HM301D

概要

The HM301D is a highly integrated diagnostic-quality biopotential acquisition system with 3 differential channels. Multi master/slave configuration supports up to 16 channels of simultaneous sampling (12 biopotential acquisitions and 4 bio-impedance channels). A fully integrated high-pass filter removes the half-cell DC value to enable the channels to work with the AC component only. Each channel provides high resolution and low noise conversion of biopotential signals up to 10 kHz.

The input connection circuit matrix guarantees maximum flexibility in terms of electrode cables and connectors.

The HM301D includes a dedicated impedance measurement channel that can be used to measure both body impedance average value and variation due to respiration. This channel delivers both the real and the imaginary parts of the body and the breathing impedances. The WCT circuit and driver block implements the driving functions (right leg driver and shield driver) and the Wilson common terminal commonly used in ECG systems.

The electrode-to-skin contact is checked by injecting an AC or DC current. A digital filtering and preprocessing (DFP) block implements configurable band-pass filters, IQ impedance demodulation and enables specific algorithm implementation for lead-off check and pacemaker detection.

The SPI interface allows the exchange of data with both the microcontroller and other HM301D devices in case of chain connection. Full configurability and low power design techniques make it ideal for many applications, including battery-powered devices. High quality recordings are obtained with a small, power-saving system. The 3-channel version is available in a 6 x 6 mm 40-lead LGA.