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AD5222 Datasheet(PDF) 7 Page - Analog Devices

Part No. AD5222
Description  Increment/Decrement Dual Digital Potentiometer
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Maker  AD [Analog Devices]
Homepage  http://www.analog.com
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 7 page
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Parametric Test Circuits–AD5222
–7–
REV. 0
V+
DUT
VMS
A
B
W
V+ = VDD
1LSB = V+/128
Figure 21. Potentiometer Divider Nonlinearity Error Test
Circuit (INL, DNL)
NO CONNECT
IW
DUT
VMS
A
B
W
Figure 22. Resistor Position Nonlinearity Error (Rheostat
Operation; R-INL, R-DNL)
VMS2
VW
IW = VDD/RNOMINAL
DUT
VMS1
A
B
W
RW = [VMS1 – VMS2]/IW
Figure 23. Wiper Resistance Test Circuit
PSRR (dB) = 20 LOG
( ––––– )
PSS (%/%) = –––––––
VMS
VDD
VMS%
VDD%
V+ = VDD ± 10%
VDD
VA
~
V+
VMS
A
B
W
Figure 24. Power Supply Sensitivity Test Circuit (PSS,
PSRR)
A
B
VIN
OP279
+5V
VOUT
DUT
W
+
–5V
Figure 25. Inverting Programmable Gain Test Circuit
+5V
–5V
A
B
VIN
VOUT
DUT
W
OP279
Figure 26. Noninverting Programmable Gain Test Circuit
A
B
DUT
W
VIN
OP42
+15V
VOUT
–15V
Figure 27. Gain vs. Frequency Test Circuit
ISW
0 TO VDD
RSW =
0.1V
ISW
CODE = 00H
0.1V
DUT
B
W
Figure 28. Incremental ON Resistance Test Circuit




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