GENERAL DESCRIPTION

The AD8232 is an integrated signal conditioning block for ECG and other biopotential measurement applications. It is designed to extract, amplify, and filter small biopotential signals in the presence of noisy conditions, such as those created by motion or remote electrode placement. This design allows for an ultralow power analog-to-digital converter (ADC) or an embedded microcontroller to acquire the output signal easily.

FEATURES

Fully integrated single-lead ECG front end

Low supply current: 170 µA (typical)

Common-mode rejection ratio: 80 dB (dc to 60 Hz)

Two or three electrode configurations

High signal gain (G = 100) with dc blocking capabilities

2-pole adjustable high-pass filter

Accepts up to ±300 mV of half cell potential

Fast restore feature improves filter settling

Uncommitted op amp

3-pole adjustable low-pass filter with adjustable gain

Leads off detection: ac or dc options

Integrated right leg drive (RLD) amplifier

Single-supply operation: 2.0 V to 3.5 V

Integrated reference buffer generates virtual ground

Rail-to-rail output

Internal RFI filter

8 kV HBM ESD rating

Shutdown pin

20-lead 4 mm × 4 mm LFCSP package

APPLICATIONS

Fitness and activity heart rate monitors

Portable ECG

Remote health monitors

Gaming peripherals

Biopotential signal acquisition