Analog Devices Inc. EVAL-CN0411-ARDZ Evaluation Board

Analog Devices EVAL-CN0411-ARDZ Evaluation Board offers a design reference for the CN0411 Total Dissolved Solids (TDS) Measurement Circuit. The EVAL-CN0411-ARDZ is designed to work with the EVAL-ADICUP360 Development Board. The EVAL-CN0411-ARDZ comes in an Arduino shield form factor, making it possible to use additional pin-compatible development boards for evaluation and prototyping. The CN-0411 Demo Software allows the EVAL-ADICUP360 board to configure and read data from the EVAL-CN0411-ARDZ Evaluation Board. This data can be displayed using a serial port terminal program on a PC.

The CN0411 Circuit is a complete single supply, low power, high precision solution for Total Dissolved Solids (TDS) measurements, including temperature compensation. The CN0411 Circuit is optimized for conductivity measurements used to determine the TDS values using a 2-wire conductivity cell, connected either to the integrated BMC plug, or one of two terminal blocks provided.


  • CN0411 Circuit
    • AD7124-8 8-Channel, low noise, low power, 24-Bit, Sigma-Delta ADC with PGA and reference
    • AD8628 Zero-Drift, Single-Supply, RRIO Op amp
    • ADG836 0.5Ω CMOS, 1.65V to 3.6V Dual SPDT/2:1 MUX
    • AD8220 JFET Input instrumentation amplifier with Rail to-Rail output
    • ADG884 0.5Ω CMOS Dual 2:1 MUX/SPDT
    • ADG1608 4.5Ω RON, 8-Channel ±5V, +12V, +5V, and +3.3V multiplexer
    • AD5683R 16-Bit SPI nanoDAC+, with ±2 (16-Bit) LSB INL and 2ppm/°C external reference
  • Measures TDS using electrical conductivity
  • Measurement range from 1uS to 1S
  • Sensor Connections
    • BNC conductivity probe connector
    • 2-wire terminal block
    • 2-wire RTD terminal block
  • Arduino form factor compatible
  • Designed for use with EVAL-ADICUP360 development board

Test Setup

Analog Devices Inc. EVAL-CN0411-ARDZ Evaluation Board

Sample test setup of TDS and conductivity measurement using the EVAL-CN0411-ARDZ Evaluation Board and the EVAL-ADICUP360 Development Board.

Test Setup Block Diagram

Block Diagram - Analog Devices Inc. EVAL-CN0411-ARDZ Evaluation Board

Functional block TDS and conductivity measurement test setup.  A complete schematic of the evaluation board is contained in the CN-0411 Design Support Package, including layout, Gerber files, and a bill of materials.

Design Resources

Publicado: 2019-01-10 | Actualizado: 2023-07-31