AFE for medical wearables is fully integrated, single lead ECG

Mouser now stocks the AD8233 analog front end (AFE) for heart monitor devices from Analog Devices. The AD8233 AFE is a fully integrated, single-lead electrocardiogram (ECG) front end designed in a compact, easy-to-use component. The low-power biopotential AFE enables smaller, lighter, and less obtrusive cardiac monitoring devices with longer battery life. The highly integrated AD8233 AFE eliminates unnecessary costs and extra design time, helping developers get products to market more quickly. The analog front end is an integrated signal conditioning block 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 ultra-low-power ADC or an embedded microcontroller to easily acquire the output signal. The device’s tiny, 2mm × 1.7mm footprint enables designers to create wearable health devices that are smaller, lighter, and easier to wear. Along with its small size, the single-supply (1.7V to 3.5V) device features extremely low quiescent current of 50µA (typical), resulting in greatly extended battery life that helps support continuous monitoring without the interruption of a recharge or battery replacement. For ease-of-use and flexibility, the device includes an integrated right leg drive amplifier with shutdown plus an uncommitted op amp. The device also provides a two-pole adjustable high-pass filter, a three-pole adjustable low-pass filter with adjustable gain, and a RFI filter to allow for consistent, confident operation in an inherently harsh electrical environment under a range of use cases. The device is supported by the AD8233CB-EBZ evaluation board, a ready-to-use AFE tool with the necessary inputs, outputs, supplies, and leads routed to test pins to simplify connectivity.