Overview

Features and Benefits

  • AFE for ECG measurement
    • 5 ECG acquisition channels and 1 driven reference
    • Flexible front-end arrangement allows right arm electrode or WCT referenced
    • Dedicated per channel Σ-Δ ADC
    • 50 mV typical calibration signal for gain correction
  • Digital 50 Hz or 60 Hz mains power line filtering
  • Flexible pacemaker detection capability
    • Digital detection algorithm on selectable 3 of 5 ECG channels
      • Programmable threshold levels
      • Dedicated high sample rate SAR ADCs
  • Lead-off or lead fail detection
    • DC lead-off detection on ECG and RLD_OUT
      • Programmable polarity, current, and threshold levels
    • AC lead quality measurement
      • Programmable polarity current
  • Reference electrode drive
    • Flexible redirection to other electrodes if RLD lead failure
  • Respiration measurement using impedance pneumography
  • High precision voltage references
  • Shield drive amplifier
  • Parallel ICs for larger lead count configurations
  • Communication
    • SPI
    • 8 user programmable GPIOs
  • Power
    • Low power architecture
      • Single channel ECG power: 3.04 mW
      • 3 channel ECG power: 4.95 mW
      • 5 channel ECG power: 7.64 mW
    • Operates from 2 or 3 voltage rails: 5 V, 1.8 V, or 1.2 V
    • POR
  • Packages and temperature range
    • Operating temperature range: −10°C to +85°C
    • Package: 65-ball, 5.6 mm × 6.2 mm WLCSP
  • Supports medical standards: IEC 60601-2-25 Ed. 2.0 2011, IEC 60601-2-27 Ed. 3.0 2011, and IEC 60601-2-47 Ed. 2.0 2012

Product Details

The ADAS1021 is a highly integrated, analog front end (AFE) designed for measurement of patient biopotential information. The primary measurement performed is electrocardiogram (ECG) activity, where the ADAS1021 employs dedicated Σ-Δ analog-to-digital converters (ADCs) per channel to acquire and digitize on a lead basis. The signal acquisition is architected to support low noise, diagnostic level measurement in the presence of a variety of interferers.

The ADAS1021 also includes three dedicated successive approximation register (SAR) ADCs to digitize the high frequency pacemaker content that is analyzed by the on-chip pacemaker detection algorithm.

A dedicated and flexible impedance measurement block captures impedance variation during patient respiration and is available on multiple leads.

The ADAS1021 has a number of complementary features supporting ECG measurement: driven reference for common-mode rejection and lead-off detection that identifies if an electrode connection is degrading or has fallen off. The product also includes a shield drive amplifier to bias the shield of the cable.

APPLICATIONS

  • Portable and line powered ECG monitor and diagnostic measurement
  • Battery powered ECG equipment
For further information and full product specifications, send your project details, company information and contact by e-mail to adas1021@analog.com. Additional support is available from your Analog Devices local sales.

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.

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.

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The USA 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. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.


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