Datasheet

AD5124/AD5144/AD5144A Data Sheet
Rev. A | Page 22 of 36
TEST CIRCUITS
Figure 38 to Figure 42 define the test conditions used in the Specifications section.
A
W
B
NC
I
W
DUT
V
MS
NC = NO CONNECT
10877-038
Figure 38. Resistor Integral Nonlinearity Error (Rheostat Operation; R-INL, R-DNL)
A
W
B
DUT
V
MS
V+
V+ = V
DD
1LSB = V+/2
N
10877-039
Figure 39. Potentiometer Divider Nonlinearity Error (INL, DNL)
A
W
NC
B
DUT
I
W
= V
DD
/R
NOMINAL
V
MS1
V
W
R
W
= V
MS1
/I
W
10877-040
NC = NO CONNECT
Figure 40. Wiper Resistance
A
W
B
V
MS
V+ = V
DD
±10%
PSRR (dB) = 20 LOG
V
MS
∆V
DD
(
)
~
V
A
V
DD
∆V
MS
%
∆V
DD
%
PSS (%/%) =
V+
∆
10877-041
Figure 41. Power Supply Sensitivity and
Power Supply Rejection Ratio (PSS and PSRR)
+
–
DUT
CODE = 0x00
0.1V
V
SS
TO V
DD
R
SW
=
0.1
V
I
SW
I
SW
W
B
A = NC
10877-045
Figure 42. Incremental On Resistance