Application Notes (8)
- AN-1209: Logarithmic Audio Volume Control with Glitch Reduction Using the AD5292 Digital Potentiometer (pdf, 111 kB)
- AN-1208: Programmable Bidirectional Current Source Using the AD5292 Digital Potentiometer and the ADA4091-4 Op Amp (pdf, 189 kB)
- AN-1207: Programmable High Voltage Source with Boosted Output Current Using the AD5292 Digital Potentiometer, OP184 Op Amp, and MOSFETs (pdf, 110 kB)
- AN-1206: Variable Gain Inverting Amplifier Using the AD5292 Digital Potentiometer and the OP184 Op Amp (pdf, 177 kB)
- AN-1205: 30 V Low Cost DAC Using the AD5292 Digital Potentiometer (pdf, 225 kB)
- AN-683: Strain Gage Measurement Using an AC Excitation (pdf, 122 kB)
- AN-671: Reducing RFI Rectification Errors in In-Amp Circuits (pdf, 208 kB)
- AN-282: Fundamentals of Sampled Data Systems (pdf, 2131 kB)
Circuit Note (3)
- CN-0067: Fully Isolated Input Module Based on the AD7793 24-Bit Σ-Δ ADC, the ADuM5401 Digital Isolator, and a High Performance In-Amp (pdf, 271 kB)
- CN-0112: Variable Gain Noninverting Amplifier Using the AD5292 Digital Potentiometer and the OP184 Op Amp (pdf, 119 kB)
- CN-0114: Low Cost, High Voltage, Programmable Gain Instrumentation Amplifier Using the AD5292 Digital Potentiometer and the AD8221 In-Amp (pdf, 155 kB)
Technical Articles (13)
-
Auto-Zero Amplifiers
(doc, 75 kB)
A wide variety of electronic applications, especially those involving very small input signals, require signal paths with very low offset voltage and offset voltage drift over time and temperature. - Biopotential Electrode Sensing in ECG, EMG, and EEG Monitors
- Biopotential Electrode Sensors in ECG/EEG/EMG Systems (pdf, 122 kB)
-
Eye Movement Controls Gaming Console
(EE Times, 11/4/2010) - High Performance Electrocardiogram (ECG) Signal Conditioning
-
High-performance Adder Uses Instrumentation Amplifiers
Make an adder circuit using instrumentation amplifiers to increase input impedance.
(EDN, 9/3/2009) -
Input Filter Prevents Instrumentation-amp RF-Rectification Errors
by Charles Kitchin, Lew Counts, and Moshe Gerstenhaber, Analog Devices, Inc. (EDN, 11/13/2003) - MS-2160: Mitigation Strategies for ECG Design Challenges (pdf, 205 kB)
- MS-2178: Discussion Between CareFusion and Analog Devices: Optimizing Performance and Lowering Power in an EEG Amplifer (pdf, 147 kB)
-
PLC Evaluation Board Simplifies Design of Industrial Process Control Systems
(Analog Dialogue, Vol. 43, April 2009) -
Simplifying Design of Industrial Process-Control Systems with PLC Evaluation Boards
PLC evaluation board applications for industrial process-control systems are diverse, ranging from simple traffic control to complex electrical power grids, from environmental control systems to oil-refinery process control.
(Industrial Control DesignLine, 8/24/09 - Part 1 and 9/3/09 - Part 1) -
Simplifying Design of Industrial Process-Control Systems with PLC Evaluation Boards (Part 1 of 2)
PLC evaluation board applications for industrial process-control systems are diverse, ranging from simple traffic control to complex electrical power grids, from environmental control systems to oil-refinery process control.
(Industrial Control DesignLine, 8/24/09) - The AD8221 - Setting a New Industry Standard for Instrumentation Amplifiers (pdf, 582 kB)
White Papers (1)
- Biopotential Electrode Sensors in ECG/EEG/EMG Systems (pdf, 122 kB)
Data Sheets (7)
- AD5291/AD5292: 256-/1024-Position, Digital Potentiometers with Maximum ±1% R-Tolerance Error and 20-TP Memory Data Sheet (Rev D, 09/2010) (pdf, 387 kB)
- AD5292-DSCC: Microcircuit, Digital, 1024-Position, Digital Potentiometer with Maximum ±1% R-Tolerance Error and 20-TP Memory, Monolithic Silicon Military Data Sheet (Rev A, 04/2009)
- AD5292-EP: 1024-Position, Digital Potentiometer with Maximum ±1% R-Tolerance Error and 20-TP Memory Data Sheet (Rev 0, 09/2011) (pdf, 497 kB)
- AD5293: Single-Channel, 1024-Position, 1% R-Tolerance Digital Potentiometer Data Sheet (Rev D, 03/2011) (pdf, 353 kB)
- AD8220: JFET Input Instrumentation Amplifier with Rail-to-Rail Output in MSOP Package Data Sheet (Rev B, 05/2010) (pdf, 803 kB)
- AD8221: Precision Instrumentation Amplifier Data Sheet (Rev C, 03/2011) (pdf, 701 kB)
- AD8227: Wide Supply Range, Rail-to-Rail Output Instrumentation Amplifier Data Sheet (Rev 0, 05/2009) (pdf, 650 kB)
Design Handbooks (2)
Device Drivers (1)
Documentation (4)
FAQs/RAQs (80)
- 6-Bit Controller
- Adjustable Current Source for Driving Multiple LEDs
- Adjustable Current Source for Driving Single LED
- Adjustable Voltage Source for Driving LED
- After the specified EEMEM data retention timeout period, can the power be turned off and back on so that the part is considered "refreshed"?
- 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?
- Are all digital potentiometers limited to |5V|?
- Are PB-free digital potentiometers available?
- Are there any evaluation boards for the digital potentiometers?
- Audio Amplifier Volume Control
- Audio Volume Control
- Automatic LED Brightness Control
- Bipolar DAC with EEPROM
- Bipolar Programmable Gain Amplifier
- Can a digipot be used to construct a programmable high current source?
- Can a digitally controlled variable resistor withstand greater than 20mA?
- Can digital potentiometers do log taper adjustment?
- Can I achieve a 15V signal swing when using a 5V digital potentiometer?
- Can I adjust the digital potentiometer for frequencies around 1MHz to 10MHz for adjusting the gain of a video signal?
- 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.
- Can I program two channels of a multi-channel digital potentiometer at the same time?
- Can I read back the contents of the two RDAC registers of AD5242 or AD5282 (dual I2C compatible digital potentiometer)?
- Can I read back the wiper setting of the digital potentiometers?
- Can I use the new PB-free DigiPOTs in my traditional solder based PCB assembly process?
- Digital Feedthrough
- Do digital potentiometers handle bipolar and AC operations?
- Do you provide any software to control the digital potentiometers?
- Does the memory allow the device to return to the last stored value without an update from a micro?
- For a digital potentiometer that requires 12-bit word length, how can I control with only 8-bit word length from my micro?
- For a digital potentiometer that requires 6-bit word length, what happens if I have 8-bit word length from my PC?
- For digital potentiometers that do not have nonvolatile memory, what is the state during power up?
- 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?
- High Power RGB LEDs Driver
- High Voltage DAC
- 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?
- How do I tell the end-to-end RAB resistance value?
- How good is the resistance matching between Ch1 and Ch2 in the dual digital potentiometer?
- How is the resistance matching device to device?
- How is the THD performance of digital potentiometer?
- How many write cycles can the EEMEM go through before it fails?
- I would like to know how the digital potentiometer is built. How ideal are the wiper switches?
- I'm trying to use a potentiometer (pot) in the feedback loop of an op amp circuit, but the adjustment is too sensitive. Do you have any suggestions on how to improve the performance of this circuit?
- I'm unsure about how to use pin 13 write protect (/WP), pin 14 preset (/PR), and pin 16 ready (RDY)?
- If I program Ch 1 from zero to full scale, will I expect Ch 2 to be disturbed?
- 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?
- If I use the digital potentiometer in audio volume control, will I experience zipper noise?
- Is digital potentiometer a real replacement for mechanical potentiometer or are there restrictions regarding voltage potentials?
- Is there a dependency between the logic level and power consumption?
- Is there a digital potentiometer controlled by a parallel input?
- Is there a particularly low-power digital potentiometer?
- Is there a power up sequence I should follow?
- 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?
- Laser Bias and Modulation Current Biasing
- LCD Panel VCOM Adjustment
- Level Shifting Digital Inputs from 3.3V to 5V or Vice Versa
- Level Shifting Digital Signals from 0V to +5V to -5V to 0V
- Manual Push Button LED Driver
- Manual Rotary Control
- Multiple I2C Slave Devices Addressing
- Programmable 5-30V Power Supply
- Programmable Bidirectional Current Source
- Programmable Current-Sensing Amplifier
- Programmable LDO with Precision
- Programmable Low Pass Filter
- Programmable Oscillator
- Programmable State-Variable Filter
- Pseudo Memory Retention
- 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.
- Resolution Enhancement
- Voltage-to-Current Conversion
- What are the common failure modes of digital potentiometers?
- What is the ESD rating of digital potentiometers?
- What is the maximum current I can force into the digital potentiometer?
- What is the maximum frequency that can be applied to the digital potentiometer CLK input?
- What is the resistance tolerance of the digital potentiometers?
- What is the tempco of the digital potentiometer?
- What should I watch out for when I replace mechanical potentiometers with digital potentiometers?
- Why are some digital potentiometers' maximum operating temperature only 85°C instead of the standard 125°C?
- Why Should I replace mechanical potentiometers with digiPOT?
- Will the data in the EEMEM need to be refreshed after 15 yrs when it is operated at 55°C?
IBIS Models (1)
Overview (5)
- Choosing the Correct digiPOT for Your Application (pdf, 431 kB)
- DigiPot Circuits from the Lab
- Leading Inside Advertorials: Applying Instrumentation Amplifiers Effectively–The Importance of an Input Ground Return (pdf, 121 kB)
-
Medical Applications
- Booklet (pdf, 970 kB)
- Technical Presentation (ppt)
- Optimum process control means efficiency, reliability, and Analog ICs.
Product Reviews (2)
-
analogZONE Reviews the AD8221
(February 10, 2003) -
Dual In-Amp And Signal Isolators Sweat The Small Stuff
(ED, 4/13/2006)
Software and Tools (1)
SPICE Models (3)
- AD8220 SPICE Macro-Model
- AD8221 SPICE Macro-Model
- AD8227 SPICE Macro Model
Tutorials (7)
- MT-031: Grounding Data Converters and Solving the Mystery of (pdf, 144 kB)
- MT-032: Ideal Voltage Feedback (VFB) Op Amp (pdf, 65 kB)
- MT-061: Instrumentation Amplifier (In-Amp) Basics (pdf, 125 kB)
- MT-087: Voltage References (pdf, 229 kB)
- MT-091: Digital Potentiometers (pdf, 235 kB)
- MT-095: EMI, RFI, and Shielding Concepts (pdf, 145 kB)
- MT-101: Decoupling Techniques (pdf, 954 kB)
User Guides (2)
- UG-181: PLC Demo System User Guide (pdf, 541 kB)
- UG-261: Evaluation Boards for the AD62x, AD822x and AD842x Series (pdf, 604 kB)
Webcasts (1)
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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.
Analog Dialogue (1)
-
PLC Evaluation Board Simplifies Design of Industrial Process Control Systems
(Analog Dialogue, Vol. 43, April 2009)
