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STPM32 Datasheet(PDF) 15 Page - STMicroelectronics

Part # STPM32
Description  ASSP for metering applications with up to four independent 24-bit 2nd order sigma-delta ADCs, 4 MHz OSF and 2 embedded PGLNA
PDF  89 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STPM32 Datasheet(HTML) 15 Page - STMicroelectronics

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Table 6. Suggested external components in metering applications
Function
Component
Description
Value
Tolerance
Unit
Line voltage
interface
Resistor divider
R to R ratio VRMS = 230 V
1:1650
± 1%
50 ppm/°C
V/V
R to R ratio VRMS = 110 V
1:830
Line current
interface
Rogowski coil
Current to voltage ratio kS
0.15
± 5%
50 ppm/°C
mV/A
CT
2.4
± 5%
Shunt
0.3
± 5%
Note:
Above listed components refer to typical metering applications. The STPM3x operation is not limited to the
choice of these external components.
STPM32, STPM33, STPM34
Typical application example
DS10272 - Rev 13
page 15/89



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