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