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AD5123 Datasheet(PDF) 18 Page - Analog Devices

Part No. AD5123
Description  Quad Channel, 128-/256-Position, I2C, Nonvolatile Digital Potentiometer
Download  28 Pages
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Maker  AD [Analog Devices]
Homepage  http://www.analog.com
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AD5123 Datasheet(HTML) 18 Page - Analog Devices

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AD5123/AD5143
Data Sheet
Rev. B | Page 18 of 28
TEST CIRCUITS
Figure 31 to Figure 35 define the test conditions used in the Specifications section.
A
W
B
NC
IW
DUT
VMS
NC = NO CONNECT
Figure 31. Resistor Integral Nonlinearity Error (Rheostat Operation; R-INL, R-DNL)
A
W
B
DUT
VMS
V+
V+ = VDD
1LSB = V+/2N
Figure 32. Potentiometer Divider Nonlinearity Error (INL, DNL)
A
W
B
DUT
IW =VDD/RNOMINAL
VMS1
VW
RW =VMS1/IW
NC = NO CONNECT
Figure 33. Wiper Resistance
A
W
B
VMS
V+ = VDD ±10%
PSRR (dB) = 20 LOG
VMS
∆VDD
( )
~
VA
VDD
∆VMS%
∆VDD%
PSS (%/%) =
V+
Figure 34. Power Supply Sensitivity and
Power Supply Rejection Ratio (PSS, PSRR)
+
DUT
CODE = 0x00
0.1V
VSS TO VDD
RSW =
0.1V
ISW
ISW
W
B
A = NC
Figure 35. Incremental On Resistance


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