GENERAL DESCRIPTION

The AD5253/AD5254 are quad channel, I2C, nonvolatile memory, digitally controlled potentiometers with 64/256 positions, respectively. These devices perform the same electronic adjust ment functions as mechanical potentiometers, trimmers, and variable resistors.

FEATURES

AD5253: Quad 64-position resolution

AD5254: Quad 256-position resolution

1 kΩ, 10 kΩ, 50 kΩ, 100 kΩ

Nonvolatile memory1 stores wiper settings with 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 accesses of 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 operation of 4 devices

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

Operating temperature: –40°C to +85°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

AD5253BRU10属于集成电路（IC） > 数字电位计。亚德诺半导体技术有限公司制造生产的AD5253BRU10数字电位计数字电位器是一系列集成电路器件，可提供类似于传统机械电位器或变阻器的可调节电阻，但通过电子信号而非机械输入来进行控制。虽然这些器件的电阻可耗散的电能相对有限，但其电子控制能力有助于小型化、自动化和远程控制信号级模拟电路，而这些电路本来可能会使用机械电位器。