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90E21 Datasheet(PDF) 7 Page - Integrated Device Technology |
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90E21 Datasheet(HTML) 7 Page - Integrated Device Technology |
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7 / 57 page  90E21/22/23/24 SINGLE-PHASE HIGH-PERFORMANCE WIDE-SPAN ENERGY METERING IC Block Diagram 7 January 10, 2012 BLOCK DIAGRAM Figure-1 90E21 Block Diagram Figure-2 90E22 Block Diagram Reference Voltage Power On Reset Crystal Oscillator 3-wire or 4-wire SPI Vref I1P I1N VP VN L Line Forward/Reverse Active Power L Line Apparent Power L Line Irms Vrms CS SCLK SDO SDI OSCI OSCO RESET ∑△ ADC ∑△ ADC HPF1 HPF0 DSP Module PGA X1/X4/X8/ X16/X24 PGA X1 Active Energy Pulse Output CF1 HPF1 HPF0 Power Factor/ Angle/Frequency WarnOut/IRQ/ZX ZX IRQ WarnOut Reference Voltage Power On Reset Crystal Oscillator 3-wire or 4-wire SPI Vref I1P I1N VP VN L Line Forward/Reverse Active/ Reactive Power L Line Apparent Power L Line Irms Vrms CS SCLK SDO SDI OSCI OSCO RESET ∑△ ADC ∑△ ADC HPF1 HPF0 DSP Module PGA X1/X4/X8/ X16/X24 PGA X1 Active Energy Pulse Output Reactive Energy Pulse Output CF1 CF2 HPF1 HPF0 Power Factor/ Angle/Frequency WarnOut/IRQ/ZX ZX IRQ WarnOut |
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