AD5940

RECOMMENDED FOR NEW DESIGNS

High-Precision, Impedance & Electrochemical Front End

Part Models
2
1ku List Price
Starting From $5.35
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Part Details

  • Analog input
    • 16-bit ADC with both 800 kSPS and 1.6 MSPS options
    • Voltage, current, and impedance measurement capability
      • Internal and external current and voltage channels
      • Ultralow leakage switch matrix and input mux
    • Input buffers and programmable gain amplifier
  • Voltage DACs
    • Dual output voltage DAC with an output range of 0.2 V to 2.4 V
  • 12-bit VBIAS0 output to bias potentiostat
    • 6-bit VZERO0 output to bias TIA
    • Ultra low power: 1 µA
    • 1 high speed, 12-bit DAC
      • Output range to sensor: ±607 mV
      • Programmable gain amplifier on output with gain settings of 2 and 0.05
  • Amplifiers, accelerators, and references
    • 1 low power, low noise potentiostat amplifier suitable for potentiostat bias in electrochemical sensing
    • 1 low noise, low power TIA, suitable for measuring sensor current output
      • 50 pA to 3 mA range
      • Programmable load and gain resistors for sensor output
    • Analog hardware accelerators
      • Digital waveform generator
      • Receive filters
      • Complex impedance measurement (DFT) engine
    • 1 high speed TIA to handle wide bandwidth input signals from 0.015 Hz up to 200 kHz
    • Digital waveform generator for generation of sinusoid and trapezoid waveforms
    • 2.5 V and 1.82 V internal reference voltage sources
    • System level power savings
      • Fast power-up and power-down analog blocks for duty cycling
      • Programmable AFE sequencer to minimize workload of host controller
      • 6 kB SRAM to preprogram AFE sequences
      • Ultra low power potentiostat channel: 6.5 µAof current consumption when powered on and all other blocks in hibernate mode
    • Smart sensor synchronization and data collection
      • Cycle accurate control of sensor measurement
      • Sequencer controlled GPIOs
    • On-chip peripherals
      • SPI serial input/output
      • Wake-up timer
      • Interrupt controller
    • Power
    • 2.8 V to 3.6 V supply
    • 1.82 V input/output compliant
    • Power-on reset
    • Hibernate mode with low power DAC and potentiostat amplifier powered up to maintain sensor bias
    • Package and temperature range
    • 3.6 mm × 4.2 mm, 56-ball WLCSP
    • 7 mm × 7 mm, 48-lead LFCSP
    • Fully specified for operating temperature range of −40°C to +85°C
    • AD5940 and AD5941 fully specified for operating temperature range of −40°C to +85°C
    • AD5941W fully specified for operating temperature range of −40°C to +105°C
    • AEC-Q100 qualified for automotive applications
AD5940
High-Precision, Impedance & Electrochemical Front End
AD5940/AD5941 Simplified Block Diagram AD5940 Functional Block Diagram AD5940 Pin Configuration
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Software Resources


Evaluation Kits

eval board
EVAL-AD5940ELCZ

Electrochemical Evaluation Board

Product Details

The AD5940 is specifically designed for high precision analysis of electrochemical cells. This evaluation kit is designed to easily configure the AD5940 to perform electrochemical measurements on a typical electrochemical cell. The evaluation kit includes the EVAL-ADICUP3029 Arm® Cortex-M3 microcontrollerbased Arduino Uno form factor board, the EVAL-AD5940ELCZ daughter board and custom micro USB to crocodile cables to connect the hardware to various chemistry setups.

eval board
EVAL-AD5940BIOZ

Bio-Electric Evaluation Board

Product Details

The AD5940 is specifically designed for bio-impedance applications including Body Impedance Analysis (BIA) and Electrodermal Activity (EDA). This evaluation kit includes the EVAL-ADICUP3029 Arm® Cortex-M3 microcontrollerbased Arduino Uno form factor board, the EVAL-AD5940BIOZ which contains the AD5940 for bio-impedance and the AD8233 for ECG measurements and also custom micro USB - ECG snap connectors.

eval board
EVAL-HCRWATCH4Z

Vital Signs Monitoring (VSM) Watch

Features and Benefits

  • Vital signs monitoring platform
  • Wearable battery powered platform
  • Real-time live data view
  • Data storage to flash memory for offline analyses
  • Easy configuration

Product Details

The vital signs monitoring (VSM) watch, EVAL-HCRWATCH4Z, is a modular development, demonstration, and data collection platform for high performance vital signs monitoring applications based on Analog Devices, Inc., analog front ends (AFEs) and sensors.

The VSM watch is a wearable, battery-powered device that enables the continuous monitoring and on-demand spot check measurement of photoplethysmography (PPG), electrodermal activity (EDA, bioimpedance-based), skin temperature, electrocardiography (ECG, biopotential based), and motion/activity (based on a 3‑axis accelerometer).

The VSM watch allows synchronized, multiparameter data storage on internal memory for later data retrieval and offline analysis and/or live monitoring on a PC (Windows® OS) or Android- or iOS-based device.

EVAL-AD5940ELCZ
Electrochemical Evaluation Board
AD5940 Evaluation Board AD5940 Evaluation Board - Top View AD5940 Evaluation Board - Bottom View
EVAL-AD5940BIOZ
Bio-Electric Evaluation Board
EVAL-AD5940BIOZ  Bio-Electric Evaluation Board EVAL-AD5940BIOZ  Bio-Electric Evaluation Board EVAL-AD5940BIOZ  Bio-Electric Evaluation Board EVAL-AD5940BIOZ  Bio-Electric Evaluation Board
EVAL-HCRWATCH4Z
Vital Signs Monitoring (VSM) Watch
EVAL-HCRWATCH4Z Platform

Reference Designs

Simplified Circuit Block Diagram
CN0510 Circuits from the lab

Electrochemical Impedance Spectroscopy (EIS) for Batteries

Features and Benefits

  • Designed for Lithium Ion Battery Testing
  • Milli-hertz to Kilo-hertz frequency sweep
  • Arduino Shield Compatible

CN0565 01 new
CN0565 Circuits from the lab

Electrical Impedance Tomography Measurement System

Features and Benefits

  • Up to 24 Input Electrodes, Software Selectable 
  • 2-wire or 4-wire Electrode Configuration Supported
  • Real and Imaginary Measurements up to 200 kHz
  • Open Source Image Recreation Algorithms
  • Isolated Power and Digital Domains from the Host
  • Arduino Form Factor Compatible
CN0510
Electrochemical Impedance Spectroscopy (EIS) for Batteries
Simplified Circuit Block Diagram
Modified Randel Circuit Model; Nyquist Plot is a Li-Ion Battery with SEI Evident
Reference Design Board
CN0565
Electrical Impedance Tomography Measurement System
CN0565 01 new
EVAL-CN0565-ARDZ
EVAL-CN0565-ARDZ - Top View
EVAL-CN0565-ARDZ - Bottom View
EVAL-CN0565-ARDZ with Test Board

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