Add to Signal Chain Designer

AD5222:  Dual, Increment/Decrement Digital Potentiometer

Product Details


The AD5222 contains two, 128-position, digitally-controlled variable resistors (VR). This part performs the same electronic adjustment function as a potentiometer, trimmer, or variable resistor. . The fixed A-to-B terminal resistance of 10 K, 50 K, 100 K, or 1 M Ohm has a 1% channel-to-channel matching tolerance with a nominal temperature coefficient of -300 ppm/°C. These products were optimized for portable instrument and test equipment "push button" applications.

The chip select CS, count CLK and U/D direction control inputs set the variable resistor position. A MODE control determines whether both VRs are incremented together or independently. With MODE at logic zero, both wipers are incremented UP or DOWN without changing the relative settings between the wipers. The relative ratio between the wipers is preserved if either wiper reaches the end of the resistor array. In the independent MODE (logic one) only the VR determined by the DACSEL pin is changed. This simple "push button" controlled interface eliminates the need for Micro Controllers in front panel interface designs.

The AD5222 is available in the surface mount (SO-14) package. For ultra compact solutions selected models are available in the thin TSSOP-14 package. All parts are guaranteed to operate over the extended industrial temperature range of -40°C to +85°C. For 3-wire, SPI compatible interface applications, see the AD5203/AD5206/AD7376/AD8400/AD8402/AD8403 products.

FEATURES and BENEFITS

  • 128 Position
  • Potentiometer Replacement
  • 10K, 50K, 100K, 1M Ohm
  • Very Low Power - 40 µA Max
  • Increment/Decrement Count Control
  • +3 to +5V Single-Supply;
    Or ±2.7V Dual-Supply Operation
  • Internal Power ON Mid-Scale Preset

Functional Block Diagram for AD5222

AD5222 Diagram
Functional Block Diagram for AD5222

Similar Products

  • AD5207: Dual, 256 Position, Digital Potentiometer
  • AD5242: Dual-Channel, I2C® Compatible, 256 Position, Digital Potentiometer
  • AD5262: +15 V or ±5 V, Dual-Channel, SPI Compatible, 256 Position Digital Potentiometer
More

Documentation

Title Content Type File Type
AD5222: Increment/Decrement Dual Digital Potentiometer Data Sheet  (Rev 0, 11/1999) (pdf, 173 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
AN-582: Resolution Enhancements of Digital Potentiometers with Multiple Devices  (pdf, 135 kB)
Digital Potentiometers Can Be Paralleled, Stacked or Cascaded to Optimize Resolution.
Application Notes PDF
AN-580: 0: Programmable Oscillator Uses Digital Potentiometers  (pdf, 52 kB) Application Notes PDF
Choosing the Correct digiPOT for Your Application  (pdf, 431 kB) Design Handbooks PDF
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-349: Evaluation Board for the AD5222 Digital Potentiometer  (pdf, 584 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

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

AD5222 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
AD5222BRU100-REEL7 Status: Production 14 ld TSSOP 14 Ind Reel, 1000 - - N  Material Info PCN Purchase
AD5222BRU1M-REEL7 Status: Production 14 ld TSSOP 14 Ind Reel, 1000 - - N  Material Info PCN Purchase
AD5222BRU50-REEL7 Status: Production 14 ld TSSOP 14 Ind Reel, 1000 - - N  Material Info PCN Purchase
AD5222BRUZ10 Status: Production 14 ld TSSOP 14 Ind Tube, 96 $0.89 $0.80 Y  Material Info PCN Purchase Sample
AD5222BRUZ10-REEL7 Status: Production 14 ld TSSOP 14 Ind Reel, 1000 - $0.80 Y  Material Info PCN Purchase
AD5222BRUZ1M Status: Production 14 ld TSSOP 14 Ind Tube, 96 $0.89 $0.80 Y  Material Info PCN Purchase Sample
AD5222BRZ10 Status: Production 14 ld SOIC 14 Ind Tube, 56 $0.89 $0.80 Y  Material Info PCN Purchase Sample
AD5222BRZ10-REEL7 Status: Production 14 ld SOIC 14 Ind Reel, 1000 - $0.80 Y  Material Info PCN Purchase
AD5222BRZ1M Status: Production 14 ld SOIC 14 Ind Tube, 56 $0.89 $0.80 Y  Material Info PCN Purchase Sample
AD5222BRZ50 Status: Production 14 ld SOIC 14 Ind Tube, 56 $0.89 $0.80 Y  Material Info PCN Purchase Sample
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.


沪ICP备09046653号
content here.
content here.

Review this Product

Close