AD5220 Analog Devices, AD5220 Datasheet - Page 7

• Manufacturer Part Number: AD5220
• Description: 8-Bit Dual Nonvolatile Memory Digital Potentiometer
• Manufacturer: Analog Devices

REV. 0
Figure 28. Resistor Position Nonlinearity Error (Rheostat
Operation; R-INL, R-DNL)
Figure 27. Potentiometer Divider Nonlinearity Error Test
Circuit (INL, DNL)
Figure 30. Power Supply Sensitivity Test Circuit (PSS,
PSRR)
V+
Figure 29. Wiper Resistance Test Circuit
~
V
MS2
V
DD
V
A
A
B
V+
W
NO CONNECT
A
DUT
B
W
A
B
DUT
A
DUT
B
V
W
W
W
V
I
W
V
MS1
MS
=
V
DD
V+ = V
V
PSRR (dB) = 20 LOG
PSS (%/%) = –––––––
V+ = V
1LSB = V+/128
/R
MS
NOMINAL
R
V
W
MS
I
W
DD
DD
= [V
± 10%
MS1
– V
V
V
MS
DD
MS2
%
%
(
]/I
–––––
W
V
V
MS
DD
)
–7–
Figure 32. Noninverting Programmable Gain Test Circuit
Figure 31. Inverting Programmable Gain Test Circuit
Figure 34. Incremental ON Resistance Test Circuit
Parametric Test Circuits–
Figure 33. Gain vs. Frequency Test Circuit
OFFSET
OFFSET
OFFSET
GND
GND
GND
DUT
B
V
IN
V
W
IN
~
2.5V
V
~
IN
A
DUT
I
SW
~
A
2.5V DC
DUT
2.5V
CODE = ØØ
R
DUT
B
SW
A
W
W
B
W
=
B
0.1V
OP279
I
OP42
SW
OP279
+15V
–15V
+5V
H
+5V
0 TO V
0.1V
DD
AD5220
V
V
OUT
OUT
V
OUT