HomedatasheetAD5254BRUZ100-RL7

AD5254BRUZ100-RL7 Datasheet

Analog Devices AD5254BRUZ100-RL7
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Description

The AD5254BRUZ100-RL7 are quad-channel, I2 C®, nonvolatile mem-ory, digitally controlled potentiometers with 64/256 positions, respectively. These devices perform the same electronic adjust-ment 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, look-up table, or system identification information.The AD5254BRUZ100-RL7 allow the host I2C controllers to write any of the 64-/256-step wiper settings in the RDAC registers and store them in the EEMEM. Once the settings are stored, they are restored automatically to the RDAC registers at system power-on; the settings can also be restored dynamically.The AD5254BRUZ100-RL7 provide additional increment, decrement, +6 dB step change, and –6 dB step change in synchronous or asynchronous channel update mode. The increment and decrement functions allow stepwise linear adjustments, with a ± 6 dB step change equivalent to doubling or halving the RDAC wiper setting. These functions are useful for steep-slope, nonlinear adjustments,such as white LED brightness and audio volume control.The AD5254BRUZ100-RL7 have a patented resistance-tolerance storing function that allows the user to access the EEMEM and obtain the absolute end-to-end resistance values of the RDACs for precision applications. AD5254BRUZ100-RL7 Features •AD5253: quad 64-position resolution•AD5254: quad 256-position resolution•1 kΩ, 10 kΩ, 50 kΩ, 100 kΩ•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 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 kΩversion•Single supply 2.7 V to 5.5 V•Dual supply ±2.25 V to ±2.75 V•2 slave address-decodingbits allow operation of 4 devices•100-year typical data retention, TA= 55°C•Operating temperature: –40°C to +105°C AD5254BRUZ100-RL7 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
Features

Parameters

[{"Name":"Resistance:","Value":"100 kOhms"},{"Name":"Operating Supply Voltage:","Value":"6 V"},{"Name":"Supply Current:","Value":"3 uA"},{"Name":"Maximum Operating Temperature:","Value":"+ 85 C"},{"Name":" Minimum Operating Temperature:","Value":"- 40 C"},{"Name":"Supply Voltage - Max:","Value":"5.5 V"},{"Name":"Supply Voltage - Min:","Value":"2.7 V"},{"Name":"Tolerance:","Value":"30 %"},{"Name":"","Value":""},{"Name":"","Value":""}]

Manufacturer information

ACTEL CORPORATION
Warm Hint

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