AD-IMP2501-SL

1 Hz to 1.5 MHz impedance analysis evaluation and technology solution.

Overview

The AD-IMP2501-SL is an impedance analyzer demonstrator and technology evaluation system comprised of both the AD-IMP2501DBZ-SL and the AD-IMP2501EBZ-SL boards.

The AD-IMP2501EBZ-SL is the carrier board that allows for simplified host PC communication interfacing, varying electrical load connections, and easier setup/debug.

The AD-IMP2501DBZ-SL is the electrical impedance spectroscopy module, capable of tetrapolar impedance measurements up to 250 impedance samples per second. It integrates AC waveform signal generation from 0V - 2.4V at 1Hz up to 1.5MHz, differential voltage measurement, current return measurement, and full impedance processing with an arm cortex M4 microprocessor. All in a 400mm square PCB.

https://media.githubusercontent.com/media/analogdevicesinc/documentation/main/docs/solutions/reference-designs/ad-imp2501-sl/images/eval-ad-imp2501-sl.png

Figure 1 AD-IMP2501-SL

Features

The AD-IMP2501DBZ-SL is a high-performance, impedance analyzer module.

  • Highly compact, 31.24mm x 12.83mm System-on-Module (SOM)

  • Impedance measurements from 0.1 Hz to 1.5 MHz

  • Current or Voltage drive application modes

  • 16-bit acquisition channels

  • Operates from a single 5V supply

  • UART interface (additional BLE 5.2, USB, and SPI hardware support capable)

  • Meets patient leakage requirements for IEC 60601-1*

  • 6 display mode formats in SI units

  • Command line, Graphical user interface, and Python API for easy system evaluation and data collection

*Current hardware implementation is dependent on voltage drive levels. The hardware can be modified to limit the current depending on application specifications and voltage drive needs

The AD-IMP2501EBZ-SL is an easy-to-use evaluation and development board that enables convenient access to the functionality of the AD-IMP2501DBZ-SL Impedance Analyzer Measurement Module.

  • USB-C connector provides power and serial communication to host PC

  • On board FTDI USB to UART conversion

  • DIN and SMA connectors and for interfacing with an external load

  • On board loads with jumper configurations for testing and evaluation without external components or connections

Applications

  • Surgical Tools

  • Surgical Tissue Sensing

  • Medical Diagnostics and Life Sciences Devices

  • Bio-Z and Vital Signs Applications

  • Electronics Testing Systems

  • Chemistry Systems

  • Laboratory Bench-top Sensing Applications

  • Research in Industry or Academia

System Architecture

https://media.githubusercontent.com/media/analogdevicesinc/documentation/main/docs/solutions/reference-designs/ad-imp2501-sl/images/eval-ad-imp2501-sl_block_diagram.png

Specifications

TBD from the characterization table what we want to include here:

Parameter

Min

Typ

Max

Units

Vin

4.6

5

20

V

Load Range

0.1

500k

Ohms

Relative Accuracy

0.2

0.015

%

Iout

mA

Vout

0.01

2.4

V

Samples/s

250

Frequency Range

0.1

1500k

Hz

DC Offset

-2.5

0

+2.5

V

Package Contents

AD-IMP2501EBZ-SL

  1. AD-IMP2501EBZ-SL Impedance Demonstration Board

  2. USB Cable

https://media.githubusercontent.com/media/analogdevicesinc/documentation/main/docs/solutions/reference-designs/ad-imp2501-sl/images/ad-imp2501ebz-sl.png

AD-IMP2501DBZ-SL

  1. AD-IMP2501DBZ-SL Impedance Analyzer Measurement Module

https://media.githubusercontent.com/media/analogdevicesinc/documentation/main/docs/solutions/reference-designs/ad-imp2501-sl/images/ad-imp2501dbz-sl.png

Important

It is critical to purchase both the AD-IMP2501DBZ-SL Impedance Analyzer Measurement Module and the AD-IMP2501EBZ-SL Impedance Demonstration Board. These are sold separately.

User guides

Follow these steps to start evaluating the AD-IMP2501DBZ-SL:

  1. Driver Installation

  2. Terminal Emulator/GUI Installation

  3. Hardware Setup

  4. Command Line or GUI Operation

  5. Performing Impedance Measurements

These steps are explained in detail in the following user guides: