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ADE7761B:  Energy Metering IC with On-Chip Fault and Missing Neutral Detection

The ADE7761B is a high accuracy, fault-tolerant, electrical energy measurement IC intended for use with 2-wire distribution systems. The part specifications surpass the accuracy requirements as quoted in the IEC 62053-21 standard. The only analog circuitry used on the ADE7761B is in the ADCs and reference circuit. All other signal processing (such as multiplication and filtering) is carried out in ...More

ADE7761B:  Energy Metering IC with On-Chip Fault and Missing Neutral Detection

Product Description

The ADE7761B is a high accuracy, fault-tolerant, electrical energy measurement IC intended for use with 2-wire distribution systems. The part specifications surpass the accuracy requirements as quoted in the IEC 62053-21 standard. The only analog circuitry used on the ADE7761B is in the ADCs and reference circuit. All other signal processing (such as multiplication and filtering) is carried out in the digital domain. This approach provides superior stability and accuracy over extremes in environmental conditions and over time. The ADE7761B incorporates a fault detection scheme similar to the ADE7751 by continuously monitoring both phase and neutral currents. A fault is indicated when the currents differ by more than 6.25%.

The ADE7761B incorporates a missing neutral detection scheme by continuously monitoring the input voltage. When a missing neutral condition is detected (no voltage input), the ADE7761B continues billing based on the active current signal (see the Missing Neutral Mode section). The missing neutral condition is indicated when the FAULT pin goes high. The ADE7761B supplies average active power information on the low frequency outputs, F1 and F2. The CF logic output gives instantaneous active power information.

The ADE7761B includes a power supply monitoring circuit on the VDD supply pin. Internal phase matching circuitry ensures that the voltage and current channels are matched. An internal no-load threshold ensures that the ADE7761B does not exhibit any creep when there is no load.

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  • High accuracy, active energy measurement IC supports IEC 62053-21
  • Less than 0.1% error over a dynamic range of 1000 to 1
  • Supplies active power on the frequency outputs, F1 and F2
  • High frequency output CF is intended for calibration and supplies instantaneous active power
  • Continuous monitoring of the phase and neutral current allows fault detection in 2-wire distribution systems
  • Current channel input level best suited for shunt and current transformer sensors
  • Uses the larger of the two currents (phase or neutral) to bill, even during a fault condition
  • Continuous monitoring of the voltage and current inputs allows missing neutral detection
  • Uses one current input (phase or neutral) to bill when missing neutral is detected
  • Two logic outputs (FAULT and REVP) can be used to indicate a potential miswiring, fault, or missing neutral condition
  • Direct drive for electromechanical counters and 2-phase stepper motors (F1 and F2)
  • Proprietary ADCs and DSP provide high accuracy over large variations in environmental conditions and time
  • Meter Type: Single Phase
  • Supply Current : 3.65mA
  • Package: 20-Lead SSOP
  • Active Energy Accuracy: 0.1% over 1000:1 @25°C
  • Active Energy Bandwidth : 7kHz
  • VAR Energy Accuracy: 0.5% over 500:1 @ 25°C
  • Analog input range: +/- 660 mV peak
  • Reference Tempco : 30ppm/°C Typical

Functional Block Diagram for ADE7761B

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Part# Meter Type Measurement Parameters Current Sensor Interface On-Chip MCU Output Interface Anti-Tamper Support Package Price* (1000-4999)
ADE5166 Single Phase Irms, VA, Vrms, Watt Current Transformer, Shunt 8,052 I2C, Pulsed, SPI, UART Current Fault, Missing Neutral 64-Lead LQFP $3.46
ADE5169 Single Phase Irms, VA, VAR, Vrms, Watt Current Transformer, Rogowski Coil, Shunt 8,052 I2C, Pulsed, SPI, UART Current Fault, Missing Neutral 64-Lead LQFP $3.66
ADE5566 Single Phase Irms, VA, Vrms, Watt Current Transformer, Shunt 8,052 I2C, Pulsed, SPI, UART Missing Neutral 64-Lead LQFP $3.34
ADE5569 Single Phase Irms, VA, Vrms, Watt Current Transformer, Rogowski Coil, Shunt 8,052 I2C, Pulsed, SPI, UART Missing Neutral 64-Lead LQFP $3.59
ADE7116 Single Phase Irms, VA, Vrms, Watt Current Transformer, Shunt 8,052 I2C, Pulsed, SPI, UART Current Fault, Missing Neutral 64-Lead LQFP $2.60
ADE7156 Single Phase Irms, VA, Vrms, Watt Current Transformer, Shunt 8,052 I2C, Pulsed, SPI, UART Current Fault, Missing Neutral 64-Lead LQFP $2.69
ADE7166 Single Phase Irms, VA, Vrms, Watt Current Transformer, Shunt 8,052 I2C, Pulsed, SPI, UART Current Fault, Missing Neutral 64-Lead LQFP $2.99
ADE7169 Single Phase Irms, VA, VAR, Vrms, Watt Current Transformer, Rogowski Coil, Shunt 8,052 I2C, Pulsed, SPI, UART Current Fault, Missing Neutral 64-Lead LQFP $3.37
ADE7518 Single Phase Irms, VA, VAR, Vrms, Watt Current Transformer, Shunt 8,052 I2C, Pulsed, SPI, UART - 64-Lead LQFP $2.82
ADE7566 Single Phase Irms, VA, Vrms, Watt Current Transformer, Shunt 8,052 I2C, Pulsed, SPI, UART Missing Neutral 64-Lead LQFP $2.87
ADE7569 Single Phase Irms, VA, VAR, Vrms, Watt Current Transformer, Rogowski Coil, Shunt 8,052 I2C, Pulsed, SPI, UART Missing Neutral 64-Lead LQFP $3.29
ADE7751 Single Phase Watt Current Transformer, Shunt - Pulsed Current Fault 24-Lead SSOP $1.64
ADE7752A Polyphase Watt Current Transformer, Shunt - Pulsed - 24-Lead SOIC $4.35
ADE7752B Polyphase Watt Current Transformer, Shunt - Pulsed - 24-Lead SOIC $4.35
ADE7753 Single Phase Irms, VA, VAR, Vrms, Watt Current Transformer, Rogowski Coil, Shunt - Pulsed, SPI - 20-Lead SSOP $2.05
ADE7754 Polyphase Irms, VA, Vrms, Watt Current Transformer, Shunt - Pulsed, SPI - 24-Lead SOIC $5.06
ADE7755 Single Phase Watt Current Transformer, Shunt - Pulsed - 24-Lead PDIP, 24-Lead SSOP $1.55
ADE7757A Single Phase Watt Current Transformer, Shunt - Pulsed - 16-Lead SOIC $1.17
ADE7758 Polyphase Irms, VA, VAR, Vrms, Watt Current Transformer, Rogowski Coil, Shunt - Pulsed, SPI - 24-Lead SOIC $6.73
ADE7759 Single Phase Watt Current Transformer, Rogowski Coil, Shunt - Pulsed, SPI - 20-Lead SSOP $2.00
ADE7761B Single Phase Watt Current Transformer, Shunt - Pulsed Current Fault, Missing Neutral 20-Lead SSOP $1.38
ADE7762 Polyphase Watt Current Transformer, Shunt - Pulsed - 24-Lead SOIC $4.70
ADE7763 Single Phase Irms, VA, Vrms, Watt Current Transformer, Rogowski Coil, Shunt - Pulsed, SPI - 20-Lead SSOP $1.61
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ADE7769 Single Phase Watt Current Transformer, Shunt - Pulsed - 16-Lead SOIC $1.17
ADE7854 Polyphase Irms, VA, Vrms, Watt Current Transformer, Rogowski Coil, Shunt - HSDC, I2C, Pulsed, SPI - 40-Lead LFCSP -
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*The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
**Sample availability may be better than production availability. Please enter samples into your cart to check sample availability.