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SI8540 Datasheet(PDF) 1 Page - Silicon Laboratories

No. de pieza SI8540
Descripción Electrónicos  HIGH-SIDE CURRENT SENSE AMPLIFIER
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Fabricante Electrónico  SILABS [Silicon Laboratories]
Página de inicio  http://www.silabs.com
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SI8540 Datasheet(HTML) 1 Page - Silicon Laboratories

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Rev. 1.2 8/13
Copyright © 2013 by Silicon Laboratories
Si8540
Si8540
HIGH-SIDE CURRENT SENSE AMPLIFIER
Features
Applications
Description
The Si8540 is a unidirectional, 36 V (max), high-side current sense
amplifier for use in applications requiring current monitoring and/or
control. This device draws bias current from the high-side line to which it
is attached, eliminating the need for an external supply. It measures
current from 0.1 to 10 A by sensing the voltage across an external sense
resistor (or PCB trace) from dc to 20 kHz and can achieve measurement
accuracies of 0.2% (typical) at full load. The device output is a current
signal proportional to measured current and is easily converted to a
scaled voltage using a single external resistor. The Si8540 is available in
compact SOT-23 package.
Functional Block Diagram
Complete, unidirectional high-side
current sense capability
0.2% full-scale accuracy
+5 to +36 V supply operation
85 dB power supply rejection
90 µA max supply current
9 µA shutdown current
Operating Temperature Range:
–40 to +85 °C
5-pin SOT-23 package
RoHS-compliant
Battery chargers
Smart battery packs
DC motor control
Backup systems
Current control applications
Si8540
ROUT
VSOURCE
RSENSE
RG2
RG1
VOUT
ILOAD
Patents pending
Ordering Information:
See page 12.
Pin Assignments
5-Pin SOT-23
SOT-23
1
5
4
3
2
RG1
SHDN
GND
RG2
OUT


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