Part # AD5246 datasheet

Part Manufacturer: Analog Devices

Analog Devices

Part Description: AD5246 128-Position I2C Compatible Digital Resistor Data Sheet (Rev. A)

Part Details:

128-Position I2C-Compatible Digital Resistor AD5246 FEATURES FUNCTIONAL BLOCK DIAGRAM 128-position VDD End-to-end resistance 5 k, 10 k, 50 k, 100 k Ultracompact SC70-6 (2 mm × 2.1 mm) package SCL I2C® compatible interface I2C INTERFACE A SDA Full read/write of wiper register W Power-on preset to midscale Single supply 2.7 V to 5.5 V WIPER B Low temperature coefficient 45 ppm/°C REGISTER Low power, IDD = 3 A typical Wide operating temperature ­40°C to +125°C 03875-001 GND Evaluation board available Available in lead-free (Pb-free) package Figure 1. APPLICATIONS Mechanical potentiometer replacement in new designs Transducer adjustment of pressure, temperature, position, chemical, and optical sensors RF amplifier biasing Automotive electronics adjustment Gain control and offset adjustment GENERAL OVERVIEW The AD5246 provides a compact 2 mm × 2.1 mm packaged solution for 128-position adjustment applications. This device performs the same electronic adjustment function as a variable resistor. Available in four different end-to-end resistance values (5 k, 10 k, 50 k, 100 k), these low temperature coefficient devices are ideal for high accuracy and stability variable resistance adjustments. The wiper settings are controllable through the I2C compatible digital interface, which can also be used to read back the present wiper register control word. The resistance between the wiper and either end point of the fixed resistor varies linearly with respect to the digital code transferred into the RDAC1 latch. Operating from a 2.7 V to 5.5 V power supply and consuming 3 A allows for usage in portable battery-operated applications. 1 The terms digital potentiometer, VR, and RDAC are used interchangeably in this document. Rev. A Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. or otherwise under any patent or patent rights of Analog Devices. Trademarks and Tel: 781.329.4700 registered trademarks are the property of their respective owners. Fax: 781.461.3113 © 2005 Analog Devices, Inc. All rights reserved.

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AD5246.pdf Datasheet