Single-Ended Signal Conditioning Circuit for Current and Voltage Measurement Using Fluxgate Sensors
Description
This design provides a 4-channel signal conditioning solution for single-ended SAR ADCs integrated into a microcontroller measuring motor current using fluxgate sensors. Also provided is an alternative measurement circuit with external SAR ADCs as well as circuits for high-speed overcurrent and earth fault detection. Proper signal conditioning improves noise immunity on critical current measurements in motor drives. This reference design can help increase the effective resolution of the analog-to-digital conversion: improving motor drive efficiency.
Features
- Designed to measure all three phase motor currents along with DC link current through 6A Fluxgate Sensors (Scalable to 50A)Single-ended Signal Conditioning Circuit to interface Fluxgate Sensors with single-ended SAR ADCsMeasures current and voltage through integrated SAR ADCs of TI Piccolo™ F28027 microcontroller with a provision to interface the signal conditioning circuit with External ADCsTwo on-board 14-bit Dual Channel Simultaneous Sampling SAR ADCs with 4-wire SPI to interface with external motor controllersOverload and Earth Fault Protections for each channel with
Applications
- AC drive power stage module
- Motor diagnostics & monitoring
- Servo drive power stage module
- Servo drive power supply module
- Multifunction relay
- Residential breakers
- Condition monitoring sensor
- Substation automation
- Robot servo drive
Product Categories
- Amplifiers
| Download the bill of materials for TIDA-00208 | Download |
Test Data
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Download the test file for TIDA-00208| Title | Updated | Type | Size (KB) | |
|---|---|---|---|---|
| TIDA-00208 Gerber | 11 Nov 2014 | ZIP | 342 | |
| TIDA-00208 CAD Files | 11 Nov 2014 | ZIP | 2345 | |
| TIDA-00208 PCB | 11 Nov 2014 | 2911 | ||
| TIDA-00208 Assembly Drawing | 11 Nov 2014 | 603 | ||
| TIDA-00208 BOM | 11 Nov 2014 | 189 | ||
| TIDA-00208 Schematic and Block Diagram | 11 Nov 2014 | 884 |