AD8232 Datasheet | Analog Devices

Data Sheet Single-Lead, Heart Rate Monitor Front End AD8232 Features Fully integrated single-lead ECG front end Low supply current: 170 µA (typical) mon-mode rejection ratio: 80 d B (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 m V of half cell potential Fast restore feature improves filter settling Unmitted 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 k V HBM ESD rating Shutdown pin 20-lead, 4 mm × 4 mm LFCSP and LFCSP_SS package Qualified for automotive applications APPLICATIONS Fitness and activity heart rate monitors Portable ECG Remote health monitors Gaming peripherals Biopotential signal acquisition 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. The AD8232 can implement a two-pole high-pass filter for eliminating motion artifacts and the electrode half-cell potential. This filter is tightly coupled with the instrumentation architecture of the amplifier to allow both large gain and high-pass filtering in a single stage, thereby saving space and cost. An unmitted operational amplifier enables the AD8232 to create a three-pole low-pass filter to remove additional noise. The user can select the frequency cutoff of all filters to suit different types of applications. FUNCTIONAL BLOCK DIAGRAM HPSENSE...