Overview
The ADE7868ACPZ-RL, produced by Analog Devices Inc., is a high-accuracy, 3-phase electrical energy measurement IC. This device incorporates second-order sigma-delta (Σ-Δ) analog-to-digital converters (ADCs), a digital integrator, reference circuitry, and a fixed-function digital signal processor (DSP) to perform comprehensive energy measurements. It is designed to measure active, reactive, and apparent energy in various 3-phase configurations, including wye or delta services with both three and four wires. The device also supports system calibration features such as rms offset correction, phase calibration, and gain calibration, ensuring high accuracy in energy measurements.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| Active Energy Measurement Error (Per Phase) | 0.1% | - | 0.2% | - | Over a dynamic range of 1000 to 1, PGA = 1, 2, 4; integrator off |
| Reactive Energy Measurement Error (Per Phase) | 0.1% | - | 0.2% | - | Over a dynamic range of 1000 to 1, PGA = 1, 2, 4; integrator off |
| RMS Measurement Bandwidth | - | - | 2 kHz | - | I RMS and V RMS Measurement |
| AC Power Supply Rejection | - | - | 0.01% | - | VDD = 3.3 V + 120 mV rms at 120 Hz/100 Hz, IxP = VxP = ±100 mV rms |
| Operating Temperature Range | -40°C | - | +85°C | - | - |
| Package Type | - | - | 40-Lead LFCSP, Pb-free | - | - |
Key Features
- High accuracy 3-phase electrical energy measurement IC with second-order Σ-Δ ADCs, digital integrator, and reference circuitry.
- Measures active, reactive, and apparent energy in various 3-phase configurations (wye or delta services with three and four wires).
- Provides system calibration features: rms offset correction, phase calibration, and gain calibration.
- Three flexible pulse outputs (CF1, CF2, CF3) for power information: total active, reactive, and apparent powers, and sum of current rms values.
- Supports serial interfaces: SPI, I2C, and high-speed data capture (HSDC) port for real-time power information.
- Power quality measurements: short duration low or high voltage detection, high current variation, line voltage period measurement, and angles between phase voltages and currents.
- Low power modes to ensure energy accumulation continuity during tampering situations).
Applications
- Smart Meters: For accurate measurement of electrical energy consumption in residential, commercial, and industrial settings).
- Energy Monitoring Systems: To monitor and manage energy usage in real-time, enhancing energy efficiency and reducing waste).
- Industrial Automation: For precise energy measurement and control in industrial environments).
- Power Quality Analyzers: To detect and analyze power quality issues such as voltage and current variations, and harmonic distortions).
Q & A
- What is the primary function of the ADE7868ACPZ-RL?
The primary function of the ADE7868ACPZ-RL is to measure active, reactive, and apparent energy in 3-phase electrical systems with high accuracy).
- What types of 3-phase configurations does the ADE7868ACPZ-RL support?
The device supports wye or delta services with both three and four wires).
- What calibration features are available on the ADE7868ACPZ-RL?
The device provides rms offset correction, phase calibration, and gain calibration for each phase).
- What serial interfaces are supported by the ADE7868ACPZ-RL?
The device supports SPI, I2C, and a high-speed data capture (HSDC) port).
- What power quality measurements can the ADE7868ACPZ-RL perform?
The device can perform measurements such as short duration low or high voltage detection, high current variation, line voltage period measurement, and angles between phase voltages and currents).
- What is the operating temperature range of the ADE7868ACPZ-RL?
The operating temperature range is from -40°C to +85°C).
- What package type is the ADE7868ACPZ-RL available in?
The device is available in a 40-Lead LFCSP, Pb-free package).
- Does the ADE7868ACPZ-RL have low power modes?
Yes, the device has three specially designed low power modes to ensure continuity of energy accumulation during tampering situations).
- How often are the rms measurements updated?
RMS measurements are updated every 8 kHz, and low ripple rms values are averaged internally and updated every 1.024 seconds).
- What is the maximum differential level for the analog inputs?
The maximum differential level for the analog inputs is ±0.5 V peak).
