The AD5273 is a 64-position, one-time programmable (OTP) digital potentiometer4 that employs fuse link technology to achieve permanent program setting. This device performs the same electronic adjustment function as most mechanical trimmers and variable resistors. It allows unlimited adjustments before permanently setting the resistance values. The AD5273 is programmed using a 2-wire, I2C®-compatible digital control. During write mode, a fuse blow command is executed after the final value is determined, thereby freezing the wiper position at a given setting (analogous to placing epoxy on a mechanical trimmer). When the permanent setting is achieved, the value does not change, regardless of the supply variations or environ-mental stresses under normal operating conditions. To verify the success of permanent programming, Analog Devices, Inc., patterned the OTP validation such that the fuse status can be discerned from two validation bits in the read mode.
In addition, for applications that program the AD5273 at the factory, Analog Devices offers device programming software2 running on Windows® NT®, Windows 2000, and Windows XP operating systems. This software application effectively replaces any external I2C controllers, which in turn enhances the user system’s time-to-market.p>
The AD5273 is available in 1 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ resistances and in a compact 8-lead SOT-23 standard package. It operates from −40°C to +105°C.
Along with its unique OTP feature, the AD5273 lends itself well to general digital potentiometer applications due to its effective resolution, array resistance options, small footprint, and low cost.
An AD5273 evaluation kit and software are available. The kit includes the connector and cable that can be converted for factory programming applications.
For applications that require dynamic adjustment of resistance settings with nonvolatile EEMEM, users should refer to the AD523x and AD525x families 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 kΩ parts only.
4 The terms digital potentiometer, VR, and RDAC are used interchangeably.
Data Sheet, Rev. G, 7/08
|Title||Content Type||File Type|
|AD5273: 64-Position OTP Digital Potentiometer Data Sheet (Rev H, 10/2010) (pdf, 830 kB)||Data Sheets|
|AN-1291: Digital Potentiometers: Frequently Asked Questions (pdf, 805 kB)||Application Notes|
|AN-686: Implementing an I2C® Reset (pdf, 44 kB)||Application Notes|
|Choosing the Correct digiPOT for Your Application (pdf, 431 kB)||Design Handbooks|
Webinar: Digital Potentiometers - Where and How to Use
Digital Potentiometers (digiPOTs) provide a convenient way to adjust the ac or dc voltage or current output of sensors, power supplies, or other devices that require some type of calibration. This webcast will describe the function, use and advantages of using digital potentiometers in various applications. The webinar will also highlight the main parameters to be considered when designing a circuit using a digital potentiometer.
Understanding and Applying Digital Potentiometers
In this webcast our experts will explain the differences between Pots and DigiPots and DACs, and present considerations for successful designs for many applications.
UG-395: Evaluation Board for the AD5273 Digital Potentiometer
(pdf, 634 kB)
This user guide refers to the EVAL-AD5273DBZ.
|Choosing the Correct digiPOT for Your Application (pdf, 431 kB)||Overview|
|Is there a power up sequence I should follow?||FAQs/RAQs||HTML|
|For dual supply digital potentiometers, if VDD/VSS are +2.5V/-2.5V respectively, can digital inputs be fed from a standard 3.3V CMOS logic component without logic level translation? What are the logic level thresholds when VDD is +2.5V and VSS is -2.5V?||FAQs/RAQs||HTML|
|Is there a dependency between the logic level and power consumption?||FAQs/RAQs||HTML|
|Is digital potentiometer a real replacement for mechanical potentiometer or are there restrictions regarding voltage potentials?||FAQs/RAQs||HTML|
|Are all digital potentiometers limited to |5V|?||FAQs/RAQs||HTML|
|Do digital potentiometers handle bipolar and AC operations?||FAQs/RAQs||HTML|
|Can I achieve a 15V signal swing when using a 5V digital potentiometer?||FAQs/RAQs||HTML|
|For digital potentiometers that do not have nonvolatile memory, what is the state during power up?||FAQs/RAQs||HTML|
|Is there a particularly low-power digital potentiometer?||FAQs/RAQs||HTML|
|Does the memory allow the device to return to the last stored value without an update from a micro?||FAQs/RAQs||HTML|
|Will the data in the EEMEM need to be refreshed after 15 yrs when it is operated at 55°C?||FAQs/RAQs||HTML|
|How many write cycles can the EEMEM go through before it fails?||FAQs/RAQs||HTML|
|After the specified EEMEM data retention timeout period, can the power be turned off and back on so that the part is considered "refreshed"?||FAQs/RAQs||HTML|
|Why are some digital potentiometers' maximum operating temperature only 85°C instead of the standard 125°C?||FAQs/RAQs||HTML|
|How good is the resistance matching between Ch1 and Ch2 in the dual digital potentiometer?||FAQs/RAQs||HTML|
|How is the resistance matching device to device?||FAQs/RAQs||HTML|
|What is the resistance tolerance of the digital potentiometers?||FAQs/RAQs||HTML|
|Can I cascade, serialize, or parallel multiple digital potentiometers to get the resistance or resolution I need? My requirement is for a 250 Ω digital potentiometer with approximately 1 Ω/step. I plan to use four 1 kΩ AD8403 in parallel with each set to nominally the same value.||FAQs/RAQs||HTML|
|I would like to know how the digital potentiometer is built. How ideal are the wiper switches?||FAQs/RAQs||HTML|
|What is the tempco of the digital potentiometer?||FAQs/RAQs||HTML|
|What is the maximum current I can force into the digital potentiometer?||FAQs/RAQs||HTML|
|Can a digitally controlled variable resistor withstand greater than 20mA?||FAQs/RAQs||HTML|
|Can a digipot be used to construct a programmable high current source?||FAQs/RAQs||HTML|
|If I use the digital potentiometer in a "dry" circuit (current through wiper < 1 pA), will it behave as a linear resistor in rheostat mode?||FAQs/RAQs||HTML|
|Are ADI's digital potentiometers suitable for use in photodetector amplifiers and will they suffer from leakage currents which could affect the gain of the circuit?||FAQs/RAQs||HTML|
|Regarding the spec on R-DNL, I am only concerned with relative adjustments. I'm not concerned with the actual value of the resistor in the digipot but need the digipot to be monotonic.||FAQs/RAQs||HTML|
|Can I adjust the digital potentiometer for frequencies around 1MHz to 10MHz for adjusting the gain of a video signal?||FAQs/RAQs||HTML|
|What is the maximum frequency that can be applied to the digital potentiometer CLK input?||FAQs/RAQs||HTML|
|Is there crosstalk between Ch1 and Ch2 of a dual digital potentiometer such that a sine wave applied to Ch1 will occur in Ch2 as well?||FAQs/RAQs||HTML|
|If I program Ch 1 from zero to full scale, will I expect Ch 2 to be disturbed?||FAQs/RAQs||HTML|
|How is the THD performance of digital potentiometer?||FAQs/RAQs||HTML|
|If I use the digital potentiometer in audio volume control, will I experience zipper noise?||FAQs/RAQs||HTML|
|For a digital potentiometer that requires 6-bit word length, what happens if I have 8-bit word length from my PC?||FAQs/RAQs||HTML|
|For a digital potentiometer that requires 12-bit word length, how can I control with only 8-bit word length from my micro?||FAQs/RAQs||HTML|
|Do you provide any software to control the digital potentiometers?||FAQs/RAQs||HTML|
|How do I daisy-chain multiple potentiometers? How does the serial interface work for multiple AD8403's when there are still only two address bits? Are there multiple /CS lines, one for each individual chip?||FAQs/RAQs||HTML|
|Can I program two channels of a multi-channel digital potentiometer at the same time?||FAQs/RAQs||HTML|
|Can I read back the wiper setting of the digital potentiometers?||FAQs/RAQs||HTML|
|Can I read back the contents of the two RDAC registers of AD5242 or AD5282 (dual I2C compatible digital potentiometer)?||FAQs/RAQs||HTML|
|Is there a digital potentiometer controlled by a parallel input?||FAQs/RAQs||HTML|
|Can digital potentiometers do log taper adjustment?||FAQs/RAQs||HTML|
|I'm unsure about how to use pin 13 write protect (/WP), pin 14 preset (/PR), and pin 16 ready (RDY)?||FAQs/RAQs||HTML|
|Why Should I replace mechanical potentiometers with digiPOT?||FAQs/RAQs||HTML|
|What should I watch out for when I replace mechanical potentiometers with digital potentiometers?||FAQs/RAQs||HTML|
|What is the ESD rating of digital potentiometers?||FAQs/RAQs||HTML|
|How do I tell the end-to-end RAB resistance value?||FAQs/RAQs||HTML|
|What are the common failure modes of digital potentiometers?||FAQs/RAQs||HTML|
|Are there any evaluation boards for the digital potentiometers?||FAQs/RAQs||HTML|
|Are PB-free digital potentiometers available?||FAQs/RAQs||HTML|
|Can I use the new PB-free DigiPOTs in my traditional solder based PCB assembly process?||FAQs/RAQs||HTML|
|Programmable 5-30V Power Supply||FAQs/RAQs||HTML|
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|Manual Push Button LED Driver||FAQs/RAQs||HTML|
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|Adjustable Current Source for Driving Single LED||FAQs/RAQs||HTML|
|Adjustable Current Source for Driving Multiple LEDs||FAQs/RAQs||HTML|
|Programmable Bidirectional Current Source||FAQs/RAQs||HTML|
|High Power RGB LEDs Driver||FAQs/RAQs||HTML|
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|Manual Rotary Control||FAQs/RAQs||HTML|
|Bipolar Programmable Gain Amplifier||FAQs/RAQs||HTML|
|Programmable Current-Sensing Amplifier||FAQs/RAQs||HTML|
|Level Shifting Digital Inputs from 3.3V to 5V or Vice Versa||FAQs/RAQs||HTML|
|Level Shifting Digital Signals from 0V to +5V to -5V to 0V||FAQs/RAQs||HTML|
|Multiple I2C Slave Devices Addressing||FAQs/RAQs||HTML|
|Pseudo Memory Retention||FAQs/RAQs||HTML|
|RAQs index||Rarely Asked Questions||HTML|
|Glossary of EE Terms||Glossary||HTML|
|Title||Content Type||File Type|
|Digital Potentiometer Linux Driver||Device Drivers||HTML|
The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.