Quad-Channel Digital Potentiometer Fits High Reliability In Small Package

The quad-channel AD5263 is a 15-V, 256-position digital potentiometer with a selectable digital interface. Controlled from a pin-selectable three-wire serial peripheral interface (SPI) or a two-wire I²C-compatible data interface, the potentiometer performs the same electronic adjustment function as a mechanical trimmer, variable resistor, or potentiometer, with higher reliability and smaller size. The device can use a single 15-V supply with 0- to 15-V signals or a dual ±5-V supply with ±5-V signals. Each of the AD5263's four channels contains a fixed resistor rated at 20, 50, or 200 k‡. In the I²C interface mode, the reset and shutdown functions can be individually set for each wiper, and the microcontroller can read back the current wiper position. The AD5263's low 50-ppm/°C temperature coefficient suits it for a variety of applications, including optical network laser-diode adjustment, gain and offset adjustment in instrumentation, multichannel audio level control, line impedance matching, and programmable voltage-to-current conversion. It comes in a thin, narrow TSSOP-24 package and operates over the extended automotive temperature range of -40°C to 125°C. In 1000-unit quantities, the AD5263 costs $3.16 each.

Analog Devices Inc.
www.analog.com; (800) ANALOG-D