AD7381
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AD7381

4MSPS Dual Simultaneous Sampling, 14-BIT SAR ADC, Differential Input

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Part Details
Part Models 3
1ku List Price Starting From $15.96
Features
  • 16-bit/14-bit ADC family
  • Dual simultaneous sampling
  • Fully differential analog inputs
  • 4 MSPS throughput conversion rate
  • SNR (typical)
    • 92.5 dB, VREF = 3.3 V external at AD7380 (16-bit)
    • 85.4 dB, VREF = 3.3 V external at AD7381 (14-bit)
    • 101 dB with ×16 OSR
  • On-chip oversampling function
  • Resolution boost function
  • INL (maximum)
    • 2.0 LSBs at 16-bit
    • 1.0 LSB at 14-bit
  • 2.5 V internal reference
  • High speed serial interface
  • −40°C to +125°C operation
  • 16-lead LFCSP, 3 mm × 3 mm
  • Wide common-mode range
  • Alert function
Additional Details
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The AD7380/AD7381 are a 16-bit and 14-bit pin-compatible family of dual simultaneous sampling, high speed, low power, successive approximation register (SAR) analog-to-digital converters (ADCs) that operate from a 3.0 V to 3.6 V power supply and feature throughput rates up to 4 MSPS. The analog input type is differential, accepts a wide common-mode input voltage, and is sampled and converted on the falling edge of CS.

An integrated on-chip oversampling block improves dynamic range and reduces noise at lower bandwidths. A buffered internal 2.5 V reference 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 simple interfacing to microprocessors or digital signal processors (DSPs). The device is compatible with 1.8 V, 2.5 V, and 3.3 V interfaces using the separate logic supply.

The AD7380/AD7381 are available in a 16-lead lead frame chip scale package (LFCSP) with operation specified from −40°C to +125°C.

Product highlights

  1. Dual simultaneous sampling and conversion with two complete ADC functions.
  2. Pin-compatible product family.
  3. High 4 MSPS throughput rate.
  4. Space saving 3 mm × 3 mm LFCSP.
  5. An integrated oversampling block to increase dynamic range, reduce noise, and reduce SCLK speed requirements.
  6. Differential analog inputs with wide common-mode range.
  7. Small sampling capacitor reduces amplifier drive burden.

Applications

  • Motor control position feedback
  • Motor control current sense
  • Sonar
  • Power quality
  • Data acquisition systems
  • Erbium doped fiber amplifier (EDFA) applications
  • I and Q demodulation
Part Models 3
1ku List Price Starting From $15.96

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
AD7381BCPZ-R2
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  • HTML
AD7381BCPZ-RL
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AD7381BCPZ-RL7
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Product Lifecycle

PCN

Jul 8, 2019

- 19_0126

AD7380/AD7381 Data Sheet Specification Change

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Part Models

Product Lifecycle

PCN

Jul 8, 2019

- 19_0126

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AD7380/AD7381 Data Sheet Specification Change

Software & Part Ecosystem

Software & Part Ecosystem

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Evaluation Kit

Evaluation Kits 1

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EVAL-AD738xFMCZ

Evaluation board for the AD7380/AD7381 Dual Simultaneous Sampling 16/14-Bit SAR ADC.

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EVAL-AD738xFMCZ

Evaluation board for the AD7380/AD7381 Dual Simultaneous Sampling 16/14-Bit SAR ADC.

Evaluation board for the AD7380/AD7381 Dual Simultaneous Sampling 16/14-Bit SAR ADC.

Features and Benefits

  • Full featured evaluation board multichannel, simultaneous sampling ADC
  • On-board reference, reference buffer, and ADC driver
  • On-board power supplies
  • Board-compatible, high speed system demonstration platform (SDP-H1) controller
  • PC software for control and data analysis

Product Detail

The EVAL-AD7380FMCZ and EVAL-AD7381FMCZ are full featured evaluation boards that evaluate all features of the AD7380 and AD7381 analog-to-digital converters (ADCs). The evaluation boards can be controlled by the EVAL-SDP-CH1Z via the 160-way system demonstration platform (SDP) connector, J4. The EVAL-SDP-CH1Z board controls the evaluation boards through the USB port of a PC using the Analysis, Control, Evaluation (ACE) software, which is available for download from the ACE software page.

Complete specifications for the AD7380 and AD7381 are provided in the AD7380/AD7381 data sheet. Consult these specifications in conjunction with the user guide when using the evaluation boards. Full details on the EVAL-SDP-CH1Z are available on the SDP-H1 product page. The comprehensive ACE user guide is available on the ACE software page.

The EVAL-AD7380FMCZ can be used to evaluate the AD4680 and AD4681. The AD4680 and AD4681 have slower throughput rates (at 1 MSPS and 500 kSPS, respectively) than the AD7380. The throughput can be adjusted to fit for AD4680 and AD4681 by adjusting the clock speed and the sampling frequency.

Figure 1 in the user guide shows the typical setup of the EVAL-AD7380FMCZ board. The setup for the EVAL-AD7381FMCZ board is the same as the EVAL-AD7380FMCZ setup.

Tools & Simulations

Tools & Simulations 3

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