link to page 1 Polyphase Energy Metering ICwith Pulse OutputADE7752/ADE7752AFEATURES ADE7752A are the same. Both products are referred to in the High accuracy, supports 50 Hz/60 Hz IEC62053-2x text of this data sheet as ADE7752. Less than 0.1% error over a dynamic range of 500 to 1 The part specifications surpass the accuracy requirements as Compatible with 3-phase/3-wire delta and 3-phase/4-wire quoted in the IEC62053-2x standard. The only analog circuitry Wye configurations used in the ADE7752 is in the analog-to-digital converters (ADCs) The ADE7752 supplies average real power on frequency and reference circuit. All other signal processing (such as multi- outputs F1 and F2 plication, filtering, and summation) is carried out in the digital High frequency output CF is intended for calibration and domain. This approach provides superior stability and accuracy supplies instantaneous real powerLogic output REVP indicates a potential miswiring or over extremes in environmental conditions and over time. negative power for each phase The ADE7752 supplies average real power information on the Direct drive for electromechanical counters and 2-phase low frequency outputs, F1 and F2. These logic outputs may be stepper motors (F1 and F2) used to directly drive an electromechanical counter or to Proprietary ADCs and DSP provide high accuracy over large interface with an MCU. The CF logic output gives instanta- variations in environmental conditions and timeOn-chip power supply monitoring neous real power information. This output is intended to be On-chip creep protection (no load threshold) used for calibration purposes. On-chip reference 2.4 V ±8% (20 ppm/°C typical) with The ADE7752 includes a power supply monitoring circuit on external overdrive capability the VDD pin. The ADE7752 remains inactive until the supply Single 5 V supply, low power voltage on VDD reaches 4 V. If the supply falls below 4 V, no 60 mW typical: ADE7752 pulses are issued on F1, F2, and CF. Internal phase matching 30 mW typical: ADE7752ALow cost CMOS process circuitry ensures that the voltage and current channels are
phase matched. An internal no load threshold ensures the part GENERAL DESCRIPTION does not exhibit any creep when there is no load. The ADE7752 is available in a 24-lead SOIC package. The ADE7752 is a high accuracy polyphase electrical energy measurement IC. The ADE7752A is a pin-to-pin compatible low power version of ADE7752. The functions of ADE7752 and FUNCTIONAL BLOCK DIAGRAMVABSDD173IAP5ADCXPOWERIAN6HPFLPFSUPPLYVAP 16MONITORADC Φ PHASEADE7752/CORRECTIONADE7752AIBP7ADCX Σ IBN8HPF2DGNDLPF15VBPADC Φ 19 CLKINPHASECORRECTION20 CLKOUTICP9ADCXICN 10HPFLPFVCP 14ADC Φ VN 13DIGITAL-TO-FREQUENCY CONVERTERPHASE4k Ω CORRECTION2.4V REF 01 -0 A 1112418212223241 6- 67 AGNDREFIN/OUTREVPSCFS0S1F2F1CF 02