90E21_14 Datasheet, PDF (7/57 Pages) ATMEL Corporation – Single-Phase High-Performance

90E21/22/23/24
BLOCK DIAGRAM
I1P
PGA
X1/X4/X8/
X16/X24
I1N
VP
PGA
X1
VN
∑△ADC
∑△ADC
SINGLE-PHASE HIGH-PERFORMANCE WIDE-SPAN ENERGY METERING IC
DSP Module
HPF1 HPF0
HPF1 HPF0
L Line Forward/Reverse Active Power
L Line Apparent Power
L Line Irms
Vrms
Vref
RESET
Reference Voltage
Power On Reset
Crystal Oscillator
3-wire or 4-wire SPI
Active Energy
Pulse Output
WarnOut/IRQ/ZX
Power Factor/
Angle/Frequency
OSCI
OSCO
CS SCLK SDO SDI
CF1
Figure-1 90E21 Block Diagram
WarnOut IRQ ZX
I1P
PGA
X1/X4/X8/
I1N
X16/X24
VP
PGA
VN
X1
∑△ADC
∑△ADC
DSP Module
HPF1 HPF0
HPF1 HPF0
L Line Forward/Reverse Active/
Reactive Power
L Line Apparent Power
L Line Irms
Vrms
Vref
RESET
Reference Voltage
Power On Reset
Crystal Oscillator
3-wire or 4-wire SPI
Active
Reactive
Energy Pulse Energy Pulse
Output
Output
WarnOut/IRQ/ZX
Power Factor/
Angle/Frequency
OSCI
OSCO
CS SCLK SDO SDI
CF1
Figure-2 90E22 Block Diagram
CF2 WarnOut IRQ ZX
Block Diagram
7
April 2, 2013