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Product category: Analogue and Mixed Signal ICs
News Release from: Analog Devices | Subject: AD5263
Edited by the Electronicstalk Editorial Team on 13 September 2002

Wide operating voltage
range for digital pot

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Analog Devices reckons the AD5263 digital potentiometer is the industry's first +15V quad-channel 256-position potentiometer with a selectable digital interface

A single +15V supply can be used with 0-15V signals, or a dual +/-5V supply can be used with +/-5V signals. Controlled from a pin-selectable three-wire SPI or a two-wire I2C-compatible data interface, the AD5263 performs the same electronic adjustment function as a mechanical trimmer, variable resistor or potentiometer, but provides higher reliability and smaller size.

Each of the four channels in the AD5263 contain a fixed resistor (20, 50 or 200kohm) with a wiper contact that taps the fixed resistor at a point determined by the digital code loaded into its register.

The AD5263 places the wiper in the midscale position at power on.

A hardware override shutdown feature shorts the wiper to the A-terminal, and open circuits the B-terminal - without disturbing the wiper register contents.

In the I2C interface mode, reset and shutdown can be individually set for each wiper, and the current wiper position can be read back by the microcontroller.

With a low temperature coefficient of 50ppm/C, this digital potentiometer is used for a wide variety of demanding applications such as: optical network laser diode adjustment, gain and offset adjustment in instrumentation, multi-channel audio level control, line impedance matching and programmable voltage to current conversion.

The AD5263 is available now in a thin, narrow body TSSOP-24 package, operates over the extended automotive temperature range of -40 to +125C, and is priced at $3.16 per unit in 1000-piece quantities.

For single- or dual-channel applications, see the companion AD5260, AD5262, AD5280 and AD5282.

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