Overview
The ADE9078ACPZ-RL, produced by Analog Devices Inc., is a highly accurate, fully integrated energy metering device designed for advanced and precise energy measurements. This polyphase energy metering Analog Front End (AFE) supports a wide range of metering applications, including polyphase meters and power quality monitoring. It integrates seven high-performance Analog-to-Digital Converters (ADCs) and a flexible Digital Signal Processor (DSP) core, ensuring low drift over temperature and high metrology performance for Class 1 up to Class 0.2 meters.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| VDD | 2.7 | - | 3.63 | V | - |
| Measurement Error per Phase (Total Active Energy) | 0.1% | - | 0.2% | - | Over a dynamic range of 5000 to 1, 10 sec accumulation; gain compensation only |
| Gain Error | ±0.3% | ±1% | - | - | See the Terminology section |
| Gain Drift | ±3 ppm/°C | - | - | - | See the Terminology section |
| Offset | ±0.36 mV | ±3.8 mV | - | - | See the Terminology section |
| Offset Drift | 0 | ±6 μV/°C | - | - | See the Terminology section |
| Channel Drift (PGA, ADC, Internal Voltage Reference) | ±7 ppm/°C | ±25 ppm/°C | - | - | PGA = 1, internal VREF |
| Differential Input Impedance (DC) | 330 kΩ | 366 kΩ | - | - | PGA = 1 |
| LOGIC OUTPUTS (MISO, IRQ0, and IRQ1) | 2.4 V | - | - | V | Output Voltage High, ISOURCE = 4 mA |
Key Features
- High-Performance ADCs: Seven integrated high-performance ADCs with programmable gain amplifiers (PGA) and low drift over temperature.
- Flexible DSP Core: A flexible DSP core for advanced metrology calculations and waveform analysis.
- Waveform Buffer: An integrated waveform buffer that stores samples at a fixed data rate or a sampling rate that varies based on line frequency, supporting harmonic analysis according to IEC 61000-4-7.
- Power Modes: Two power modes (PSM1 and PSM2) for detecting meter tampering and fast measurement of current and voltage rms, active power, and VAR.
- High-Speed Communication: A 10 MHz serial peripheral interface (SPI) for high-speed data transfer.
- Sensor Compatibility: Interfaces with both current transformer (CT) and Rogowski coil sensors.
- Standards Compliance: Supports various energy measurement standards including IEC 62053-21, IEC 62053-22, EN50470-3, OIML R46, and ANSI C12.20.
Applications
- Polyphase Meters: Suitable for developing 3-phase metrology platforms for a wide range of polyphase meters.
- Power Quality Monitoring: Enables accurate measurements for power quality monitoring applications.
- Protective Devices: Used in protective devices to ensure accurate and reliable energy measurements.
Q & A
- What is the ADE9078ACPZ-RL used for?
The ADE9078ACPZ-RL is used for advanced and precise energy measurements in polyphase meters, power quality monitoring, and protective devices.
- What are the key features of the ADE9078ACPZ-RL?
Key features include seven high-performance ADCs, a flexible DSP core, waveform buffer, power modes for tamper detection, high-speed SPI communication, and compatibility with CT and Rogowski coil sensors.
- What standards does the ADE9078ACPZ-RL comply with?
The device complies with various energy measurement standards including IEC 62053-21, IEC 62053-22, EN50470-3, OIML R46, and ANSI C12.20.
- What is the operating voltage range of the ADE9078ACPZ-RL?
The operating voltage range is from 2.7 V to 3.63 V.
- How accurate is the ADE9078ACPZ-RL in measuring energy?
The device has a measurement error per phase of 0.1% to 0.2% over a dynamic range of 5000 to 1, with gain compensation.
- What types of sensors does the ADE9078ACPZ-RL support?
The device supports both current transformer (CT) and Rogowski coil sensors.
- What is the purpose of the waveform buffer in the ADE9078ACPZ-RL?
The waveform buffer stores samples at a fixed data rate or a sampling rate that varies based on line frequency, supporting harmonic analysis according to IEC 61000-4-7.
- How does the ADE9078ACPZ-RL detect meter tampering?
The device has two power modes (PSM1 and PSM2) that enable detection of meter tampering through low power comparators and fast measurement of current and voltage rms, active power, and VAR.
- What is the communication interface of the ADE9078ACPZ-RL?
The device features a 10 MHz serial peripheral interface (SPI) for high-speed data transfer.
- What is the temperature range for the ADE9078ACPZ-RL?
The device operates over a temperature range of -40°C to +85°C.
