AD8233ACBZ-R7

The AD8233ACBZ-R7 from Analog Devices is a fully integrated, single-lead ECG front end designed for extracting, amplifying, and filtering small biopotential signals. It is ideal for applications in noisy conditions such as those created by motion or remote electrode placement.

Key features include a low quiescent supply current of 50 µA typical, a common-mode rejection ratio of 80 dB (dc to 60 Hz), and high signal gain (G = 100) with dc blocking capabilities. It incorporates a 2-pole adjustable high-pass filter for motion artifact removal and a 3-pole adjustable low-pass filter using an uncommitted op-amp to further reduce noise. The device supports single-supply operation from 1.7 V to 3.5 V and includes an internal RFI filter and an 8 kV HBM ESD rating.

This AFE is housed in a compact 2 mm × 1.7 mm WLCSP package, making it suitable for space-constrained wearable products. Applications include fitness and activity heart rate monitors, portable ECG devices, and other biopotential signal acquisition systems like EMG or EEG.

The AD8233ACBZ-R7 facilitates easy acquisition of output signals by an ultralow power analog-to-digital converter or an embedded microcontroller. Its design allows for user-selectable filter cutoff frequencies to suit various application requirements.