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CAT522LI Datasheet(PDF) 10 Page - Catalyst Semiconductor

Part # CAT522LI
Description  Configured Digitally Programmable Potentiometer (DPP??: Programmable Voltage Applications
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Manufacturer  CATALYST [Catalyst Semiconductor]
Direct Link  http://www.catalyst-semiconductor.com
Logo CATALYST - Catalyst Semiconductor

CAT522LI Datasheet(HTML) 10 Page - Catalyst Semiconductor

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CAT522
Doc. No. MD-2004 Rev. G
10
© Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
Coarse-Fine Offset Control by Averaging DPP
Outputs for Single Power Supply Systems
Coarse-Fine Offset Control by Averaging DPP
Outputs for Dual Power Supply Systems
Current Sink with 4 Decades of Resolution
GND
VOFFSET
FINE ADJUST
DPP
CAT522
COARSE ADJUST
DPP
VDD
+5V
VREFH
VREF
+V
VREFL
RC
127RC
+
–
RC =
VREF
256 x 1µA
Fine adjust gives ±1 LSB change in VOFFSET
when VOFFSET = VREF/2
GND
VOFFSET
FINE ADJUST
DPP
CAT522
COARSE ADJUST
DPP
VDD
+5V
VREFH
+VREF
+V
-V
VREFL
RC
R0
127RC
+
–
-VREF
RC =
(+VREF) - (VOFFSET+)
1µA
R0 =
(-VREF) + (VOFFSET+)
1µA
CONTROL
&DATA
GND
VREFL
VDD
+5V
ISINK = 2 - 255mA
1mA steps
5µA steps
TIP30
-15V
VREFH
4.7µF
LM385-2.5
DPP1
CAT522
DPP2
+15V
39Ω 1W
10kΩ
2.2kΩ
10kΩ
10kΩ
39Ω 1W
2N7000
2N7000
+
–
3.9kΩ
5MΩ
5MΩ
10kΩ
+
–
+5V


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