Analog Devices Inc. AD5242BRUZ100

Description
The AD5241/AD5242 are single-/dual-channel, 256-position, digitally controlled variable resistors (VRs). They perform the same electronic adjustment function as a potentiometer, trimmer, or variable resistor. Each VR offers a programmable resistance value between the A Terminal and the wiper, or the B Terminal and the wiper. For AD5242, the fixed A-to-B terminal resistance of 10 kΩ, 100 kΩ, or 1 MΩ has a 1% channel-to-channel matching tolerance. The nominal temperature coefficient of both parts is 30 ppm/°C.
Wiper position programming defaults to midscale at system power ON. Once powered, the VR wiper position is programmed by an IC compatible 2-wire serial data interface. Both parts have available two extra programmable logic outputs that enable users to drive digital loads, logic gates, LED drivers, and analog switches in their system.
The AD5241/AD5242 are available in surface-mount (SOIC-14-16) packages and, for ultracompact solutions, TSSOP-14-16 packages. All parts are guaranteed to operate over the extended temperature range of -40°C to 105°C.

Features
256 Positions
10 kΩ, 100 kΩ, 1 MΩ
Low Tempco 30 ppm/°C
Single-Supply 2.7 V to 5.5V or Internal Power ON Midscale Preset
Dual-Supply ±2.7 V for AC or Bipolar Operation
I²C Compatible Interface with Readback Capability
Extra Programmable Logic Outputs
Self-Contained Shutdown Feature
Extended Temperature Range -40°C to 105°C

Applications
Multimedia, Video, and Audio
Communications
SDAs
Mechanical Potentiometer Replacement
Instrumentation: Gain, Offset Adjustment
Programmable Voltage-to-Current Conversion
Line Impedance Matching