Key facts
- Brand
- Analog Devices
- Model
- ADE7756
- Industry
- Industrial
- Documents
- 6
- Languages
- EN
- Last added
- 2012-08-02
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Analog Devices AN-578 RMS Calculation for Energy Meter Applications Using the ADE7756
The document details a cost-effective architecture for single-phase energy meters that measures active energy, voltage RMS, and current RMS. It utilizes the ADE7756's waveform sampling mode in conjunction with an 8-bit Microchip PIC16C63 microcontroller to process these measurements without requiring a programmable DSP component.
The note covers the theoretical basis for RMS, power factor, and reactive energy calculations, specifically addressing error compensation techniques such as offset calibration and ripple frequency attenuation. It outlines specific design choices regarding sampling rates, microcontroller clock speeds (up to 20 MHz), and SPI communication optimization to achieve a measurement accuracy within 1%.
Analog Devices ADE7756 specifications
| Resolution | 16-bit |
|---|---|
| Linearity Error | < 0.3% |
| Measurement Bandwidth | 14 kHz |
| Equivalent Sampling Frequency | 28 ksps |
| Temperature Sensor Resolution | 1LSB/°C |
Source: Analog Devices ADE7756 Single-Phase Energy Metering IC Datasheet
All Analog Devices ADE7756 documents by type
Ratings, dimensions and ordering codes, for selection and design work.
How to use the product for one specific task, with worked examples.
Questions answered in these manuals
What microcontroller is used in this design?
The solution uses a standard 8-bit Microchip PIC16C63 microcontroller.
From: Analog Devices AN-578 RMS Calculation for Energy Meter Applications Using the ADE7756
What is the target accuracy for RMS measurement?
The goal of the solution is to comply within 1% accuracy in the rms measurement display.
From: Analog Devices AN-578 RMS Calculation for Energy Meter Applications Using the ADE7756
What is the power supply requirement for the ADE7756?
The device operates with a single 5V power supply.
From: Analog Devices ADE7756 Single-Phase Energy Metering IC Datasheet
Can the ADE7756 be used as an ADC?
Yes, it can be used as an ADC in addition to energy measurement to calculate Vrms or Irms.
From: Analog Devices ADE7756 Single-Phase Energy Metering IC Datasheet
What is the intended application for this power meter design?
The design is for use in the North American 3-wire/single-phase application.
From: A Power Meter Reference Design Based on the ADE7756 Application Note
Can this meter be used in a single-phase, 2-wire distribution system?
Yes, it can be used with a minimal amount of changes.
From: A Power Meter Reference Design Based on the ADE7756 Application Note