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EVAL-CN0394-ARDZ Shield
Overview
The EVAL-CN0394-ARDZ shield is a single supply, multi channel thermocouple temperature meter. The CN0394 uses ADuCM360 Low Power, Precision Analog Microcontroller with Dual Sigma-Delta ADCs, ARM Cortex-M3 as integrated solution for multi channel thermocouple temperature measurement with RTD cold junction compensation. The CN0394 support EVAL-ADICUP360 Arduino compatible form factor development board.
Equipment
- EVAL-CN0394-ARDZ Circuit Evaluation Board
- EVAL-ADICUP360 Development Board
- Any combination of B, E, J, K, N, R, S, T type thermocouples (total of 4)
- PC with Microsoft Windows 7 64-bit or later and USB 2.0 port or higher
- Serial terminal software
- Such as Putty or Tera Term
General Setup
- Connect the EVAL-CN0394-ARDZ to EVAL-ADICUP360 board
- Connect 4 thermocouples to EVAL-CN0394-ARDZ P1~P4, marked on PCB with CH0~CH3
- Connect the EVAL-ADICUP360 USER USB port to PC with USB cable
Connectors and Configurations
Thermocouple Connectors
Each of the four(4) channels uses an Omega style connector for the thermocouples, which makes it easier to plug in and out different thermocouple types. Type U was selected so that all the channels on the board (P1 - P4) would be universal and interchangeable.
There is an RTD beneath the copper tabs of each connector which is used to measure the cold junction temperature. So no external cold junction measurement is needed with this board.
Analog Sensor Inputs
The analog outputs of each thermocouple channel and each RTD channel are connected directly to connector P6. Each of these analog voltages is passed directly to the ADuCM360 on the EVAL-ADICUP360 board. And is processed using the 24-bit sigma-deltas which are integrated into that IC.
| P6 Pin Connections | Sensor/Channel |
|---|---|
| Pin 1 | Thermocouple+ (P1) |
| Pin 2 | Thermocouple+ (P2) |
| Pin 3 | Thermocouple+ (P3) |
| Pin 4 | Thermocouple+ (P4) |
| Pin 5 | RTD Output (R1) |
| Pin 6 | RTD Output (R2) |
| Pin 7 | RTD Output (R3) |
| Pin 8 | RTD Output (R4) |
| P7 Pin Connections | Sensor/Channel |
|---|---|
| Pin 1 | RTD Common |
| Pin 4 | Thermocouple Common (-) |
| Pin 7 | Voltage Reference |
Schematic, PCB Layout, Bill of Materials
EVAL-CN0394-ARDZ Design & Integration Files
Software
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