90E21 Datasheet, PDF (8/57 Pages) Integrated Device Technology – Single-Phase High-Performance Wide-Span Energy Metering IC

90E21/22/23/24
SINGLE-PHASE HIGH-PERFORMANCE WIDE-SPAN ENERGY METERING IC
I1P
PGA
X1/X4/X8/
X16/X24
I1N
VP
PGA
VN
X1
I2P
PGA
X1/X2/X4
I2N
∑△ADC
∑△ADC
∑△ADC
DSP Module
MMD1
HPF1 HPF0
HPF1 HPF0
HPF1 HPF0
MMD0
L Line Forward/Reverse Active Power
L Line Apparent Power
L Line Irms
Vrms
N Line Forward/Reverse Active Power
N Line Apparent Power
N Line Irms
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
I1P
PGA
X1/X4/X8/
X16/X24
I1N
VP
PGA
VN
X1
I2P
PGA
X1/X2/X4
I2N
OSCI
OSCO
CS SCLK SDO SDI
CF1
Figure-3 90E23 Block Diagram
WarnOut IRQ ZX
MMD1
MMD0
∑△ADC
∑△ADC
DSP Module
HPF1 HPF0
HPF1 HPF0
L Line Forward/Reverse Active/
Reactive Power
L Line Apparent Power
L Line Irms
Vrms
∑△ADC
HPF1 HPF0
N Line Forward/Reverse Active/
Reactive Power
N Line Apparent Power
N Line Irms
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-4 90E24 Block Diagram
CF2 WarnOut IRQ ZX
Block Diagram
8
January 10, 2012