ADAS1021
RECOMMENDED FOR NEW DESIGNS5-Channel ECG AFE with Respiration, Pacemaker Detection and Lead-Off/Quality Detection
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Part Details
- 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
- Digital detection algorithm on selectable 3 of 5 ECG channels
- 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
- DC lead-off detection on ECG and RLD_OUT
- Reference electrode drive
- Flexible redirection to other electrodes if RLD lead failure
- Respiration measurement using impedance pneumography
- Shield drive amplifier
- Parallel ICs for larger lead count configurations
- SPI communication and 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
- Designed for use with ADP5320 PMU
- Operates from 2 or 3 voltage rails: 5 V, 1.8 V, or 1.2 V
- Low power architecture
- 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
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
Documentation
Data Sheet 1
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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.
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 Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| ADAS1021KCBZ-RL | 65-ball WLCSP (5.56 mm x6.16 mm x 0.595 mm) |
This is the most up-to-date revision of the Data Sheet.