Dual, 256-Tap, Volatile, Low-Voltage

Linear Taper Digital Potentiometers

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Pin Description

Figure 1. Voltage-Divider/Variable-Resistor Configurations

PIN

NAME

FUNCTION

MAX5386

MAX5388

1

3

HB

Resistor B High Terminal. The voltage at HB can be higher or lower than the voltage

at LB. Current can flow in to or out of HB.

2

4

WB

Resistor B Wiper Terminal

3

2

LB

Resistor B Low Terminal. The voltage at LB can be higher or lower than the voltage

at HB. Current can flow in to or out of LB.

4

—

I.C.

Internally Connected. Connect to GND.

5

1

GND

Ground. Both pins must be grounded.

6, 7, 11, 13

—

N.C.

No Connection. Not internally connected.

8

5

CS

Active-Low Chip-Select Input

9

6

DIN

Serial-Interface Data Input

10

7

SCLK

Serial-Interface Clock Input

12

8

14

—

HA

Resistor A High Terminal. The voltage at HA can be higher or lower than the voltage

at LA. Current can flow in to or out of HA.

15

9

WA

Resistor A Wiper Terminal

16

10

LA

Resistor A Low Terminal. The voltage at LA can be higher or lower than the voltage

at HA. Current can flow in to or out of LA.

—

—

EP

Exposed Pad (TQFN Only). Internally connected to GND. Connect to ground.

H

L

W

VOLTAGE-DIVIDER

CONFIGURATION

VARIABLE-RESISTOR

CONFIGURATION

N.C.

L

W