ADI AD5254BRUZ50

线性425650kI²C2.7V ~ 5.5V，±2.25V ~ 2.75V-40°C ~ 105°C

Overview

The parts’ versatile programmability allows multiple modes of operation, including read/write access in the RDAC and EEMEM registers, increment/decrement of resistance, resistance changes in ±6 dB scales, wiper setting readback, and extra EEMEM for storing user-defined information, such as memory data for other components, look-up table, or system identification information.

2The terms digital potentiometer and RDAC are used interchangeably.

Features

• Nonvolatile memory1 stores wiper settings w/write protection

• Power-on refreshed to EEMEM settings in 300 µs typ

• EEMEM rewrite time = 540 µs typ

• Resistance tolerance stored in nonvolatile memory

• 12 extra bytes in EEMEM for user-defined information

• I2C-compatible serial interface

• Direct read/write access to RDAC2 and EEMEM registers

• Predefined linear increment/decrement commands

• Predefined ±6 dB step change commands

• Synchronous or asynchronous quad-channel update

• Wiper setting readback

• 4 MHz bandwidth—1 kΩ version

• Single supply 2.7 V to 5.5 V

• Dual supply ±2.25 V to ±2.75 V

• 2 slave address-decoding bits allow the operation of 4 devices

• 100-year typical data retention, TA = 55°C

• Operating temperature: –40°C to +105°C

Applications

• Mechanical potentiometer replacement

• Low-resolution DAC replacement

• RGB LED backlight control

• White LED brightness adjustment

• RF base station power amp bias control

• Programmable gain and offset control

• Programmable attenuators

• Programmable voltage-to-current conversion

• Programmable power supply

• Programmable filters

• Sensor calibrations