CAT513 Catalyst Semiconductor, CAT513 Datasheet - Page 8

• Manufacturer Part Number: CAT513
• Description: 8-Bit Dual Digital POT
• Manufacturer: Catalyst Semiconductor

CONTROL
& DATA
Doc. No. ________ 3/01 M-1
APPLICATION CIRCUITS (Cont.)
Coarse-Fine Offset Control by Averaging DAC Outputs
COARSE ADJUST
+5V
FINE ADJUST
V DD
GND
DAC
DAC
V REF
Digitally Trimmed Voltage Reference
V
V
for Single Power Supply Systems
REF
REF
V DD
GND
H
L
OPT 504
CAT513
127R C
R C
Fine adjust gives ± 1 LSB change in V
V
V
REF
REF
when V
H
L
R = —————
V OFFSET
C 256 1 µA
OFFSET
I > 2 mA
V REF
*
= ———
+
–
V REF
+V
V+
2
LT 1029
OFFSET
V
REF
= 5.000V
8
Coarse-Fine Offset Control by Averaging DAC Outputs
CONTROL
& DATA
COARSE ADJUST
+5V
FINE ADJUST
V DD
GND
DAC
DAC
Digitally Controlled Voltage Reference
+V REF
CAT513
for Dual Power Supply Systems
V DD
OPT 504
GND
V
V
REF
REF
-V REF
H
L
V
V
15K
REF
REF
H
L
1N5231B
10 µF
5.1V
127R C
R C
R o
1.00K
Advance Information
+
–
V OFFSET
LM 324
4.02 K
R = ———————————
R = ———————————
+
–
C
o
10K
+V
-V
(+V
(-V
28 - 32V
REF
REF
MPT3055EL
) + (V
) - (V
10 µF
35V
1 µA
1 µA
OFFSET
OFFSET
OUTPUT
0 - 25V
@ 1A
+
+
)
)