
AD5280/AD5282
Rev. C | Page 12 of
28
TEST CIRCUITS
Figure 33 to
Figure 43 define the test conditions used in the product specification table.
A
W
DUT
B
V+ = VDD
1LSB = V+/2N
V+
W
DUT
VMS
02
929
-03
1
Figure 33. Potentiometer Divider Nonlinearity Error (INL, DNL)
A
W
DUT
IW
NO CONNECT
B
VMS
02
929
-03
2
Figure 34. Resistor Position Nonlinearity Error
(Rheostat Operation; R-INL, R-DNL)
A
W
B
DUT
VMS2
VMS1
02
929
-03
3
VW
IW = VDD/RNOMINAL
RW = [VMS1 –VMS2]/IW
Figure 35. Wiper Resistance
A
W
VDD
VA
B
V+
VMS
02
92
9-
03
4
V+ = VDD ±10%
PSRR (dB) = 20 LOG
(
)
PSS (%/%) =
ΔVMS
ΔVDD
ΔVMS%
ΔVDD%
Figure 36. Power Supply Sensitivity (PSS, PSSR)
A
5V
VOUT
OFFSET
GND
OFFSET
BIAS
VIN
02
92
9-
0
3
5
B
OP279
Figure 37. Inverting Gain
W
VOUT
OFFSET
GND
OFFSET
BIAS
VIN
02
92
9-
03
6
DUT
OP279
5V
B
A
Figure 38. Noninverting Gain
VOUT
OFFSET
GND
2.5V
VIN
DUT
02
92
9-
03
7
A
W
AD8610
+15V
–15V
B
Figure 39. Gain vs. Frequency
W
B
VSS TO VDD
DUT
ISW
0.1V
RSW =
0.1V
ISW
02
92
9-
03
8
Figure 40. Incremental On Resistance