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STPM32 Datasheet(PDF) 80 Page - STMicroelectronics

No. de pieza STPM32
Descripción Electrónicos  ASSP for metering applications with up to four independent 24-bit 2nd order sigma-delta ADCs, 4 MHz OSF and 2 embedded PGLNA
PDF  121 Pages
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STPM32 Datasheet(HTML) 80 Page - STMicroelectronics

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Application design and calibration
STPM32, STPM33, STPM34
80/121
DS10272 Rev 8
Setting CP = 64000 pulses/kWh (at LPWx = 1 - device default value) and according to
calculation above the following values are:
Table 35. Example 1 calculated data
Parameter
Value
Current sensor
sensitivity
LED frequency at
PN
VMAX
IMAX
IMIN
LSBP
LSBE
kS
Vref
2 C
P
1R1 R2
+

1800 DClk AV AI calV calI

------------------------------------------------------------------------------------
3.51mV A
==
LEDf
CP VN IN

3600000
-----------------------------
20.44Hz
==
IMIN
Vref
calI AI 2
15 k
S
kint

---------------------------------------------------------
5.97 mA
=
=
LSBP
Vref
2
1R1 R2
+

kint AV AI kS calV calI 2
28

-------------------------------------------------------------------------------------
0.818mW LSB
==
LSBE
Vref
2
1R1 R2
+

3600 DClk kint AV AI kS calV calI 2
17

--------------------------------------------------------------------------------------------------------------------------
0.214mWs LSB
==



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