ad5258 Analog Devices, Inc., ad5258 Datasheet - Page 13

• Manufacturer Part Number: ad5258
• Description: Nonvolatile, I2c-compatible 64-position, Digital Potentiometer
• Manufacturer: Analog Devices, Inc.

TEST CIRCUITS
Figure 30 through Figure 35 illustrate the test circuits that define the test conditions used in the product specification tables.
Figure 30. Test Circuit for Potentiometer Divider Nonlinearity Error (INL, DNL)
Figure 31. Test Circuit for Resistor Position Nonlinearity Error
V
MS2
Figure 32. Test Circuit for Wiper Resistance
V+
NO CONNECT
(Rheostat Operation; R-INL, R-DNL)
A
B
DUT
A W
B
W
A
B
DUT
DUT
W
V
W
V
MS1
I
W
= V
V+ = V
1LSB = V+/2
V
R
MS
V
DD
W
MS
/R
= [V
I
W
DD
NOMINAL
MS1
N
– V
MS2
]/I
W
Rev. A | Page 13 of 24
Figure 33. Test Circuit for Power Supply Sensitivity (PSS, PSSR)
Figure 35. Test Circuit for Common-Mode Leakage Current
OFFSET
GND
V+
Figure 34. Test Circuit for Gain vs. Frequency
ΔV
V
IN
DD
+2.5V
V
B
A
A
B
DUT
DUT
W
W
A
B
I
SW
GND TO V
DUT
R
W
CODE = 0x00
SW
V+ = V
PSSR (%/%) =
V
=
MS
DD
0.1V
I
SW
DD
AD8610
± 10%
+5V
–5V
0.1V
ΔV
ΔV
MS
DD
%
%
V
OUT
AD5258