Overview
The ADE7858ACPZ, produced by Analog Devices Inc., is a high-accuracy, 3-phase electrical energy measurement IC. It is part of the ADE7854/ADE7858/ADE7868/ADE7878 family, designed to measure active, reactive, and apparent energy in various 3-phase configurations, including wye or delta services with three or four wires. This IC incorporates second-order sigma-delta (Σ-∆) analog-to-digital converters (ADCs), a digital integrator, reference circuitry, and a fixed function digital signal processor (DSP) to perform comprehensive energy measurements and calculations.
Key Specifications
| Parameter | Value |
|---|---|
| Supply Voltage | 2.4 V to 3.7 V |
| Reference Voltage | 1.2 V (drift +5 ppm/°C typical) |
| Operating Temperature | −40°C to +85°C |
| Package Type | 40-lead lead frame chip scale package (LFCSP), Pb-free |
| Serial Interfaces | I2C, SPI, and HSDC |
| Error in Active and Reactive Energy | Less than 0.1% over a dynamic range of 1000 to 1 at TA = 25°C |
| Error in Voltage and Current RMS | Less than 0.1% over a dynamic range of 1000 to 1 at TA = 25°C |
| Phase Angle Measurement Error | Typical 0.3° |
Key Features
- High accuracy in measuring active, reactive, and apparent energy, compliant with EN 50470-1, EN 50470-3, IEC 62053-21, IEC 62053-22, and IEC 62053-23 standards.
- Supports current transformer and di/dt current sensors.
- Dedicated ADC channel for neutral current input (in ADE7868 and ADE7878 models).
- Supplies sampled waveform data on all three phases and on neutral current.
- Selectable no load threshold levels for total and fundamental active and reactive powers, as well as for apparent powers.
- Low power battery mode for phase current monitoring and antitampering detection (in ADE7868 and ADE7878 models).
- Phase angle measurements in both current and voltage channels.
Applications
The ADE7858ACPZ is primarily used in energy metering systems, including smart meters and industrial power monitoring systems. It is suitable for various 3-phase configurations, making it versatile for different energy measurement applications.
Q & A
- What is the primary function of the ADE7858ACPZ?
The primary function is to measure active, reactive, and apparent energy in 3-phase electrical systems. - What are the supported serial interfaces?
The supported serial interfaces are I2C, SPI, and HSDC. - What is the operating temperature range of the ADE7858ACPZ?
The operating temperature range is −40°C to +85°C. - Does the ADE7858ACPZ support current transformer and di/dt current sensors?
Yes, it supports both current transformer and di/dt current sensors. - What is the typical error in phase angle measurements?
The typical error in phase angle measurements is 0.3°. - Is the ADE7858ACPZ compliant with any specific standards?
Yes, it is compliant with EN 50470-1, EN 50470-3, IEC 62053-21, IEC 62053-22, and IEC 62053-23 standards. - What is the package type of the ADE7858ACPZ?
The package type is a 40-lead lead frame chip scale package (LFCSP), Pb-free. - Does the ADE7858ACPZ have a dedicated ADC channel for neutral current input?
No, this feature is available in the ADE7868 and ADE7878 models. - What is the supply voltage range for the ADE7858ACPZ?
The supply voltage range is 2.4 V to 3.7 V. - Does the ADE7858ACPZ support low power battery mode?
No, this feature is available in the ADE7868 and ADE7878 models.
