Datasheet

AD5235 Data Sheet
Rev. F | Page 14 of 32
TEST CIRCUITS
Figure 27 to Figure 37 define the test conditions used in the Specifications section.
A
W
B
NC
I
W
DUT
V
MS
NC = NO CONNECT
02816-026
Figure 27. Resistor Position Nonlinearity Error (Rheostat Operation; R-INL, R-DNL)
A
W
B
DUT
V
MS
V+
02816-027
V+ = V
DD
1LSB = V+/2
N
Figure 28. Potentiometer Divider Nonlinearity Error (INL, DNL)
A
W
B
DUT
I
W
= V
DD
/R
NOMINAL
V
MS1
V
MS2
V
W
02816-028
R
W
= [V
MS1
– V
MS2
]/I
W
Figure 29. Wiper Resistance
A
W
B
V
MS
V+ = V
DD
±10%
PSRR (dB) = 20 LOG
V
MS
ΔV
DD
(
)
~
V
A
V
DD
ΔV
MS
%
ΔV
DD
%
PSS (%/%) =
V+
02816-029
Δ
Figure 30. Power Supply Sensitivity (PSS, PSRR)
OFFSET BIAS
OFFSET
GND
ABDUT
W
5V
V
IN
V
OUT
OP279
02816-030
Figure 31. Inverting Gain
OFFSET BIAS
OFFSET
GND
ABDUT
W
5V
V
IN
V
OUT
OP279
02816-031
Figure 32. Noninverting Gain
OFFSET
GND
A
B
DUT
W
+15V
V
IN
V
OUT
OP42
–15V
2.5V
02816-032
Figure 33. Gain vs. Frequency
+
–
DUT
CODE = 0x00
0.1V
V
SS
TO V
DD
R
SW
=
0.1V
I
SW
I
SW
W
B
A = NC
02816-033
Figure 34. Incremental On Resistance