Overview
The ADE7868ACPZ, produced by Analog Devices Inc., is a high-accuracy, 3-phase electrical energy measurement IC designed for various energy metering applications. This device incorporates second-order sigma-delta (Σ-Δ) analog-to-digital converters (ADCs), a digital integrator, reference circuitry, and comprehensive signal processing capabilities to measure active, reactive, and apparent energy in 3-phase configurations such as wye or delta services with both three and four wires.
The ADE7868ACPZ features a fixed function digital signal processor (DSP) that executes the signal processing, with the DSP program stored in internal ROM memory. It also includes system calibration features for each phase, such as rms offset correction, phase calibration, and gain calibration.
Key Specifications
| Specification | Value |
|---|---|
| Supply Voltage | 2.4 V to 3.7 V |
| Reference Voltage | 1.2 V (drift +5 ppm/°C typical) with external overdrive capability |
| Operating Temperature | −40°C to +85°C |
| Package Type | 40-lead, Pb-free LFCSP |
| Serial Interfaces | I2C, SPI, and HSDC |
| Power Modes | Normal Power Mode, Reduced Power Mode, Low Power Mode, Sleep Mode |
| Total Active Energy Measurement Accuracy | 0.1% over a dynamic range of 1000 to 1, PGA = 1, 2, 4; integrator off |
| Signal-to-Noise-and-Distortion (SINAD) Ratio | Calculated over a 2 sec window, expressed in decibels |
| Analog Inputs | Fully differential voltage inputs with a maximum differential level of ±0.5 V peak |
Key Features
- High accuracy measurement of active, reactive, and apparent energy in 3-phase configurations.
- Second-order Σ-Δ analog-to-digital converters (ADCs) and a digital integrator.
- System calibration features for each phase, including rms offset correction, phase calibration, and gain calibration.
- Three flexible pulse outputs (CF1, CF2, CF3) providing various power information.
- Low power modes for energy accumulation during tampering situations (PSM1, PSM2, PSM3).
- Battery supply input for missing neutral operation.
- Phase angle measurements in both current and voltage channels with a typical 0.3° error.
- Power quality measurements, including short duration low or high voltage detection and line voltage period measurement.
Applications
- Energy metering systems.
- Smart grid applications.
- Industrial power monitoring.
- Commercial and residential energy measurement.
Q & A
- What is the primary function of the ADE7868ACPZ?
The primary function of the ADE7868ACPZ is to measure active, reactive, and apparent energy in 3-phase electrical configurations.
- What types of serial interfaces does the ADE7868ACPZ support?
The ADE7868ACPZ supports I2C, SPI, and HSDC serial interfaces.
- What are the different power modes available on the ADE7868ACPZ?
The ADE7868ACPZ has Normal Power Mode, Reduced Power Mode, Low Power Mode, and Sleep Mode.
- How accurate is the total active energy measurement of the ADE7868ACPZ?
The total active energy measurement accuracy is 0.1% over a dynamic range of 1000 to 1, PGA = 1, 2, 4; integrator off.
- What is the operating temperature range of the ADE7868ACPZ?
The operating temperature range is −40°C to +85°C.
- Does the ADE7868ACPZ support phase angle measurements?
Yes, it supports phase angle measurements in both current and voltage channels with a typical 0.3° error.
- What is the purpose of the CF1, CF2, and CF3 logic outputs?
The CF1, CF2, and CF3 logic outputs provide a wide selection of power information, including total active, reactive, and apparent powers, as well as the sum of the current rms values.
- Does the ADE7868ACPZ have any tamper detection features?
Yes, it includes low power modes for energy accumulation during tampering situations.
- What is the package type of the ADE7868ACPZ?
The package type is a 40-lead, Pb-free LFCSP.
- What are some common applications of the ADE7868ACPZ?
Common applications include energy metering systems, smart grid applications, industrial power monitoring, and commercial and residential energy measurement.
