1. Products
  2. A/D Converters (ADC)
  3. Precision A/D Converters
  4. Single Channel A/D Converters
  5. AD4000


Features and Benefits

  • Easy Drive expands signal chain flexibility
    • High-Z mode significantly reduces signal chain settling requirements
    • Fast conversion phase extends the ADC acquisition time
    • Input overvoltage protection clamp sinks up to 50 mA
  • High performance
    • First conversion accurate, no latency or pipeline delay
    • Guaranteed 16-bit, no missing codes
    • Throughput: 2 MSPS/1 MSPS/500 kSPS options
    • INL: ±1.0 LSB maximum
    • SNR: 93 dB at fIN = 1 kHz, VREF = 5 V
    • THD: −115 dB at fIN = 1 kHz; −95 dB at fIN = 100 kHz
    • Pseudo differential input range
    • Flexible external reference voltage range (2.4 V to 5.1 V)
  • Low power
    • Single 1.8 V supply operation with 1.71 V to 5.5 V logic interface
    • 2.5 mW at 500 kSPS (VDD only)
    • 70 μW at 10 kSPS, 14 mW typical at 2 MSPS (total power)
  • SPI-/QSPI-/MICROWIRE-/DSP-compatible serial interface
  • 10-lead packages: 3 mm × 3 mm LFCSP, 3 mm × 4.90 mm MSOP
  • Guaranteed operation: −40°C to +125°C

Product Details

The AD4000/AD4004/AD4008 are high accuracy, high speed, low power, 16-bit, precision successive approximation register (SAR) analog-to-digital converters (ADCs). These ADCs incorporate Easy Drive features, such as high-Z mode and an extended acquisition phase, which provide signal chain architectural flexibility by expanding the range of companion circuitry that can be paired with these ADCs.

Operating from a single power supply, VDD, these ADCs allow the reference voltage, VREF, to be applied externally and set independently of the supply voltage. With fast device throughput up to 2 MSPS, the AD4000/AD4004/AD4008 can accurately capture high-frequency signals and implement oversampling techniques to alleviate the challenges associated with antialias filter designs. Additionally, the power consumption of these ADCs scales linearly with throughput.

The AD4000/AD4004/AD4008 eliminate the need for a negative supply to the ADC driver amplifier by employing input span compression, while preserving access to the full ADC code range. Furthermore, the input overvoltage clamp protects the ADC inputs against overvoltage events, minimizing disturbances on the reference pin and eliminating the need for external protection diodes.

By reducing the serial peripheral interface (SPI) clock rate requirements, the AD4000/AD4004/AD4008 reduce digital input and output power consumption, broaden digital host options, and simplify the task of sending data across digital isolation. The SPI-compatible serial user interface supports 1.8 V, 2.5 V, 3.3 V, and 5 V logic by using the separate VIO logic supply.


  • Automated test equipment
  • Machine automation
  • Medical equipment
  • Battery-powered equipment
  • Precision data acquisition systems
  • Instrumentation and control systems

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Evaluation Kits (1)

Tools & Simulations


LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

To launch ready-to-run LTspice demonstration circuits for this part:

Step 1: Download and install LTspice on your computer.

Step 2: Click on the link in the section below to download a demonstration circuit.

Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.


Models for the following parts are available in LTspice:


Precision ADC Driver Tool

The Precision ADC Driver Tool is a web application that simulates the performance of precision ADC and driver combinations. Potential issues with driver selection, kickback settling, and distortion are flagged, and design tradeoffs can be quickly evaluated. Simulations and calculations include system noise, distortion, and settling of the ADC input

Precision ADC Driver Tool

IBIS Models

AD4000 Series IBIS Models

Product Recommendations

AD4000 Circuits

  • Low Input Bias Current, Low Noise Applications
  • High Frequency, Low Noise, Low Distortion Applications
  • Precision, Lowest Power Applications

AD4000 Companion Parts

Recommended Driver Amplifiers

Recommended External Voltage References

Recommended Digital Isolators

  • For SPI Interface, low power, high-speed 3/3.5 kVrms isolation: ADUM141D, ADUM141E.

Recommended Low Dropout Regulators and Switchers

Recommended MEMS Accelerometers

  • For low noise, low drift, low power 3-axis accelerometer: ADXL354.

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.

Part Number Material Declaration Reliability Data Pin/Package Drawing CAD Symbols, Footprints & 3D Models
AD4000BCPZ-RL7 Material Declaration Reliability Data 10-Lead LFCSP (3mm x 3mm)
AD4000BRMZ Material Declaration Reliability Data 10-Lead MSOP
AD4000BRMZ-RL7 Material Declaration Reliability Data 10-Lead MSOP
Wafer Fabrication Data

Sample & Buy

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Buy Now Pricing

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Lead Times

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Evaluation Boards

Pricing displayed is based on 1-piece.

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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.