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EVAL-AD5247DBZ

EVAL-AD5247DBZ electronic component of Analog Devices

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Digital Potentiometer Development Tools EVALUATION BOARD I.C.

Manufacturer: Analog Devices
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1: USD 83.6719 ea
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EVAL-AD5247DBZ
Analog Devices

1 : USD 88.7204

     
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2 128-Position I C-Compatible Digital Potentiometer Data Sheet AD5247 FEATURES FUNCTIONAL BLOCK DIAGRAM V DD 128 positions End-to-end resistance: 5 k, 10 k, 50 k, 100 k A Ultracompact, SC70-6 (2 mm 2.1 mm) package SDA 2 I C INTERFACE 2 I C-compatible interface SCL Full read/write of wiper register W Power-on preset to midscale Single-supply 2.7 V to 5.5 V WIPER REGISTER Rheostat mode temperature coefficient: 45 ppm/C B Low power, I = 0.9 A at 3.3 V typical DD Wide operating temperature range: 40C to +125C GND APPLICATIONS Figure 1. Mechanical potentiometer replacement in new designs Transducer adjustment of pressure, temperature, position, chemical, and optical sensors RF amplifier-biasing LCD brightness and contrast adjustment Automotive electronics adjustment Gain control and offset adjustment have three hard-coded slave address options available to allow 2 GENERAL DESCRIPTION users access to three of these devices on one I C bus (see Table 8 for a full list of slave address locations). The AD5247 provides a compact, 2 mm 2.1 mm, packaged solution for 128-position adjustment applications. This device The resistance between the wiper and either end point of performs the same electronic adjustment function as a mechanical the fixed resistor varies linearly with respect to the digital potentiometer or a variable resistor. Available in four different code transferred into the RDAC latch. Note the terms digital end-to-end resistance values (5 k, 10 k, 50 k, and 100 k), potentiometer, VR (variable resistor), and RDAC are used these low temperature coefficient devices are ideal for high interchangeably in this document. accuracy and stability variable resistance adjustments. Operating from a 2.7 V to 5.5 V power supply and consuming 2 The wiper settings are controllable through the I C-compatible 0.9 A (3.3 V) allows the AD5247 to be used in portable digital interface, which can also be used to read back the present battery-operated applications. wiper register control word. The 10 k and 100 k options each Rev. F 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 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. No Tel: 781.329.4700 www.analog.com 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 owners. Fax: 781.461.3113 20032012 Analog Devices, Inc. All rights reserved. 03876-001AD5247 Data Sheet TABLE OF CONTENTS 2 Features .............................................................................................. 1 I C Interface .................................................................................... 13 Applications ....................................................................................... 1 Theory of Operation ...................................................................... 14 Functional Block Diagram .............................................................. 1 Programming the Variable Resistor ......................................... 14 General Description ......................................................................... 1 Programming the Potentiometer Divider ............................... 15 2 Revision History ............................................................................... 2 I C-Compatible 2-Wire Serial Bus ........................................... 15 Specifications ..................................................................................... 3 Level Shifting for Bidirectional Interface ................................ 16 Electrical Characteristics5 k Version .................................. 3 ESD Protection ........................................................................... 16 Electrical Characteristics10 k, 50 k, and 100 k Terminal Voltage Operating Range ......................................... 16 Versions .......................................................................................... 4 Maximum Operating Current .................................................. 16 Timing Characteristics5 k, 10 k, 50 k, and 100 k Power-Up Sequence ................................................................... 16 Versions .......................................................................................... 5 Layout and Power Supply Bypassing ....................................... 17 Absolute Maximum Ratings ............................................................ 6 Constant Bias to Retain Resistance Setting ............................. 17 ESD Caution .................................................................................. 6 Outline Dimensions ....................................................................... 18 Pin Configuration and Function Descriptions ............................. 7 Ordering Guide .......................................................................... 18 Typical Performance Characteristics ............................................. 8 Test Circuits ..................................................................................... 12 REVISION HISTORY 5/12Rev. E to Rev. F 3/07Rev. A to Rev. B Changes to Features and General Description Sections .............. 1 Changes to General Description Section ....................................... 1 Changes to IDD Parameters, Table 1 ................................................ 3 Added Table 8 ................................................................................. 13 2 Changes to IDD Parameters, Table 2 ................................................ 4 Changes to I C-Compatible 2-Wire Serial Bus Section ............ 15 Changes to Figure 15 ........................................................................ 9 Changes to Ordering Guide .......................................................... 18 Changes to Figure 16 ...................................................................... 10 7/06Rev. 0 to Rev. A Removed Evaluation Board Section ............................................. 17 Updated Format .................................................................. Universal Changes to Ordering Guide .......................................................... 18 Changes to Absolute Maximum Ratings section .......................... 6 1/11Rev. D to Rev. E Changes to Ordering Guide .......................................................... 18 Change to Table 1, Added Output Logic Low .............................. 3 9/03Revision 0: Initial Version Change to Table 2, Added Output Logic Low .............................. 4 3/10Rev. C to Rev. D Changes to Table 9 and Table 10 ................................................... 14 10/09Rev. B to Rev. C Changes to Zero-Scale Error (10 k) P arameter, Table 2 ........... 4 Changes to Ordering Guide .......................................................... 18 Rev. F Page 2 of 20

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