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AN2288 数据表(PDF) 9 Page - STMicroelectronics

部件名 AN2288
功能描述  Single-phase energy meter with tamper detection based on ST7FLITE2x
PDF  29 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

AN2288 数据表(HTML) 9 Page - STMicroelectronics

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AN2288
Meter hardware
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4
Meter hardware
The block diagram of meter hardware is shown below:
Figure 4.
Energy meter block diagram
CT
CT
Phase line
Neutral line
Analog switches
control for switching
between CTs
CT = Current Transformer
ICP = In-Circuit Programming
Analog switch for
gain factor b/w
x32 & X128
Control
for
switching
between x32
& x\128
Op-Amps for
gain x2, x8,
x32 & x128
AC to DC
capacitive
power sup-
ply (5V)
ST7FLITE20
Voltage
follower
3.75V
Used
for
reference
EEPROM
SPI
EE-
PROM/RTC
LCD module
Tamper LED
Energy pulse
output LED
ICP
Power LED
RTC



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