Compact +30V/±15V 256-Position Digital

Potentiometer

Preliminary Technical Data

AD5290

Rev. PrC

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FEATURES

256-position

+2.7V to +30V Single Supply Operation

±2.7V to ±15V Dual Supply Operation

End-to-end resistance 10 kΩ, 50 kΩ, 100 kΩ

Low temperature coefficient 35 ppm/°C

Power-on preset to midscale

SPI compatible interface

Automotive temperature range –40°C to +105°C

Compact MSOP-10 (3 mm × 4.9 mm) package

APPLICATIONS

Programmable Gain and Offset

Programmable Power Supply

Industrial Actuator Control

LED Array Driver

Audio Volume Control

General Purpose DAC Replacement

Mechanical Potentiometer Replacement

GENERAL OVERVIEW

The AD5290 is a low cost, compact 2.9 mm × 3 mm

+30V/±15V, 256-position digital potentiometer. This device

performs the same electronic adjustment function as

mechanical potentiometers or variable resistors, with enhanced

resolution, solid-state reliability, and superior low temperature

coefficient performance.

The wiper settings are controllable through an SPI compatible

digital interface. The resistance between the wiper and either

end point of the fixed resistor varies linearly with respect to the

digital code transferred into the RDAC latch.

The AD5290 is available in 10k, 50k, and 100kΩ in compact

MSOP-10 package. AD5290 can be operated from a single

supply +2.7 V to +30 V or dual supply ±2.7 V to ±15 V. All

parts are guaranteed to operate over the automotive

temperature range of -40°C to +105°C.

FUNCTIONAL BLOCK DIAGRAM

AD5290

A

W

B

SDO

SDI

CS

DG ND

CLK

Q

D

CK

RS

8-Bit

SERIAL

REG

8-Bit

LATCH

88

POR

AD5290

A

W

B

SDO

SDI

CS

DG ND

CLK

Q

D

CK

RS

8-Bit

SERIAL

REG

8-Bit

LATCH

88

POR

Figure 1.

Note:

The terms digital potentiometer and RDAC are used interchangeably.