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TSC2012H Datasheet(PDF) 24 Page - STMicroelectronics

No. de pieza TSC2012H
Descripción Electrónicos  High temperature, high voltage, precision, bidirectional current sense amplifiers
PDF  49 Pages
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

TSC2012H Datasheet(HTML) 24 Page - STMicroelectronics

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Figure 55. Input bias current vs. common mode voltage Vcc = 5 V
-20
-10
0
10
20
30
40
50
60
70
-600
-500
-400
-300
-200
-100
0
100
200
300
400
500
600
Iibp
Vref=Vcc/2
Vsense=0V
Vcc=5V
Iibn
Vicm (V)
•
Gnd < Vicm < Vcc
In this manner, the TSC2011H is only powered by the power supply Vcc, and the iib currents are very close to 0
µA and do not have any impact on the current measurement.
•
-20 V < Vicm < Gnd
The TSC2011H is fully functional in this range of common mode voltage and has also been characterized.
As the high positive common mode voltage, in this specific range, the TSC2011H is also powered by the input,
see Figure 3.
Figure 56. Power supply when Vicm < Gnd
Most of the current is still due to the pin In+ as we can see on the iibp curve of Figure 7. The current is about - 300
µA, some of it being Vicm / (R4 + R1) and some other supplies the circuit, roughly 250 µA. A small part of the
current, coming from the common mode rail, is also due to the input In– in order to power the TSC2011H, in a
range of -100 µV.
TSC2010H, TSC2011H, TSC2012H
Application information
DS13791 - Rev 2
page 24/49



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