Add to Signal Chain Designer

AD5172:  256-Position, One-Time Programmable, Dual Channel, I2C Digital Potentiometer

Product Details


The AD5172/AD5173 are dual-channel, 256-position, one-time programmable (OTP) digital potentiometers1 that employ fuse link technology to achieve memory retention of resistance settings. OTP is a cost-effective alternative to EEMEM for users who do not need to program the digital potentiometer setting in memory more than once. These devices perform the same electronic adjustment function as mechanical potentiometers or variable resistors with enhanced resolution, solid-state reliabil-ity, and superior low temperature coefficient performance.

The AD5172/AD5173 are programmed using a 2-wire, I2C®-compatible digital interface. Unlimited adjustments are allowed before permanently setting the resistance value. During OTP activation, a permanent blow fuse command freezes the wiper position (analogous to placing epoxy on a mechanical trimmer).

Unlike traditional OTP digital potentiometers, the AD5172/ AD5173 have a unique temporary OTP overwrite feature that allows for new adjustments even after a fuse is blown. However, the OTP setting is restored during subsequent power-up condi-tions. This allows users to treat these digital potentiometers as volatile potentiometers with a programmable preset.

Applications

  • Systems calibration
  • Electronics level setting
  • Mechanical trimmers replacement in new designs
  • Permanent factory PCB setting
  • Transducer adjustment of pressure, temperature, position, chemical, and optical sensors
  • RF amplifier biasing
  • Automotive electronics adjustment
  • Gain control and offset adjustment

1 The terms digital potentiometer, VR, and RDAC are used interchangeably.

FEATURES and BENEFITS

  • 2-channel, 256-position potentiometers
  • One-time programmable (OTP) set-and-forget resistance setting provides a low cost alternative to EEMEM
  • Unlimited adjustments prior to OTP activation
  • OTP overwrite allows dynamic adjustments with user-defined preset
  • End-to-end resistance: 2.5 kΩ, 10 kΩ, 50 kΩ, 100 kΩ
  • Compact 10-lead MSOP: 3 mm × 4.9 mm
  • Fast settling time: tS = 5 μs typical in power-up
  • See Data Sheet for Additional Information

Functional Block Diagram for AD5172

Similar Products

  • AD5170: 256-Position, Two-Time Programmable, I2C Compatible Digital Potentiometer
  • AD5171: 64 Position OTP Digital Potentiometer
  • AD5173: 256-Position, One-Time Programmable, Dual Channel, I2C Digital Potentiometer
More

Additional Evaluation Board Information

If you purchase the evaluation board model of this product, you will also need the System Demonstration Platform (SDP). They are used in conjunction as part of a customer evaluation environment.

Documentation

Title Content Type File Type
AD5172/AD5173: 256-Position, One-Time Programmable, Dual-Channel, I2C Digital Potentiometers Data Sheet  (Rev I, 08/2013) (pdf, 869 kB) Data Sheets PDF
AN-1291: Digital Potentiometers: Frequently Asked Questions  (pdf, 805 kB) Application Notes PDF
AN-686: Implementing an I2C® Reset  (pdf, 44 kB) Application Notes PDF
Choosing the Correct digiPOT for Your Application  (pdf, 431 kB) Design Handbooks PDF
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.
Webcasts WEBCAST
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.
Webcasts WEBCAST
UG-243: Evaluation Board for the AD5172 Digital Potentiometer  (pdf, 993 kB) User Guides PDF
Choosing the Correct digiPOT for Your Application  (pdf, 431 kB) Overview PDF
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
Digital Feedthrough 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
Programmable LDO with Precision FAQs/RAQs HTML
Manual Push Button LED Driver FAQs/RAQs HTML
Adjustable Voltage Source for Driving LED FAQs/RAQs HTML
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
Automatic LED Brightness Control FAQs/RAQs HTML
High Voltage DAC FAQs/RAQs HTML
Bipolar DAC with EEPROM FAQs/RAQs HTML
Voltage-to-Current Conversion FAQs/RAQs HTML
Programmable Low Pass Filter FAQs/RAQs HTML
Programmable State-Variable Filter FAQs/RAQs HTML
Programmable Oscillator FAQs/RAQs HTML
Audio Volume Control FAQs/RAQs HTML
Audio Amplifier Volume Control FAQs/RAQs HTML
LCD Panel VCOM Adjustment FAQs/RAQs HTML
Laser Bias and Modulation Current Biasing FAQs/RAQs HTML
Manual Rotary Control FAQs/RAQs HTML
Bipolar Programmable Gain Amplifier FAQs/RAQs HTML
Programmable Current-Sensing Amplifier FAQs/RAQs HTML
6-Bit Controller 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
Resolution Enhancement FAQs/RAQs HTML
Pseudo Memory Retention FAQs/RAQs HTML
RAQs index Rarely Asked Questions HTML
Glossary of EE Terms Glossary HTML

Evaluation Kits & Symbols & Footprints

Evaluation Boards & KitsView the Evaluation Boards and Kits page for documentation and purchasing

Symbols and Footprints— Analog Devices offers Symbols & Footprints which are compatible with a large set of today’s CAD systems for broader and easier support.

SampleSample & Buy

Price, packaging, availability

AD5172 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
AD5172BRM10 Status: Production 10 ld MSOP 10 Ind Tube, 50 $1.68 $1.52 N  Material Info PCN Purchase
AD5172BRM10-RL7 Status: Last Time Buy 10 ld MSOP 10 Ind Reel, 1000 $1.68 $1.52 N  Material Info PCN/PDN Purchase
AD5172BRM100 Status: Production 10 ld MSOP 10 Ind Tube, 50 $1.68 $1.52 N  Material Info PCN Purchase
AD5172BRM2.5 Status: Production 10 ld MSOP 10 Ind Tube, 50 $1.68 $1.52 N  Material Info PCN Purchase
AD5172BRM2.5-RL7 Status: Production 10 ld MSOP 10 Ind Reel, 1000 - $1.52 N  Material Info PCN Purchase
AD5172BRM50 Status: Last Time Buy 10 ld MSOP 10 Ind Tube, 50 $1.68 $1.52 N  Material Info PCN/PDN Purchase
AD5172BRMZ10 Status: Production 10 ld MSOP 10 Ind Tube, 50 $1.46 $1.32 Y  Material Info PCN Purchase Sample
AD5172BRMZ10-RL7 Status: Production 10 ld MSOP 10 Ind Reel, 1000 - $1.32 Y  Material Info PCN Purchase
AD5172BRMZ100 Status: Production 10 ld MSOP 10 Ind Tube, 50 $1.46 $1.32 Y  Material Info PCN Purchase Sample
AD5172BRMZ100-RL7 Status: Production 10 ld MSOP 10 Ind Reel, 1000 - $1.32 Y  Material Info PCN Purchase
AD5172BRMZ2.5 Status: Production 10 ld MSOP 10 Ind Tube, 50 $1.46 $1.32 Y  Material Info PCN Purchase
AD5172BRMZ50 Status: Production 10 ld MSOP 10 Ind Tube, 50 $1.46 $1.32 Y  Material Info PCN Purchase
AD5172BRMZ50-RL7 Status: Production 10 ld MSOP 10 Ind Reel, 1000 - $1.32 Y  Material Info PCN Purchase
Price Table Help

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.

AD5172 Evaluation Board
Model Description Price RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
EVAL-AD5172SDZ Status: Production Evaluation Board $59.00 Yes -
EVAL-SDP-CB1Z Status: Production SDP-B Controller Board (also required) $99.00 Yes -

Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.

Check Inventory & Purchase

View Sales and Distribution Offices

沪ICP备09046653号
content here.
content here.

Review this Product

Close