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AD5161BRM50 Folha de dados(PDF) 1 Page - Analog Devices |
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AD5161BRM50 Folha de dados(HTML) 1 Page - Analog Devices |
1 / 20 page 256-Position SPI/I2C Selectable Digital Potentiometer AD5161 Rev. 0 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 or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective companies. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.326.8703 © 2003 Analog Devices, Inc. All rights reserved. FEATURES 256-position End-to-end resistance 5 kΩ, 10 kΩ, 50 kΩ, 100 kΩ Compact MSOP-10 (3 mm × 4.9 mm) package Pin selectable SPI/I2C compatible interface Extra package address decode pin AD0 Full read/write of wiper register Power-on preset to midscale Single supply 2.7 V to 5.5 V Low temperature coefficient 45 ppm/°C Low power, IDD = 8 µA Wide operating temperature –40°C to +125°C SDO output allows multiple device daisy-chaining Evaluation board available 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 AD5161 provides a compact 3 mm × 4.9 mm packaged solution for 256-position adjustment applications. These devices perform the same electronic adjustment function as mechanical potentiometers or variable resistors, with enhanced resolution, solid-state reliability, and superior low temperature coefficient performance. The wiper settings are controllable through a pin selectable SPI or I2C compatible digital interface, which can also be used to read back the wiper register content. When the SPI mode is used, the device can be daisy-chained (SDO to SDI), allowing several parts to share the same control lines. In the I2C mode, address pin AD0 can be used to place up to two devices on the same bus. In this same mode, command bits are available to reset the wiper position to midscale or to shut down the device into a state of zero power consumption. Operating from a 2.7 V to 5.5 V power supply and consuming less than 5 µA allows for usage in portable battery-operated applications. FUNCTIONAL BLOCK DIAGRAM WIPER REGISTER SDI/SDA CLK/SCL DIS CS/AD0 GND SDO/NC VDD A W B SPI OR I2C INTERFACE Figure 1. PIN CONFIGURATION 1 2 3 4 5 10 9 8 7 6 A B CS/ADO SDO/NC SDI/SDA DD AD5161 TOP VIEW (Not to Scale) W V DIS GND CLK/SCL Figure 2. Note: The terms digital potentiometer, VR, and RDAC are used interchangeably. Purchase of licensed I 2C components of Analog Devices or one of its sublicensed Associated Companies conveys a license for the purchaser under the Philips I 2C Patent Rights to use these components in an I 2C system, provided that the system conforms to the I 2C Standard Specification as defined by Philips. |
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