ADAS1000-3BSTZ

Overview

The ADAS1000-3BSTZ is a low-power, three-electrode electrocardiogram (ECG) analog front end manufactured by Analog Devices Inc. It features three acquisition channels and one driven lead, designed for biopotential signal digitization. The device supports AC and DC lead-off detection, internal pace detection algorithms on three leads, and thoracic impedance measurement. It operates within a temperature range of −40°C to +85°C and offers scalable noise versus power control with power-down modes. Power consumption is specified at 11 mW for one lead and 15 mW for three leads in high-performance mode. The component is housed in a 64-lead LQFP package.

Feature Summary

• Three ECG acquisition channels with one driven lead and selectable reference drive
• Internal pace detection algorithm operating on three leads with support for user-defined pace algorithms
• AC and DC lead-off detection capabilities with programmable current sources
• Thoracic impedance measurement via internal or external paths

Applications

• Bedside patient monitoring systems
• Portable telemetry and Holter monitors
• Automated external defibrillators (AED)
• Cardiac defibrillators and ambulatory monitors

Procurement Notes

Verify the specific ordering suffix BSTZ corresponds to the 64-lead LQFP package variant when sourcing. Confirm that the procurement channel provides the official datasheet Rev. C documentation. Ensure compatibility with system voltage requirements, specifically AVDD at 3.3 V and IOVDD between 1.65 V and 3.6 V. Check for RoHS compliance status as indicated in the manufacturer's latest release notes.

Selection Notes

Select the ADAS1000-3BSTZ for applications requiring exactly three ECG channels without respiration or pace detection hardware features, which are reserved for the ADAS1000-4 model. This part is suitable for primary or secondary device roles in multi-chip configurations. Consider the 64-lead LQFP package if board space allows for a 10 mm × 10 mm body size, offering easier manual assembly compared to the 56-lead LFCSP option.

Part Context

The ADAS1000-3 is part of the ADAS1000 series, which includes models with varying channel counts and feature sets such as the ADAS1000, ADAS1000-1, ADAS1000-2, and ADAS1000-4. While the ADAS1000-4 includes respiration and pace detection circuits, the ADAS1000-3 focuses solely on ECG acquisition and auxiliary functions like lead-off detection. These devices are designed to simplify data acquisition for battery-powered portable and high-end diagnostic medical equipment.

Replacement Considerations

The ADAS1000-4 serves as a functional upgrade replacement if respiration and pace detection features are required. For five-channel configurations, the ADAS1000 or ADAS1000-1 may be used, potentially requiring additional companion chips like the ADAS1000-2 for expanded electrode counts.