90E23_14 datasheet(8/57 Pages) ATMEL

8 / 57 page

90E21/22/23/24

SINGLE-PHASE HIGH-PERFORMANCE WIDE-SPAN ENERGY METERING IC

Block Diagram

April 2, 2013

Figure-3 90E23 Block Diagram

Figure-4 90E24 Block Diagram

Reference Voltage

Power On Reset

Crystal Oscillator

3-wire or 4-wire SPI

Vref

I1P

I1N

L Line Forward/Reverse Active Power

L Line Apparent Power

L Line Irms

Vrms

I2P

I2N

MMD1

MMD0

CS SCLK SDO SDI

OSCI

OSCO

RESET

∑△

ADC

∑△

ADC

HPF1

HPF0

DSP Module

PGA

X1/X4/X8/

X16/X24

PGA

∑△

ADC

PGA

X1/X2/X4

Active Energy

Pulse Output

CF1

HPF1

HPF0

HPF1

HPF0

N Line Forward/Reverse Active Power

N Line Apparent Power

N Line Irms

Power Factor/

Angle/Frequency

WarnOut/IRQ/ZX

IRQ

WarnOut

Reference Voltage

Power On Reset

Crystal Oscillator

3-wire or 4-wire SPI

Vref

I1P

I1N

L Line Forward/Reverse Active/

Reactive Power

L Line Apparent Power

L Line Irms

Vrms

I2P

I2N

MMD1

MMD0

CS SCLK SDO SDI

OSCI

OSCO

RESET

∑△

ADC

∑△

ADC

HPF1

HPF0

DSP Module

PGA

X1/X4/X8/

X16/X24

PGA

∑△

ADC

PGA

X1/X2/X4

Active

Energy Pulse

Output

Reactive

Energy Pulse

Output

CF1

CF2

HPF1

HPF0

HPF1

HPF0

N Line Forward/Reverse Active/

Reactive Power

N Line Apparent Power

N Line Irms

Power Factor/

Angle/Frequency

WarnOut/IRQ/ZX

IRQ

WarnOut

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