AD8400/AD8402/AD8403–Typical Performance Characteristics
10
V
DD
= +3V OR +5V
8
RESISTANCE – kΩ
V
WB
VOLTAGE – V
5
80
H
FF
H
60
SS = 184 UNITS
V
DD
= 4.5V
T
A
= +25°C
4
40
H
3
20
H
CODE = 10
H
2
FREQUENCY
6
7
48
6
36
4
24
2
R
WB
R
WA
1
05
H
0
0
T
A
= +25°C
V
DD
= +5V
12
0
0
32
64
96 128 160 192 224
CODE – Decimal
256
1
2
3
4
5
I
WA
CURRENT – mA
0
40.0 42.5 45.0 47.5 50.0 52.5 55.0 57.5 60.0 62.5 65.0
WIPER RESISTANCE –
Ω
Figure 2. Wiper to End Terminal
Resistance vs. Code
Figure 3. Resistance Linearity vs.
Conduction Current
Figure 4. 100 k
Ω
Wiper-Contact-
Resistance Histogram
1
V
DD
= +5V
0.5
60
SS = 1205 UNITS
V
DD
= 4.5V
10
R
AB
(END-TO-END)
T
A
= +85°C
FREQUENCY
NOMINAL RESISTANCE –
Ω
48
T
A
= +25°C
8
R-INL ERROR – LSB
36
6
0
T
A
= –40°C
T
A
= +25°C
–0.5
24
4
R
WB
(WIPER-TO-END)
CODE = 80
H
12
2
–1
0
64
96 128 160 192 224
32
DIGITAL INPUT CODE – Decimal
256
0
40.0 42.5 45.0 47.5 50.0 52.5 55.0 57.5 60.0 62.5 65.0
WIPER RESISTANCE –
Ω
0
25
50
75
–75 –50 –25 0
TEMPERATURE –
°C
100
125
Figure 5. Resistance Step Position
Nonlinearity Error vs. Code
Figure 6. 10 k
Ω
Wiper-Contact-
Resistance Histogram
Figure 7. Nominal Resistance vs.
Temperature
INL NONLINEARITY ERROR – LSB
V
DD
= +5V
0.5
FREQUENCY
POTENTIOMETER MODE TEMPCO – ppm/C°
1
60
SS = 184 UNITS
V
DD
= 4.5V
T
A
= +25°C
70
60
50
40
30
20
10
0
–10
V
DD
= +5V
T
A
= –40°C/+85°C
V
A
= 2.00V
V
B
= 0V
48
T
A
= +25°C
T
A
= –40°C
0
36
24
–0.5
T
A
= +85°C
12
–1
0
32
64
96 128 160 192 224
DIGITAL INPUT CODE – Decimal
256
0
35 37
39
41 43
45
47
49 51
53
55
0
32
64
WIPER RESISTANCE –
Ω
96 128 160 192 224 256
CODE – DECIMAL
Figure 8. Potentiometer Divider
Nonlinearity Error vs. Code
Figure 9. 50 k
Ω
Wiper-Contact-
Resistance Histogram
Figure 10. V
WB
/ T Potentiometer
Mode Tempco
–8–
REV. B
AD [ ANALOG DEVICES ]
