ADE7762

Obsolete

Polyphase Energy Metering IC with Phase Drop Indication

Data Sheet (Rev. 0) Product Selection Table

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Overview

High accuracy supports 50 Hz/60 Hz IEC 62053-21
Less than 0.1% error over a dynamic range of 500 to 1
Compatible with 3-phase, 3-wire delta and 3-phase, 4-wire Wye configurations
Supplies average active power on the frequency outputs F1 and F2
High frequency output (CF) is intended for calibration and supplies instantaneous active power
Logic output REVP indicates a potential miswiring or negative power on the sum of all phases

Dropout indication for each phase on LED driver pins
Phase sequence error detection
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 over time
On-chip power supply monitoring
On-chip creep protection (no load threshold)

The ADE7762 is a high accuracy polyphase electrical energy measurement IC. The ADE7762 specifications surpass the accuracy requirements as quoted in the IEC62053-21 standard.

The only analog circuitry used in the ADE7762 is in the analog-to-digital converters (ADCs) and reference circuit. All other signal processing (for example, multiplication, filtering, and summation) is carried out in the digital domain. This approach provides superior stability and accuracy over extremes in environmental conditions and over time.

The ADE7762 supplies average active power information on the low frequency outputs, F1 and F2. These logic outputs can be used to directly drive an electromechanical counter or to interface with a microcontroller (MCU). The CF logic output gives instantaneous active power information. This output is intended to be used for calibration purposes.

The ADE7762 includes a power supply monitoring circuit on the VDD pin. The ADE7762 remains inactive until the supply voltage on VDD reaches 4 V. If the supply falls below 4 V, the ADE7762 resets and no pulses are issued on F1, F2, and CF.

A multiple multiplexed logic output provides phase dropout per phase, reverse polarity per phase, and a phase sequence error. Internal phase matching circuitry ensures that the voltage and current channels are phase matched. An internal no load threshold ensures that the ADE7762 does not exhibit any creep when there is no load.

The ADE7762 is available in a 28-lead SOIC package.

Suggested Replacement Parts

Low Power Polyphase Energy Metering IC with Pulse Output