AD7376 datasheet(4/12 Pages) AD

4 / 12 page

AD7376

–4–

REV. 0

100

128

RWB

RWA

CODE – Decimal

Figure 2. Wiper To End Terminal

Percent Resistance vs. Code

TEMPERATURE – C

–55 –35

105

–15

VDD = +15V

VSS = –15V

RAB = 50k NOMINAL

125

Figure 5. Nominal Resistance vs.

Temperature

SUPPLY VOLTAGE (VDD - VSS) – Volts

1.0

510

0.8

0.2

0.6

0.4

VA = 2.5V

VB = 0V

CODE = 40H

RAB = 50k

Figure 8. Potentiometer Divider

Nonlinearity Error vs. Supply

Voltage

–Typical Performance Characteristics

CODE – Decimal

0.5

–0.5

128

112

0.4

0.1

–0.2

–0.4

0.3

0.2

–0.1

–0.3

TA = –55 C

TA = +25 C

TA = +85 C

VDD = +15V

VSS = –15V

VA = 2.5V

VB = 0V

RAB = 50k

Figure 3. Resistance Step Position

Nonlinearity Error vs. Code

IWA – mA

0.25

0.5 0.75

1.25

1.5 1.75

TA = +25 C

VDD = +15V

VSS = –15V

RAB = 50k

20H

01H

10H

40H

7FH

CODE = 70H

Figure 6. Resistance Linearity vs.

Conduction Current

CODE – Decimal

128

112

–5

VDD = +15V

VSS = –15V

VA = +2.5V

VB = 0V

–55 C < TA < +85 C

RAB = 50k

–10

–15

–20

–25

–30

Figure 9.

∆V

WB/

∆T Potentiometer

Mode Tempco

CODE – Decimal

0.25

–0.25

128

112

0.20

0.05

–0.10

–0.20

0.15

0.10

–0.05

–0.15

TA = –55 C

TA = +25 C

VDD = +15V

VSS = –15V

RAB = 50k

TA = +85 C

Figure 4. Relative Resistance Step

Change from Ideal vs. Code

SUPPLY VOLTAGE (VDD - VSS) – Volts

1.5

510

1.2

0.3

0.9

0.6

Iw = 100 A, TA = +25 C

DATA = 40H

Figure 7. Resistance Nonlinearity

Error vs. Supply Voltage

TEMPERATURE – C

1000

–55 –35

125

–15

105

900

600

500

300

100

800

700

400

200

VDD = +5V

VSS = 0V

VDD = +5V

VSS = –5V

RAB = 50k

VDD = +15V

VSS = –15V

Figure 10. Wiper Contact

Resistance vs. Temperature

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