概览

优势和特点

  • 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

产品详情

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.

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