–Typical Performance Characteristics
AD7376
0.5
100
0.25
0.4
0.20
0.15
0.10
0.05
T
= –55؇C
A
0.3
T
A
= +25؇C
75
T
= –55؇C
A
T
= +25؇C
0.2
A
0.1
T
= +85؇C
A
50
0
0
–0.05
–0.10
–0.15
–0.20
–0.25
V
V
V
V
= +15V
DD
–0.1
–0.2
–0.3
–0.4
–0.5
= –15V
SS
T
= +85؇C
A
= 2.5V
= 0V
A
B
25
0
V
= +15V
= –15V
= 50k⍀
DD
SS
R
= 50k⍀
V
AB
R
R
R
WB
WA
AB
0
32
64
96
128
0
16
32
48
64 80
96 112 128
0
16
32
48
64 80
96 112 128
CODE – Decimal
CODE – Decimal
CODE – Decimal
Figure 3. Resistance Step Position
Nonlinearity Error vs. Code
Figure 4. Relative Resistance Step
Change from Ideal vs. Code
Figure 2. Wiper To End Term inal
Percent Resistance vs. Code
1.5
50
14
I
= 100A, T = +25؇C
A
w
01
H
DATA = 40
H
10
V
V
= +15V
H
DD
1.2
0.9
0.6
12
49
48
47
46
45
= –15V
20
H
SS
R
= 50k⍀ NOMINAL
AB
10
40
H
8
T
= +25؇C
A
6
4
V
V
= +15V
DD
= –15V
SS
R
= 50k⍀
AB
CODE = 70
0.3
0
H
2
0
7F
H
0
0.25 0.5 0.75
1
1.25 1.5 1.75
2
5
10
15
20
25
30
–55 –35 –15
5
25 45 65 85 105 125
I
– mA
SUPPLY VOLTAGE (V - V ) – Volts
WA
DD
SS
TEMPERATURE – ؇C
Figure 6. Resistance Linearity vs.
Conduction Current
Figure 7. Resistance Nonlinearity
Error vs. Supply Voltage
Figure 5. Nom inal Resistance vs.
Tem perature
1000
900
20
15
1.0
V
V
= 2.5V
= 0V
R
= 50k⍀
A
AB
800
700
600
500
400
300
200
100
0
B
10
5
0.8
0.6
0.4
CODE = 40
H
R
= 50k⍀
AB
V
V
= +5V
= 0V
DD
SS
0
–5
V
V
V
V
= +15V
= –15V
DD
SS
–10
–15
V
V
= +5V
= +2.5V
DD
A
B
= –5V
= 0V
SS
–20
–25
–30
–55؇C < T < +85؇C
0.2
0
A
V
V
= +15V
= –15V
R
= 50k⍀
DD
SS
AB
–55 –35 –15
5
25 45 65 85 105 125
0
16
32 48 64
80
96 112 128
5
10
15
20
DD
25
30
CODE – Decimal
TEMPERATURE – ؇C
SUPPLY VOLTAGE (V - V ) – Volts
SS
Figure 10. Wiper Contact
Resistance vs. Tem perature
Figure 9. ∆VWB/∆T Potentiom eter
Mode Tem pco
Figure 8. Potentiom eter Divider
Nonlinearity Error vs. Supply
Voltage
–4–
REV. 0