SENSE AMPLIFIER. Si8540 Datasheet

Si8540 AMPLIFIER. Datasheet pdf. Equivalent

Part Si8540
Description HIGH-SIDE CURRENT SENSE AMPLIFIER
Feature Si8540 HIGH-SIDE CURRENT SENSE AMPLIFIER Features  Complete, unidirectional high-side current se.
Manufacture Silicon Laboratories
Datasheet
Download Si8540 Datasheet



Si8540
Si8540
HIGH-SIDE CURRENT SENSE AMPLIFIER
Features
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
Applications
Battery chargers
Smart battery packs
DC motor control
Backup systems
Current control 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
5-Pin SOT-23
Ordering Information:
See page 12.
Pin Assignments
RG1 1
5 RG2
GND 2
SHDN
34
SOT-23
OUT
VSOURCE
RSENSE
ILOAD Patents pending
RG1
RG2
Rev. 1.2 8/13
Si8540
ROUT
VOUT
Copyright © 2013 by Silicon Laboratories
Si8540



Si8540
Si8540
2 Rev. 1.2





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