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CAT513 Datasheet, PDF (8/10 Pages) Catalyst Semiconductor – 8-Bit Dual Digital POT | |||
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CAT513
APPLICATION CIRCUITS (Cont.)
+5V
VREF
VDD
VREFH
RC
=
ââVRâEâF â
256 * 1 µA
Fine adjust gives ± 1 LSB change in V OFFSET
when VOFFSET = âVRâ2EâF
FINE ADJUST
DAC
127RC
COARSE ADJUST
DAC
+V
RC
V OFFSET +
â
GND
VREFL
Advance Information
+5V
+VREF
VDD
VREFH
FINE ADJUST
DAC
COARSE ADJUST
DAC
GND
VREFL
-V REF
127RC
RC
RC
=
(â+VâRâEFâ) â- (âVOâFFâSâETâ+â)
1 µA
Ro
=
(â-VâREâFâ) +â(âVOâFFâSâETâ+â)
1 µA
+V
Ro
VOFFSET +
â
-V
Coarse-Fine Offset Control by Averaging DAC Outputs
for Single Power Supply Systems
V+
Coarse-Fine Offset Control by Averaging DAC Outputs
for Dual Power Supply Systems
28 - 32V
CONTROL
& DATA
I > 2 mA
VDD
VREFH
OCPAT 551034
GND
VREFL
VREF= 5.000V
LT 1029
CONTROL
& DATA
15K
10 µF
1N5231B
VDD
VREFH 5.1V
COAPTT50143
+
GND
VREFL
â
1.00K
10K
LM 324
4.02 K
MPT3055EL
10 µF
35V
OUTPUT
0 - 25V
@ 1A
Digitally Trimmed Voltage Reference
Digitally Controlled Voltage Reference
Doc. No. ________ 3/01 M-1
8
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