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This version (09 Aug 2021 13:43) is a draft.
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The Previously approved version (11 Apr 2019 15:44) is available.Diff

AD5940 Bio-Electric Shield User Guide

Introduction

The EVAL-AD5940BIOZ shield was designed specifically for carrying out bio-electric measurements. These include:

  • Electrodermal Activity (EDA)
  • Body Impedance Analysis (4-wire) (BIA)
  • Electrocardiogram (ECG)
  • Body Impedance Analysis (2-wire) (BIOZ-2Wire)

The platform is an Arduino UNO form factorbase board. This section describes the key features of the board and how to set it up to take measurements.

Connectors and Jumpers

All the connectors and their default configurations are described in the table below.

Connector Jmpr Position. Description
JP1 (DVDD) A DVDD powered from 3.3V on Arduino Header (Default)
B DVDD powered from LDO
C DVDD powered from external source connected to P11
JP2 (AVDD) A AVDD powered from 3.3V on Arduino Header (Default)
B AVDD powered from LDO
C AVDD powered from external source connected to P8
JP3 (Reset) A Reset pin connected to ARST Button (Default)
B Reset pin connected to Arduino Header Reset pin
C Reset pin connected to Arduino header P1.3 (Default)
P9 (LDO Enable) 1-2 LDO Enabled
2-3 LDO Disabled (Default)
P15 (LDO Aux Enable) 1-2 LDO Enabled
2-3 LDO Disabled (Default)
JP5 (Default DNI) A Pull up resistor (R25) connected to electrode bias
B Pull down resistor (R25)connected electrode bias
JP6 (Default DNI) A Pull up resistor (R42) connected to electrode bias
B Pull down resistor (R42)connected electrode bias
JP7 (Bias Select) 3-1 Electrode bias connected to REFOUTS
3-4 Electrode bias connected RLD
3-5 Electrode bias connected to VDD
JP8 A Connected. EEPROM write protect
P16 1-2 Pull up resistor R46 for ECG_P to electrode bias (Default)
2-3 Pull down resistor R46 for ECG_P to GND
P17 1-2 Pull up resistor R23 for ECG_P to electrode bias (Defaut)
2-3 Pull down resistor R23 for ECG_P to GND

USB Connector

The Micro USB connector, P6, on the EVAL-AD5940BIOZ board serves 2 functions.

  • The provided ECG cables can be connected to a human body simulator which can be used to verify ECG, body composition etc. Note: The EVAL-AD5940BIOZ must never be connected to the human body while the board is connected to a PC or Laptop
  • The provided AD5940 Z Test board can also be connected to the Micro USB connecter. This board contains a number of banks of resistors and capacitors which can be used to model Body Impedance, Skin Impedance, Electrode impedances and Contact impedance. These resistor values are configured with the various switches.

Note, P6 USB connector must only be used with the supplied AD5940 Z Test board or the provided ECG Cables. No other cable should ever be connected.

ECG Cables: Red = F+ Black = F- Green = S+ Blue = S-

Schematics, PCB Layout, Bill of Materials

resources/eval/user-guides/eval-ad5940/hardware/eval-ad5940bioz.txt · Last modified: 09 Aug 2021 13:43 by Akila M