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 k?, 10 k?, 50 k?, 100 k?

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 k? 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

AD5253BRU50屬于集成電路（IC） > 數(shù)字電位計(jì)。亞德諾半導(dǎo)體技術(shù)有限公司制造生產(chǎn)的AD5253BRU50數(shù)字電位計(jì)數(shù)字電位器是一系列集成電路器件，可提供類似于傳統(tǒng)機(jī)械電位器或變阻器的可調(diào)節(jié)電阻，但通過(guò)電子信號(hào)而非機(jī)械輸入來(lái)進(jìn)行控制。雖然這些器件的電阻可耗散的電能相對(duì)有限，但其電子控制能力有助于小型化、自動(dòng)化和遠(yuǎn)程控制信號(hào)級(jí)模擬電路，而這些電路本來(lái)可能會(huì)使用機(jī)械電位器。