Analog Devices Inc. AD7380/AD7381 Dual Sampling 16/14Bit SAR ADCs

Analog Devices AD7380 and AD7381 16-Bit/14-Bit SAR Analog-to-Digital Converters (ADCs) operate from a 3.0V to 3.6V power supply and feature throughput rates up to 4MSPS. The AD7380 and AD7381 feature a differential analog input type that accepts a wide common-mode input voltage. It's sampled and converted on the falling edge of CS. Integrated on-chip oversampling blocks improve dynamic range and reduce noise at lower bandwidths. A buffered internal 2.5V reference is included. Alternatively, an external reference up to 3.3V can be used. The conversion process and data acquisition use standard control inputs allowing easy interfacing with microprocessors or digital signal processors (DSPs). The device is compatible with 1.8V, 2.5V, and 3.3V interfaces, using a separate logic supply.


  • 16-bit/14-bit ADC family
  • Dual simultaneous sampling
  • Fully differential analog inputs
  • 4MSPS throughput conversion rate
  • SNR (typical)
    • 92.5dB, VREF = 3.3V external at AD7380 (16-bit)
    • 85.4dB, VREF = 3.3V external at AD7381 (14-bit)
  • On-chip oversampling function
  • Resolution boost function
  • SNR 102.8dB (typical) with × 32 OSR
  • INL (maximum)
    • 2.0 LSBs at 16-bit
    • 1.0 LSB at 14-bit
  • 2.5V internal reference at 10 ppm/°C
  • High-speed serial interface
  • -40°C to +125°C operation
  • 16-lead LFCSP, 3mm × 3mm
  • Wide common-mode range
  • Alert function


  • Motor control position feedback
  • Motor control current sense
  • Sonar
  • Power quality
  • Data acquisition systems
  • EDFA applications
  • I and Q demodulation


Block Diagram

Block Diagram - Analog Devices Inc. AD7380/AD7381 Dual Sampling 16/14Bit SAR ADCs
Published: 2019-02-14 | Updated: 2023-08-21