Preliminary Technical Data 256-Position One-Time Programmable Dual-Channel I2C Digital Potentiometer AD5172/AD5173 FEATURES 2-Channel, 256-position OTP(One-Time Programmable) Set-and-Forget Resistance Setting -- low cost alternative over EEMEM Unlimited adjustments prior to OTP activation OTP overwriting function allows temporary adjustments1 End-to-end resistance 2.5 k, 10 k, 50 k, 100 k Compact MSOP-10 (3 mm x 4.9 mm) Package Low tempco 5 ppm/oC in potentiometer mode Low tempco 35 ppm/C in rheostat mode Fast Settling Time: tS = 5s Typ in Power-Up Full read/write of wiper register Power-on preset to midscale1 Extra package address decode pins AD0 and AD1(AD5173) Computer Software Replaces C in Factory Programming Applications 6 V one-time programming voltage Single supply 2.7 V to 5.5 V Low power, IDD = 5 A Wide operating temperature -40C to +125C APPLICATIONS Systems Calibrations Mechanical Potentiometers and Trimmers(R) Replacements Transducer adjustment RF amplifier biasing Automotive electronics adjustment Gain control and offset adjustment Electronics Level Settings The AD5172/73 are programmed using a 2-wire I2C compatible digital control. They allow unlimited adjustments before permanently setting the resistance value. During the OTP activation, a permanent fuse blown command is sent after the final value is determined; therefore freezing the wiper position at a given setting (analogous to placing epoxy on a mechanical trimmer). Unlike other OTP digital potentiometers in the same family, AD5172/73 have unique temporary OTP overwriting feature that new adjustments if desired but the OTP setting is restored during subsequent power up conditions. To verify the success of permanent programming, Analog Devices patterned the OTP validation such that the fuse status can be discerned from two validation bits in read mode. For applications that program AD5172/73 in the factories, Analog Devices offers a device programming software, which operates across Windows(R) 95 to XP(R) platforms including Windows NT(R). This software application effectively replaces the need for external I2C controllers or host processors and therefore significantly reduces users' development time. An AD5172/73 evaluation kit is available, which include the software, connector, and cable that can be converted for the factory programming applications. The AD5172/73 are available in a MSOP-10 package. All parts are guaranteed to operate over the automotive temperature range of -40C to +125C. Besides their unique OTP features, the AD5172/73 lend themselves well to other general-purpose digital potentiometer applications due to their programmable preset, superior temperature stability, and small form factor. FUNCTIONAL BLOCK DIAGRAMS A1 W1 B1 A2 W2 B2 GENERAL OVERVIEW The AD5172/73 are dual channel 256-position, one-time programmable (OTP) digital potentiometers2, which employ fuse link technology to achieve the memory retention of resistance setting function. OTP is a cost-effective alternative over the EEMEM approach for users who do not need to program the digital potentiometer setting in memory for more than once. These devices perform the same electronic adjustment functions like most mechanical trimmers and variable resistors do but offer enhanced resolution, solid-state reliability, and superior low temperature coefficient performance. VDD GND 1 FUSE LINKS RDAC REGISTER 1 2 RDAC REGISTER 2 8 SDA SCL SERIAL INPUT REGISTER Figure 1. AD5172 Rev. PrF 8/14/03 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. www.analog.com Tel: 781.329.4700 Fax: 781.326.8703 (c) 2003 Analog Devices, Inc. All rights reserved. AD5172/AD5173 Preliminary Technical Data OUTLINE DIMENSIONS 3.00 BSC 10 6 4.90 BSC 3.00 BSC 1 5 PIN 1 0.50 BSC 0.95 0.85 0.75 1.10 MAX 0.15 0.00 0.27 0.17 SEATING PLANE 0.23 0.20 0.17 8 0 0.80 0.40 COPLANARITY 0.10 COMPLIANT TO JEDEC STANDARDS MO-187BA Figure 54. 10-Lead Mini Small Outline Package [MSOP] (RM-10) Dimensions shown in millimeters ORDERING GUIDE Model AD5172BRM2.5-R2 AD5172BRM2.5-RL7 AD5172BRM10-R2 AD5172BRM10-RL7 AD5172BRM50-R2 AD5172BRM50-RL7 AD5172BRM100-R2 AD5172BRM100-RL7 AD5172EVAL RAB () 2.5k 2.5k 10k 10k 50k 50k 100k 100k See Note 1 Temperature -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C Package Description MSOP-10 MSOP-10 MSOP-10 MSOP-10 MSOP-10 MSOP-10 MSOP-10 MSOP-10 Evaluation Board Package Option RM-10 RM-10 RM-10 RM-10 RM-10 RM-10 RM-10 RM-10 Branding D0U D0U D0V D0V D10 D10 D11 D11 Model AD5173BRM2.5-R2 AD5173BRM2.5-RL7 AD5173BRM10-R2 AD5173BRM10-RL7 AD5173BRM50-R2 AD5173BRM50-RL7 AD5173BRM100-R2 AD5173BRM100-RL7 AD5173EVAL RAB () 2.5k 2.5k 10k 10k 50k 50k 100k 100k See Note 1 Temperature -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C Package Description MSOP-10 MSOP-10 MSOP-10 MSOP-10 MSOP-10 MSOP-10 MSOP-10 MSOP-10 Evaluation Board Package Option RM-10 RM-10 RM-10 RM-10 RM-10 RM-10 RM-10 RM-10 Branding D1K D1K D1L D1L D1M D1M D1N D1N 1 The evaluation board is shipped with the 10 k RAB resistor option; however, the board is compatible with all available resistor value options. ESD CAUTION ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although this product features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality. NOTES Rev. PrF 8/14/03 | Page 19 of 19