Dual Sensor Measurement Using Single Current-Loop with FSK Modulation Reference Design
Description
The TIDA-00483 reference design demonstrates a 4-20mA current loop subsystem capable of measuring the surrounding environment and communicating the temperature: humidity: and ambient light over the loop. The small footprint of the design contains all sensors: filters: and control circuitry to calculate and communicate the sensor data. The reference design is intended for process measurement applications in factory automation: field transmitters and building automation. The sensors: MCU and communication modules all run from the current loop power: requiring less than 3.5 mA.
Features
- Reduce cabling and installation cost by transmitting two variable parameters simultaneously on a 4-20mA current loopExpandable to additional sensor parameters via FSK-modulated digital data streamDual op-amp 4th order Butterworth filter for FSK generation reduces BOM countUltra Low power MSP430 consumes less of the 3.5 mA budget allowing more current for sensors in the loop
Applications
- Temperature transmitter
- Process analytics
- HVAC controller
- Level transmitter
- Position sensor
- HVAC valve & actuator control
- Proximity switch
- Access control
- Safety area scanner
- Force & torque sensor
- Safety light curtain
- Flow transmitter
- Pressure transmitter
Product Categories
- Data converters
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| Download the bill of materials for TIDA-00483 | Download |
Test Data
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Download the test file for TIDA-00483| Title | Updated | Type | Size (KB) | |
|---|---|---|---|---|
| TIDA-00483 CAD Files | 03 Nov 2015 | ZIP | 3187 | |
| TIDA-00483 Gerber | 02 Nov 2015 | ZIP | 655 | |
| TIDA-00483 PCB | 02 Nov 2015 | 1901 | ||
| TIDA-00483 Assembly Drawing | 02 Nov 2015 | 200 | ||
| TIDA-00483 BOM | 02 Nov 2015 | 141 | ||
| TIDA-00483 Schematic and Block Diagram | 02 Nov 2015 | 614 |