32-Tap, Nonvolatile, Linear-Taper Digital

Potentiometers in SOT23

6

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Pin Description

RESISTANCE DNL vs. TAP POSITION

(MAX5475)

TAP POSITION

25

20

15

10

5

-0.03

-0.02

-0.01

0

0.01

0.02

0.03

0.04

-0.04

030

VOLTAGE-DIVIDER MODE

RESISTANCE INL vs. TAP POSITION

(MAX5475)

TAP POSITION

25

20

15

10

5

-0.03

-0.02

-0.01

0

0.01

0.02

0.03

0.04

-0.04

030

VOLTAGE-DIVIDER MODE

Typical Operating Characteristics (continued)

°C, unless otherwise noted.)

PIN

MAX5471/

MAX5472

MAX5474/

MAX5475

NAME

FUNCTION

11

CS

Chip-Select Input. Drive low to change wiper position (W) through INC and U/D. A low-to-

high transition with INC high stores the wiper position in nonvolatile memory.

2

3

GND

Ground

34

U/D

Up/Down Control Input. With U/D low, a high-to-low INC transition decrements the wiper

position. With U/D high, a high-to-low INC transition increments the wiper position.

45

INC

Wiper Increment Control Input. With CS low, the wiper position moves in the direction

determined by the state of U/D on a high-to-low transition.

56

H

High Terminal of Resistor. The voltage at H can be greater than or less than the voltage at L.

Current can flow into or out of H.

62

Power Supply

—

7

W

Wiper Terminal of Resistor

—

8L

Low Terminal of Resistor. The voltage at L can be greater than or less than the voltage at H.

Current can flow into or out of L.