ADE7868
Poly Phase Multifunction Energy Metering IC with Tamper Detection and Low Power Mode
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Overview
Features and Benefits
- Highly accurate; supports EN 50470-1, EN 50470-3, IEC 62053-21, IEC 62053-22, and IEC 62053-23 standards
- Compatible with 3-phase, 3- or 4-wire (delta or wye), and other 3-phase services
- Supplies total (fundamental and harmonic) active, reactive (ADE7878, ADE7868, and ADE7858 only), and apparent energy, and fundamental active/reactive energy (ADE7878 only) on each phase and on the overall system
- Less than 0.1% error in active and reactive energy over a dynamic range of 1000 to 1 at TA = 25°C
- Less than 0.2% error in active and reactive energy over a dynamic range of 3000 to 1 at TA = 25°C
- Supports current transformer and di/dt current sensors
- Dedicated ADC channel for neutral current input (ADE7868 and ADE7878 only)
- Less than 0.1% error in voltage and current rms over a dynamic range of 1000 to 1 at TA = 25°C
- 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 monitors phase currents for antitampering detection (ADE7868 and ADE7878 only)
- Battery supply input for missing neutral operation
- Phase angle measurements in both current and voltage channels with a typical 0.3° error
- Wide-supply voltage operation: 2.4 V to 3.7 V
- Reference: 1.2 V (drift +5 ppm/°C typical) with external overdrive capability
- Single 3.3 V supply
- 40-lead lead frame chip scale package (LFCSP), Pb-free
- Operating temperature: −40°C to +85°C
- Flexible I2C, SPI, and HSDC serial interfaces
Product Details
The ADE7854 / ADE7858 / ADE7868 / ADE7878 are high accuracy, 3-phase electrical energy measurement ICs with serial interfaces and three flexible pulse outputs. The ADE78xx devices incorporate second-order sigma-delta (Σ-∆) analog-to-digital converters (ADCs), a digital integrator, reference circuitry, and all of the signal processing required to perform total (fundamental and harmonic) active, reactive (ADE7878, ADE7868, and ADE7858), and apparent energy measurement and rms calculations, as well as fundamental-only active and reactive energy measurement (ADE7878) and rms calculations. A fixed function digital signal processor (DSP) executes this signal processing. The DSP program is stored in the internal ROM memory.
The ADE7854 / ADE7858 / ADE7868 / ADE7878 are suitable for measuring active, reactive, and apparent energy in various 3-phase configurations, such as wye or delta services, with both three and four wires. The ADE78xx devices provide system calibration features for each phase, that is, rms offset correction, phase calibration, and gain calibration. The CF1, CF2, and CF3 logic outputs provide a wide choice of power information: total active, reactive, and apparent powers, or the sum of the current rms values, and fundamental active and reactive powers.
The ADE7854 / ADE7858 / ADE7868 / ADE7878 contain waveform sample registers that allow access to all ADC outputs. The devices also incorporate power quality measurements, such as short duration low or high voltage detections, short duration high current variations, line voltage period measurement, and angles between phase voltages and currents. Two serial interfaces, SPI and I2C, can be used to communicate with the ADE78xx. A dedicated high speed interface, the high speed data capture (HSDC) port, can be used in conjunction with I2C to provide access to the ADC outputs and real-time power information. The ADE7854 / ADE7858 / ADE7868 / ADE7878 also have two interrupt request pins, IRQ0 and IRQ1, to indicate that an enabled interrupt event has occurred. For the ADE7868 / ADE7878, three specially designed low power modes ensure the continuity of energy accumulation when the ADE6878 / ADE7878 is in a tampering situation. See Table 1 for a quick reference chart listing each part and its functions. The ADE78xx are available in the 40-lead LFCSP, Pb-free package.
APPLICATIONS
- Energy metering systems
Product Categories
Product Lifecycle
Not Recommended for New Designs
This designates products ADI does not recommend broadly for new designs.
Evaluation Kits (1)
Documentation & Resources
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Differences Between the ADE7854A/ADE7858A/ADE7868A/ADE7878A and ADE7854/ADE7858/ADE7868/ADE7878 Products (Rev. AN-1272)3/22/2019PDF230 kB
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AN-1334: Impact of Adding a Neutral Attenuation Network in a 3P4W Wye System (Rev. 0)1/19/2016PDF316 K
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AN-1076: Calibrating an ADE7878-Based, 3-Phase Energy Meter (Rev. 0)6/25/2010PDF221 kB
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AN-639: Frequently Asked Questions (FAQs) Analog Devices Energy (ADE) Products (Rev. A)8/17/2005PDF165 kB
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UG-146: Evaluating the ADE7878 Energy Metering IC8/29/2010PDF1915 kB
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ADE78xx Polyphase Multifunction Energy Metering ICs1/16/2015PDF1 M
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FAQs7/26/2017
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RF Meets Power Lines: Designing Intelligent Smart Grid Systems that Promote Energy Efficiency3/5/2010
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IC Technology and Failure Mechanisms - Understanding Reliability Standards Can Raise Quality of Meters6/1/2004PDF903 kB
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Measuring Harmonic Energy with a Solid State Energy Meter9/30/2003PDF46 kB
Design Resources
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.
| Part Number | Material Declaration | Reliability Data | Pin/Package Drawing | CAD Symbols, Footprints & 3D Models |
|---|---|---|---|---|
| ADE7868ACPZ | Material Declaration | Reliability Data | 40-Lead LFCSP (6mm x 6mm w/ EP) | |
| ADE7868ACPZ-RL | Material Declaration | Reliability Data | 40-Lead LFCSP (6mm x 6mm w/ EP) | |
| Wafer Fabrication Data |
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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.