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AN3095 Folha de dados(PDF) 29 Page - STMicroelectronics

Nome de Peças AN3095
Descrição Electrónicos  The STEVAL-ISV002V2 demonstration board is the same
PDF  55 Pages
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Fabricante Electrônico  STMICROELECTRONICS [STMicroelectronics]
Página de início  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN3095 Folha de dados(HTML) 29 Page - STMicroelectronics

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AN3095
Schematic description
Doc ID 16555 Rev 3
29/55
Figure 16.
Schematic of the AC voltage measurement circuit
The circuit is supplied by the 5 V bus generated by the multi-output power supply and the
measured voltage is fed through connector J11. The output voltage of this circuit is then
equal to the sum of the measured voltage plus an offset voltage according to the following
equation:
Equation 52
Where Vmeas is the voltage on J11, Vcc is the 5 V supply voltage and Vout is the voltage on
pin 8 of the operational amplifier. The line current conditioning circuit was designed in a
similar way and the electrical scheme is shown in Figure 17:
12
R
/
13
R
11
R
12
R
//
13
R
V
13
R
//
11
R
12
R
13
R
//
11
R
V
V
cc
.
meas
out
+
+
+
=



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