ad5259 Analog Devices, Inc., ad5259 Datasheet - Page 13

• Manufacturer Part Number: ad5259
• Description: Nonvolatile, I2c-compatible 256-position, Digital Potentiometer
• Manufacturer: Analog Devices, Inc.

TEST CIRCUITS
Figure 32 through Figure 37 illustrate the test circuits that define the test conditions used in the product Specifications tables.
Figure 32. Test Circuit for Potentiometer Divider Nonlinearity Error (INL, DNL)
Figure 33. Test Circuit for Resistor Position Nonlinearity Error
V
MS2
Figure 34. 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
= [V
/R
I
W
DD
NOMINAL
MS1
N
– V
MS2
]/I
W
Rev. A | Page 13 of 24
Figure 35. Test Circuit for Power Supply Sensitivity (PSS, PSSR)
Figure 37. Test Circuit for Common-Mode Leakage Current
OFFSET
GND
V+
Figure 36. 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
W
R
CODE = 0x00
SW
V+ = V
PSRR (dB) = 20 LOG
PSS (%/%) =
V
=
MS
DD
0.1V
I
SW
AD8610
DD
+5V
–5V
±
0.1V
10%
ΔV
ΔV
MS
DD
%
%
(
ΔV
ΔV
V
OUT
DD
MS
AD5259
)