Bioimpedance (Bio-Z)
The MAXREFDES106# includes a high-performance BioZ data acquisition system, MAX86178. The
system can measure impedance across multiple application areas with a wide range of frequencies and
magnitudes.
See the MAX86178 data sheet for a more detailed description and available feature-set of the BioZ AFE.
Overview
The BioZ system primarily consists of a transmit (TX) channel, a receive (RX) channel, and an
input/output MUX. The BioZ system supports calibration using internal or external calibration resistors,
enabling 0.1 % accuracy in the I/Q channel. The flexible I/O MUX, lead-on and lead-off detection,
adjustable amplifier bias, and lead bias allow for flexible hardware designs capable of multiple
measurement types with low power consumption.
Associated Tabs
The tabs associated with BioZ measurement are the PLL, BioZ Drive, BioZ Receive, BioZ Mux, and
BioZ Calibration. See their associated sections for a more detailed description of each available
configuration option.
Minimum Settings
The following settings satisfy the minimum requirements for collecting a raw ECG measurement. The rest
of the settings can be configured further but can be left at their power-on defaults.
BioZ Drive: ‘I-Channel’ selected in ‘BioZ Enable’ (selecting this box on one of the tabs selects all).
BioZ Receive: ‘I-Channel’ selected.
BioZ MUX: Keep as default.
BioZ Calibration: Before any BioZ measurement, a BioZ Calibration is required. See the BioZ
Calibration section for details.
To Next Page
Loading...
Need help?
General