64-Position OTP Digital Potentiometer Data Sheet AD5273 FEATURES FUNCTIONAL BLOCK DIAGRAM 64 positions SCL A 1 One-time programmable (OTP) set-and-forget 2 I C INTERFACE SDA AND Resistance settinglow cost alternative over EEMEM CONTROL LOGIC W Unlimited adjustments prior to OTP activation 1 k, 10 k, 50 k, 100 k end-to-end terminal resistance AD0 B Compact 8-lead SOT-23 standard package AD5273 Ultralow power: I = 5 A maximum DD Fast settling time: t = 5 s typical during power-up WIPER S V DD REGISTER 2 I C-compatible digital interface 2 GND FUSE Computer software replaces microcontroller in LINK factory programming applications Wide temperature range: 40C to +105C Figure 1. Low operating voltage: 2.7 V to 5.5 V OTP validation check function APPLICATIONS System calibrations Electronics level settings Mechanical potentiometers and trimmer replacement In addition, for applications that program the AD5273 at the 2 Transducer circuit adjustments factory, Analog Devices offers device programming software 3 Programmable filters up to 6 MHz BW running on Windows NT, Windows 2000, and Windows XP operating systems. This software application effectively replaces GENERAL DESCRIPTION 2 any external I C controllers, which in turn enhances the user The AD5273 is a 64-position, one-time programmable (OTP) systems time-to-market. 4 digital potentiometer that employs fuse link technology to The AD5273 is available in 1 k, 10 k, 50 k, and 100 k achieve permanent program setting. This device performs the resistances and in a compact 8-lead SOT-23 standard package. same electronic adjustment function as most mechanical It operates from 40C to +105C. trimmers and variable resistors. It allows unlimited adjustments Along with its unique OTP feature, the AD5273 lends itself before permanently setting the resistance values. The AD5273 is 2 well to general digital potentiometer applications due to its programmed using a 2-wire, I C-compatible digital control. effective resolution, array resistance options, small footprint, During write mode, a fuse blow command is executed after the and low cost. final value is determined, thereby freezing the wiper position at a given setting (analogous to placing epoxy on a mechanical An AD5273 evaluation kit and software are available. The kit trimmer). When the permanent setting is achieved, the value includes the connector and cable that can be converted for does not change, regardless of the supply variations or environ- factory programming applications. mental stresses under normal operating conditions. To verify For applications that require dynamic adjustment of resistance the success of permanent programming, Analog Devices, Inc., settings with nonvolatile EEMEM, refer to the AD5231, AD5232, patterned the OTP validation such that the fuse status can be AD5233, and AD5235 family, and the AD5251, AD5252, AD5254, discerned from two validation bits in the read mode. AD5258, and AD5259 family of nonvolatile memory digital potentiometers. 1 OTP allows unlimited adjustments before permanent setting. 2 Analog Devices cannot guarantee the software to be 100% compatible to all systems due to the wide variation in computer configurations. 3 Applies to 1 k p arts only. 4 The terms digital potentiometer, VR, and RDAC are used interchangeably. Rev. J Document Feedback 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 20022015 Analog Devices, Inc. All rights reserved. license is granted by implication or otherwise under any patent or patent rights of Analog Devices. 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Technical Support www.analog.com 03224-001AD5273 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Power-Up/Power-Down Sequences ......................................... 15 Applications ....................................................................................... 1 Power Supply Considerations ................................................... 15 General Description ......................................................................... 1 Controlling the AD5273 ................................................................ 16 2 Functional Block Diagram .............................................................. 1 I C Controller Programming .................................................... 16 Revision History ............................................................................... 2 Controlling Two Devices on One Bus ..................................... 17 Specif icat ions ..................................................................................... 4 Applications Information .............................................................. 18 Absolute Maximum Ratings ............................................................ 6 DAC .............................................................................................. 18 ESD Caution .................................................................................. 6 Programmable Voltage Source with Boosted Output ........... 18 Pin Configuration and Function Descriptions ............................. 7 Programmable Current Source ................................................ 18 Typical Performance Characteristics ............................................. 8 Gain Control Compensation .................................................... 18 Theory of Operation ...................................................................... 13 Programmable Low-Pass Filter ................................................ 19 One-Time Programming ........................................................... 13 Level Shift for Different Voltages Operation .......................... 19 Variable Resistance and Voltage for Rheostat Mode ............. 14 RDAC Circuit Simulation Model ............................................. 19 Variable Resistance and Voltage for Potentiometer Mode .... 14 Outline Dimensions ....................................................................... 20 ESD Protection ........................................................................... 15 Ordering Guide .......................................................................... 20 Terminal Voltage Operating Range .......................................... 15 REVISION HISTORY 6/15Rev. I to Rev. J 8/08Rev. F to Rev. G Changes to Table 3 ............................................................................ 7 Changes to Power Supplies Parameter in Table 1 ......................... 3 Changes to One-Time Programming Section ............................ 13 Updated Fuse Blow Condition to 400 ms Throughout ................ 5 Changes to Power Supply Considerations Section ..................... 15 1/08Rev. E to Rev. F 6/15Rev. H to Rev. I Changes to Table 1 ............................................................................. 4 Changes to Applications Section and General Description Changes to Table 2 ............................................................................. 6 Section ................................................................................................ 1 Changes to Table 3 ............................................................................. 7 Changes to OTP Supply Current Parameter, Table 1 ................... 4 Inserted Figure 28 ........................................................................... 12 Changes to Controlling the AD5273 Section ............................. 16 Changes to One-Time Programming Section ............................ 13 Deleted Software Programming Section, Write Section, and Changes to Power Supply Considerations Section .................... 15 Read Section .................................................................................... 16 Deleted Figure 35............................................................................ 15 Deleted Figure 39, Figure 40, and Figure 41 Renumbered Changes to Figure 36...................................................................... 15 Sequentially ..................................................................................... 16 Updated Outline Dimensions ....................................................... 22 Changed ADR370 to ADR3420 .................................................... 19 Changes to Ordering Guide .......................................................... 22 Deleted Evaluation Board Section ................................................ 20 Deleted Figure 53 to Figure 55 ...................................................... 21 1/05Rev. D to Rev. E Changes to Ordering Guide .......................................................... 21 Changes to Features .......................................................................... 1 Changes to Specifications ................................................................. 3 10/10Rev. G to Rev. H Changes to Table 3 ............................................................................. 6 Changes to OTP Power Supply Parameter in Table 1 .................. 4 Changes to Power Supply Considerations Section .................... 15 Changes to VDD Pin Description in Table 3................................... 7 Changes to Figure 35 and Figure 37 ............................................ 15 Changes to One-Time Programming Section ............................ 13 Changes to DAC Section ............................................................... 19 Changes to Power Supply Considerations Section, Figure 38 .. 15 Changes to Level Shift for Different Voltages Updated Outline Dimensions ....................................................... 22 Operation Section........................................................................... 20 Deleted the Resistance Scaling Section ....................................... 20 Changes to Ordering Guide .......................................................... 22 Deleted the Resolution Enhancement Section ........................... 20 Rev. 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