Datasheet

Data Sheet AD5231
Rev. D | Page 13 of 28
TEST CIRCUITS
Figure 26 to Figure 35 define the test conditions used in the specifications.
A
W
B
NC
I
W
DUT
V
MS
NC = NO CONNECT
02739-026
Figure 26. Resistor Position Nonlinearity Error
(Rheostat Operation; R-INL, R-DNL)
A
W
B
DUT
V
MS
V+
V+ = V
DD
1LSB = V+/2
N
02739-027
Figure 27. Potentiometer Divider Nonlinearity Error (INL, DNL)
A
W
B
DUT
I
W
V
MS1
V
MS2
V
W
R
W
= [V
MS1
– V
MS2
]/I
W
02739-028
Figure 28. Wiper Resistance
A
W
B
V
MS
V
A
V
DD
V+
V+ = V
DD
±10%
PSRR (dB) = 20 log
ΔV
MS
ΔV
DD
PSS (%/%) =
ΔV
MS
%
ΔV
DD
%
02739-029
Figure 29. Power Supply Sensitivity (PSS, PSRR)
OFFSET BIAS
OFFSET
GND
A
B
DUT
W
5V
V
IN
V
OUT
OP279
02739-030
Figure 30. Inverting Gain
OFFSET BIAS
OFFSET
GND
A BDUT
W
5V
V
IN
V
OUT
OP279
02739-031
Figure 31. Noninverting Gain
OFFSET
GND
A
B
DUT
W
+15V
V
OUT
V
IN
OP42
–15V
+2.5V
02739-032
Figure 32. Gain vs. Frequency
+
–
DUT
NC
CODE = 0x000
0.1V
V
BIAS
R
SW
=
0.1V
I
SW
I
SW
W
B
A
NC = NO CONNECT
02739-033
Figure 33. Incremental On Resistance
I
CM
V
CM
W
B
V
DD
DUT
NC
NC
GNDV
SS
A
NC = NO CONNECT
02739-034
Figure 34. Common-Mode Leakage Current
200µA I
OL
200µA I
OH
V
OH
(MIN)
OR
V
OL
(MAX)
TO OUTPUT
PIN
C
L
50pF
02739-057
Figure 35. Load Circuit for Measuring V
OH
and V
OL
(The diode bridge test
circuit is equivalent to the application circuit with R
PULL-UP
of 2.2 kΩ)