CN0376 is a dual-channel, channel-to-channel isolated, thermocouple or RTD input suitable for programmable logic controllers (PLC) and distributed control systems (DCS). Each channel can accept either a thermocouple or a RTD input. The entire circuit is powered from a standard 24 V bus supply.
The AD7124-4 24-bit, Σ-Δ ADC with programmable gain array (PGA) and voltage reference provides the complete set of features to implement a flexible input capable of connection to either thermocouple or RTD sensors. Features include on-chip reference, PGA, excitation currents, bias voltage generator, and flexible filtering with enhanced 50 Hz and 60 Hz rejection options. The AD7124-4 is in a small 5 mm × 5 mm LFCSP package, making it ideal in channel-to-channel isolated designs where space is a premium. It also includes multiple diagnostic functions that are available to the user. The ADuM5010 isolated dc-to-dc converter provides 3.3 V isolated power via integrated isoPower® technology. The ADuM1441 isolates the serial peripheral interface (SPI) for the AD7124-4. The ADuM1441 micropower isolator consumes only 4.8 µA per channel when idle, resulting in an energy efficient solution. The ADP2441 36 V, step-down, dc-to-dc regulator accepts an industrial standard 24 V supply, with wide tolerance on the input voltage and steps it down to 5V to be used by the system.
THe EVAL-CN0376-SDPZ evaluation connects to ADI's System Demonstration Platform(SDP) and also features PMOD-compatible headers for interfacing with other development platforms.
Jumper Positon EXT
Jumper Positon PMOD
NOTE: It is recommended that you install the CN-0376 Evaluation Software to the default directory path C:\Program Files\Analog Devices\CN0376\ and all National Instruments products to C:\Program Files\National Instruments\
NOTE: It is recommended that you close all other applications before clicking “Next”. This will make it possible to update relevant system files without having to reboot your computer.
It is recommended that you install the drivers to the default directory path
C:\Program Files\Analog Devices\SDP\Drivers
User needs to sample data first using Run to get histogram data on this page.
Allows for ADC configuration of either channel
Power Mode - Select Power Mode of the ADC. This affects power consumption and ADC data rate. Please consult [ADI>AD7124-4] datasheet for more information
Filter Type - Select the digital filter used for the ADC conversion. Please consult [ADI>AD7124-4] datasheet for more information
Post Filter - Select the data rate when the Post Filter are used
Sampling Rate - Slider control to change the ADC data rate. The numerical display shows the corresponding data rate. This is dependent on the power mode and filter type
Enabled/Disabled - Toggle to enable or disable the corresponding channel
Configure - Press this button to apply the configurations to the corresponding channel
Allows control of Excitation Current, Burnout Current, PGA Gain and for enabling ADC Error Checks
ADC Error Indicators. Please consult [ADI>AD7124-4] datasheet for information regarding the ADC Errors
The software saves the spreadsheet file as ASCII text with columns separated by tabs