallel Low Glitch Multiplying DACs with 4-Quadrant Resistors
• Manufacturer: LINER [Linear Technology]

APPLICATIONS
INPUTS
10 TO 21,
24 TO 27
V
DATA
INPUTS
CLR
WR
REF
LD
10 TO 21,
V
DATA
CLR
16
WR
24, 25
REF
LD
14
WR
WR
R1
3
9
R1
R1
3
9
LD
R1
LD
8
CLR
8
2
R
CLR
28
COM
2
R
R2
28
COM
+
–
1/2 LT1112
LTC1597-1
U
R2
+
–
LTC1591-1
1/2 LT1112
Figure 2a. Bipolar Operation (4-Quadrant Multiplication) V
Figure 2b. Bipolar Operation (4-Quadrant Multiplication) V
INFORMATION
U
REF
REF
1
1
V
CC
NC
V
23
CC
26
23
W
R
4
NC
R
OFS
R
OFS
4
R
27
OFS
16-BIT DAC
OFS
14-BIT DAC
0.1 F
5V
0.1 F
R
FB
5V
R
FB
R
U
5
FB
R
DGND
5
FB
DGND
I
OUT1
AGND
I
OUT1
AGND
22
6
22
6
7
7
33pF
–
+
1/2 LT1112
33pF
–
+
1/2 LT1112
OUT
OUT
V
–V
TO V
OUT
V
–V
TO V
REF
= – V
= – V
OUT
REF
REF
=
REF
=
REF
REF
1111
1000
1000
0111
0000
MSB
LTC1591/LTC1597
MSB
1111
1000
1000
0111
0000
Bipolar Offset Binary Code Table
Bipolar Offset Binary Code Table
to V
to V
IN DAC REGISTER
BINARY NUMBER
IN DAC REGISTER
BINARY NUMBER
DIGITAL INPUT
DIGITAL INPUT
0000 0000 0001
0000 0000 0000
1111 1111 1111
0000 0000 0000
0000 0000 01
0000 0000 00
1111 1111 11
0000 0000 00
1111 1111 1111
1111 1111 11
REF
REF
LSB
LSB
V
V
0V
–V
–V
ANALOG OUTPUT
ANALOG OUTPUT
REF
REF
V
V
0V
–V
–V
REF
REF
REF
REF
REF
REF
(32,767/32,768)
(1/32,768)
(1/32,768)
(8,191/8,192)
(1/8,192)
V
V
(1/8,192)
OUT
OUT
15
1591/97 F02a
1591/97 F02b