256-Position I2C Compatible Digital Potentiometer - ON Semiconductor - #1

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© Semiconductor Components Industries, LLC, 2009 August, 2009 - Rev. 1 1 Publication Order Number: CAT5171/D CAT5171 256-Position I2C Compatible Digital Potentiometer The CAT5171 is a 256-position digitally programmable linear taper potentiometer ideally suited for replacing mechanical potentiometers and variable resistors. The wiper settings are controlled through an I2C-compatible digital interface. Upon power-up, the wiper assumes a midscale position and may be repositioned anytime after the power is stable. The device can be programmed to reset the wiper position to midscale or to go to a shutdown state during operation. An address input pin, AD0, allows the connection of two devices onto the same I2C bus. The CAT5171 operates from 2.7 V to 5.5 V, while consuming less than 2 A. This low operating current, combined with a small package footprint, makes the CAT5171 ideal for battery-powered portable applications. The CAT5171, designed as a pin for pin replacement for the AD5245, is offered in the 8-lead SOT23 package and operates over the -40°C to +85°C industrial temperature range. Features • 256-position • End-to-End Resistance: 50 k, 100 k • I2C Compatible Interface • Power-on Preset to Midscale • Single Supply 2.7 V to 5.5 V • Low Temperature Coefficient 100 ppm/°C • Low Power, IDD 2 A max • Wide Operating Temperature -40°C to +85°C • RoHS-compliant SOT-23 8-Lead (2.9 mm x 3 mm) Package Typical Applications • Potentiometer Replacement • Transducer Adjustment of Pressure, Temperature, Position, Chemical, and Optical Sensors • RF Amplifier Biasing • Gain Control and Offset Adjustment http://onsemi.com PIN CONNECTIONS SDA AD0 B A SCL GND VDD W 1 (Top View) See detailed ordering and shipping information in the package dimensions section on page 2 of this data sheet. ORDERING INFORMATION SOT23-8 TP, TB SUFFIX CASE 527AK AF = 50 k AG = 100 k Y = Production Year Y = (Last Digit) M = Production Month M = (1 - 9, A, B, C) AFYM MARKING DIAGRAM 1 AGYM 1