Datasheet

AD8400/AD8402/AD8403
Rev. E | Page 14 of 32
TYPICAL PERFORMANCE CHARACTERISTICS
CODE (Decimal)
10
8
0
0 32 256
64 96 128 160 192 224
6
4
2
RESISTANCE (kΩ)
R
WB
R
WA
V
DD
=3V OR5V
R
AB
= 10kΩ
01092-009
Figure 9. Wiper to End Terminal Resistance vs. Code
I
WB
CURRENT (mA)
V
WB
VOLTAGE (V)
5
4
0
3
2
1
80
H
40
H
20
H
FF
H
CODE = 10
H
05
H
01234567
T
A
=25°C
V
DD
=5V
01092-010
Figure 10. Resistance Linearity vs. Conduction Current
DIGITAL INPUT CODE (Decimal)
R-INL ERROR (LSB)
1.0
0.5
–1.0
0 32 256
64 96 128 160 192 224
0
–0.5
V
DD
=5V
T
A
=–40°C
T
A
=+25°C
T
A
=+85°C
01092-011
Figure 11. Resistance Step Position Nonlinearity Error vs. Code
WIPER RESISTANCE (Ω)
FREQUEN
C
Y
60
48
0
40.0 42.5 65.045.0 47.5 50.0 52.5 55.0 57.5 60.0 62.5
36
24
12

SS = 1205 UNITS
V
DD
=4.5V
T
A
=25°C
01092-012
Figure 12. 10 kΩ Wiper-Contact-Resistance Histogram
DIGITAL INPUT CODE (Decimal)
INL NONLINEARITY ERROR (LSB)
1.0
0.5
–1.0
0 32 25664 96 128 160 192 224
0
–0.5
T
A
= –40°C
T
A
=+25°C
T
A
=+85°C
V
DD
=5V
01092-013
Figure 13. Potentiometer Divider Nonlinearity Error vs. Code
WIPER RESISTANCE (Ω)
FREQUEN
C
Y
60
48
0
35 37 5539 41 43 45 47 49 51 53
36
24
12
SS = 184 UNITS
V
DD
=4.5V
T
A
=25°C
01092-014
Figure 14. 50 kΩ Wiper-Contact-Resistance Histogram