Overview
The ADE7758ARWZ is a high-accuracy, 3-phase electrical energy measurement IC developed by Analog Devices Inc. This integrated circuit 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. It incorporates second-order Σ-Δ ADCs, a digital integrator, reference circuitry, and a temperature sensor, along with all the necessary signal processing for accurate energy measurements and rms calculations.
The ADE7758ARWZ features a serial interface and two pulse outputs, making it suitable for a wide range of applications requiring precise energy monitoring. It supports several international standards such as IEC 60687, IEC 61036, IEC 61268, IEC 62053-21, IEC 62053-22, and IEC 62053-23.
Key Specifications
| Parameter | Specification |
|---|---|
| Package Type | 24-Lead SOIC (0.295, 7.50mm Width) |
| Supply Voltage | 4.75V to 5.25V |
| Operating Temperature | -40°C to +85°C |
| Power Consumption | Typical 70 mW |
| Active Measurement Bandwidth | 14 kHz |
| Interface | SPI-compatible serial interface |
| Pulse Outputs | Two pulse outputs (active power and reactive/apparent power) |
| Accuracy | Less than 0.1% active energy error over a dynamic range of 1000 to 1 at 25°C |
Key Features
- High accuracy over large variations in environmental conditions and time due to proprietary ADCs and DSP.
- Digital power, phase, and rms offset calibration.
- On-chip, user-programmable thresholds for line voltage SAG and overvoltage detections.
- An on-chip digital integrator enables direct interface to current sensors with di/dt output.
- A PGA in the current channel allows direct interface to current transformers.
- Zero-crossing detection synchronized with the zero-crossing point of the line voltage.
- Supports IEC 60687, IEC 61036, IEC 61268, IEC 62053-21, IEC 62053-22, and IEC 62053-23 standards.
Applications
- General Purpose Energy Measurement
- Industrial Equipment
- Poly-phase energy meters of class 0.5S and class 1
- Power Monitoring for Home Automation
- PCs/servers
- Server Backplane Systems
- Telecommunications and data communications equipment
- Subsystem Power Measurement
- Intelligent Power Distribution Units
- Telecom Infrastructure
Q & A
- What is the primary function of the ADE7758ARWZ IC?
The primary function of the ADE7758ARWZ IC is to measure active, reactive, and apparent energy in 3-phase electrical systems.
- What types of 3-phase configurations does the ADE7758ARWZ support?
The ADE7758ARWZ supports various 3-phase configurations, including WYE or DELTA services with both three and four wires.
- What is the accuracy of the ADE7758ARWZ in terms of active energy measurement?
The ADE7758ARWZ has an active energy error of less than 0.1% over a dynamic range of 1000 to 1 at 25°C.
- What interface does the ADE7758ARWZ use for data communication?
The ADE7758ARWZ uses an SPI-compatible serial interface for data communication.
- What are the key calibration features provided by the ADE7758ARWZ?
The ADE7758ARWZ provides system calibration features including rms offset correction, phase calibration, and power calibration for each phase.
- How does the ADE7758ARWZ handle line voltage variations?
The ADE7758ARWZ has on-chip, user-programmable thresholds for line voltage SAG and overvoltage detections.
- What is the operating temperature range of the ADE7758ARWZ?
The operating temperature range of the ADE7758ARWZ is from -40°C to +85°C.
- What is the typical power consumption of the ADE7758ARWZ?
The typical power consumption of the ADE7758ARWZ is 70 mW.
- What package type is the ADE7758ARWZ available in?
The ADE7758ARWZ is available in a 24-lead SOIC package.
- What standards does the ADE7758ARWZ comply with?
The ADE7758ARWZ complies with several international standards including IEC 60687, IEC 61036, IEC 61268, IEC 62053-21, IEC 62053-22, and IEC 62053-23.
