1. Products
  2. A/D Converters (ADC)
  3. Precision A/D Converters
  4. Simultaneous Sampling A/D Converters
  5. AD7381-4


Features and Benefits

  • 14-bit ADC family
  • Quad simultaneous sampling
  • Fully differential analog inputs
  • Wide common-mode range
  • High throughput rate: 4 MSPS
  • Buffered 2.5 V internal voltage reference (10 ppm/°C maximum)
  • On-chip oversampling function
  • INL (maximum): 1.5 LSB
  • SNR (typical)
    • 85.3 dB at VREF = 3.3 V
    • 90.6 dB at OSR = 8× rolling average oversampling, RES = 1
  • 2-bit resolution boost
  • Out of range indicator (ALERT)
  • High-speed serial interface
  • −40°C to +125°C operation
  • 4 mm × 4 mm, 24-lead LFCSP

Product Details

The AD7381-4 a 16-bit, quad, simultaneous sampling, high speed, successive approximation register (SAR), analog-to-digital converter (ADC) that operates from a 3.0 V to 3.6 V power supply and features throughput rates up to 4 MSPS. The analog input type is differential, accepts a wide common-mode input voltage, and the analog inputs are sampled and converted on the falling edge of CS.

The AD7381-4 has on-chip oversampling blocks to improve dynamic range and reduce noise at lower bandwidths. The oversampling can boost up to two bits of added resolution. A buffered internal 2.5 V reference (10 ppm/°C) is included. Alternatively, an external reference up to 3.3 V can be used.
The conversion process and data acquisition use standard control inputs allowing for easy interfacing to microprocessors or digital signal processors (DSPs). The conversion result can clock out simultaneously via 4-wire mode for faster throughput or via 1-wire serial mode when slower throughput is allowed. The device is compatible with 1.8 V, 2.5 V, and 3.3 V interfaces, using the separate logic supply.


  • Motor control position feedback
  • Motor control current sense
  • Data acquisition systems
  • Erbium doped fiber amplifier (EDFA) applications
  • In phase and quadrature demodulation


  • Quad simultaneous sampling and conversion.
  • Pin-compatible product family.
  • High throughput rate, 4 MSPS at 14-bit.
  • Space-saving, 4 mm × 4 mm LFCSP.
  • Integrated oversampling block to increase dynamic range, reduce noise and reduce SCLK speed requirements.
  • Differential analog inputs with wide common-mode range.
  • Small sampling capacitor reduces amplifier drive burden.

Product Lifecycle icon-recommended Recommended for New Designs

This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.

Evaluation Kits (1)

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
AD7381-4BCPZ Material Declaration Reliability Data 24-Lead LFCSP (4mm x 5mm w/ EP)
AD7381-4BCPZ-RL Material Declaration Reliability Data 24-Lead LFCSP (4mm x 5mm w/ EP)
AD7381-4BCPZ-RL7 Material Declaration Reliability Data 24-Lead LFCSP (4mm x 5mm w/ EP)
Wafer Fabrication Data

Sample & Buy

Ordering FAQs

See our Ordering FAQs for answers to questions about online orders, payment options and more.


Buy Now Pricing

(**) Displayed Buy Now Price and Price Range is based on small quantity orders.


List Pricing

(*)The 1Ku 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. authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.


Lead Times

Please see the latest communication from our CCO regarding lead times.



Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.

Price Table Help


Evaluation Boards

Pricing displayed is based on 1-piece.

Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.

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.