GENERAL DESCRIPTION

The AD5263 is the industry’s first quad-channel, 256-position, digital potentiometer1 with a selectable digital interface. 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.

Each channel of the AD5263 offers a completely programmable value of resistance between the A terminal and the wiper or between the B terminal and the wiper. The fixed A-to-B terminal resistance of 20 kΩ, 50 kΩ, or 200 kΩ has a nominal temperature coefficient of ±30 ppm/°C and a ±1 channel-to-channel matching tolerance. Another key feature of this part is the ability to operate from +4.5 V to +15 V, or at ±5 V.

FEATURES

256-position, 4-channel

End-to-end resistance 20 kΩ, 50 kΩ, 200 kΩ

Pin-selectable SPI®- or I2C®-compatible interface

Power-on preset to midscale

Two package address decode pins AD0 and AD1

Rheostat mode temperature coefficient 30 ppm/°C

Voltage divider temperature coefficient 5 ppm/°C

Wide operating temperature range –40°C to +125°C

10 V to 15 V single supply; ±5 V dual supply

APPLICATIONS

Mechanical potentiometer replacement

Optical network adjustment

Instrumentation: gain, offset adjustment

Stereo channel audio level control

Automotive electronics adjustment

Programmable power supply

Programmable filters, delays, time constants

Line impedance matching

Low resolution DAC/trimmer replacement

Base station power amp biasing

Sensor calibration