One-phase shunt electricity meter reference design using standalone ADCs
TIDA-010036
This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.
This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.
See the Important Notice and Disclaimer covering reference designs and other TI resources.
Key Document
- One-Phase Shunt Electricity Meter Reference Design Using Standalone ADCs
(PDF 7442 KB)
30 Apr 2019
Description
This reference design implements Class 0.5 single-phase energy measurement using standalone multi-channel analog-to-digital converters (ADC) to sample a shunt current sensor. With the combination of the shunt sensor and a compact magnetically immune power supply, the design provides protection against magnetic tampering attacks. The design also provides the capability to detect potential tampering from neutral line disconnection. The combination of a high-performance ARM Cortex-M4 MCU to execute the metrology calculations and 8-kHz sampling rate allows the addition of power quality functions, such as individual harmonic analysis.
Features
- Class 0.5 single-phase metrology tested across 50-mA to 90-A input range
- Calculated parameters include active and reactive energy and power, RMS line current, RMS neutral current, RMS voltage, power factor, and line frequency
- Detects potential tamper attacks with low-power current detection mode
- Compact non-magnetic power supply using active clamped capacitor-drop regulator with power good indication and supply failure alerts
- RS-485 and RS-232 interfaces with 5kV RMS isolation
- Complete, tested reference design with hardware files and design guide
See the Important Notice and Disclaimer covering reference designs and other TI resources.
