NIDEC COPAL ELECTRONICS CORP

August, 2010

Rev. 14

1

Publication Order Number:

DP7112/D

DP7112

32-Tap Digital Potentiometer (DP)

with Buffered Wiper

Description

The

DP7112

is

a

single

digital

potentiometer

(DP)

designed

as

an

electronic

replacement

for

mechanical

potentiometers. Ideal for automated adjustments on high volume

production lines, they are also well suited for applications where

equipment requiring periodic adjustment is either difficult to access or

located in a hazardous or remote environment.

The DP7112 contains a

series resistor array connected

that are controlled by three input pins, determines which tap is

amp that operates rail to rail. The wiper setting, stored in non volatile

memory, is not lost when the device is powered down and is

automatically recalled when power is returned. The wiper can be

adjusted to test new system values without effecting the stored setting.

Wiper control of the DP7112 is accomplished with three input

control pins, CS, U/D, and INC. The INC input increments the wiper

in the direction which is determined by the logic state of the U/D input.

The CS input is used to select the device and also store the wiper

position prior to power down.

The digital potentiometer can be used as a buffered voltage

divider. For applications where the potentiometer is used as a

2 terminal variable resistor, please refer to the DP7114. The

buffered wiper of the DP7112 is not compatible with that

application.

Features

32 position Linear Taper Potentiometer

Non volatile EEPROM Wiper Storage; Buffered Wiper

Low Power CMOS Technology

Single Supply Operation: 2.5 V

6.0 V

Increment Up/Down Serial Interface

Resistance Values: 10 k , 50 k

and 100 k

Available in SOIC, TSSOP and MSOP Packages

These Devices are Pb Free, Halogen Free/BFR Free and are RoHS

Compliant

Applications

Automated Product Calibration

Remote Control Adjustments

Offset, Gain and Zero Control

Tamper proof Calibrations

Contrast, Brightness and Volume Controls

Motor Controls and Feedback Systems

Programmable Analog Functions

PIN CONFIGURATIONS

U/D

INC

CS

1

See detailed ordering and shipping information in the package

dimensions section on page 11 of this data sheet.

ORDERING INFORMATION

SOIC 8

MSOP 8

GND

SOIC (V),

MSOP (Z)

TSSOP 8

Increment Control

INC

Up/Down Control

U/D

Potentiometer High Terminal

Ground

GND

Buffered Wiper Terminal

Potentiometer Low Terminal

Function

Pin Name

PIN FUNCTION

Chip Select

CS

Supply Voltage

TSSOP (Y)

(Top Views)

GND

U/D

INC

CS

1