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AD5253

Analog Devices
Part Number AD5253
Manufacturer Analog Devices
Description Quad 64-/256-Position I2C Nonvolatile Memory Digital Potentiometers
Published Apr 9, 2020
Detailed Description Data Sheet AD5253/AD5254 Quad 64-/256-Position I2C Nonvolatile Memory Digital Potentiometers FEATURES FUNCTIONAL BLOCK...
Datasheet PDF File AD5253 PDF File

AD5253
AD5253

Overview
Data Sheet AD5253/AD5254 Quad 64-/256-Position I2C Nonvolatile Memory Digital Potentiometers FEATURES FUNCTIONAL BLOCK DIAGRAM ► AD5253: quad 64-position resolution ► AD5254: quad 256-position resolution ► 1 kΩ, 10 kΩ, 50 kΩ, 100 kΩ ► Nonvolatile memory 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 access of RDAC 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 +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 Figure 1.
GENERAL DESCRIPTION The AD5253/AD52541 are quad-channel, I2C, nonvolatile memory, digitally controlled potentiometers with 64/256 positions, respectively.
These devices perform the same electronic adjustment functions as mechanical potentiometers, trimmers, and variable resistors.
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, lookup table, or sys...


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