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AN2288 Folha de dados(PDF) 14 Page - STMicroelectronics

Nome de Peças AN2288
Descrição Electrónicos  Single-phase energy meter with tamper detection based on ST7FLITE2x
PDF  29 Pages
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Fabricante Electrônico  STMICROELECTRONICS [STMicroelectronics]
Página de início  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN2288 Folha de dados(HTML) 14 Page - STMicroelectronics

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Meter hardware
AN2288
14/29
Figure 9.
Gain switching circuit
4.1.7
EEPROM block
After power up, the accumulated kWh data, tampering information and calibration
parameters are read by the microcontroller and stored in the form of RAM variables. When
the meter is tampered, the tampering information (meter is tampered and tampered
channel) will be stored in the EEPROM immediately. When power goes off, the accumulated
kWh data will be stored in the EEPROM.
+
-
3.75V
R9
R8
From Analog switch
x 2
+
-
3.75V
R10
R7
From Analog switch
x 8
+
-
3.75V
R11
R14
From Analog switch
x32 or
x128
C39
Analog input to ADC
Analog input to ADC
Analog input to ADC
Controlled by MCU
R12
R13



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