wms7131 ETC-unknow, wms7131 Datasheet - Page 14

• Manufacturer Part Number: wms7131
• Description: Nonvolatile Digital Potentiometers
• Manufacturer: ETC-unknow

Resistor position nonlinearity error test
circuit (Rheostat Operation: R-INL, R-DNL)
Potentiometer divider nonlinearity error
test circuit (INL, DNL)
10.1 T
V+
*Assume infinite input impedance
*Assume infinite input impedance
Wiper resistance test circuit
No Connection
*Assume infinite input impedance
EST
WMS71xx
V
V
B
A
B
V
C
WMS71xx
V
V
W
IRCUITS
B
A
V
V
B
WMS71xx
V
A
B
V
B
V
W
MS
W
*
I
R
W
1LSB= V+/256
V+ = V
W
= V
V
I
W
= V
MS
DD
I
W
*
MS
DD
/R
/I
FIGURE 4 – TEST CIRCUITS
Total
W
V
MS
*
- 14 -
Power supply sensitivity test circuit (PSS, PSRR)
OFFSET
V
~
W
+
GND
2.5V DC
V
IN
V
IN
Gain vs. frequency test circuit
*Assume infinite input impedance
~
Capacitance test circuit
V
V
V
2.5V DC
Offset
B
A
A
WMS71xx
B
V
WMS71xx
W
V
V
WMS71xx
PSRR(dB) = 20LOG ( Δ V
PSS(%/% ) = V
V
A
V
V
B
+
B
W
W
= V
DD
WMS7130/1
±
+5V
V
10%
B
B
Δ
V
Δ
+5V
V
MS
M
DD
S
*
V
Δ
OUT
V
V
MS
DD
OUT
)