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LTC6103 Datasheet(PDF) 1 Page - Linear Technology

Part No. LTC6103
Description  Dual High Voltage, High Side Current Sense Amplifier
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Maker  LINER [Linear Technology]
Homepage  http://www.linear.com
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LTC6103 Datasheet(HTML) 1 Page - Linear Technology

 
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LTC6103
1
6103f
TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION
Dual High Voltage, High Side
Current Sense Amplifier
The LTC
®6103 is a versatile, high voltage, high side, dual
current sense amplifier. The two internal amplifiers are
independent except that they share the same Vterminal.
Design flexibility is provided by the excellent device char-
acteristics: 450µV maximum offset, and only 275µA of
current consumption (typical at 12V) for each amplifier.
The LTC6103 operates on supplies from 4V to 60V.
The LTC6103 monitors current via the voltage across an
external sense resistor (shunt resistor). Internal circuitry
converts input voltage to output current, allowing for a
small sense signal on a high common mode voltage to be
translated into a ground referenced signal. Low DC offset al-
lows the use of a small shunt resistor and large gain-setting
resistors. As a result, power loss in the shunt is minimal.
The wide operating supply range and high accuracy make
the LTC6103 ideal for an extensive variety of applications
from automotive to industrial and power management.
The fast response makes the LTC6103 the perfect choice
for load current warnings and shutoff protection control.
With very low supply current, the LTC6103 is suitable for
power sensitive applications.
The LTC6103 is available in an 8-lead MSOP package.
Two 16-Bit Current Sense Channels Connected Directly to the LTC2436-1 ADC
Two Independent Current Sense Amplifiers
Wide Supply Range: 4V to 60V, 70V Absolute
Maximum
Low Offset Voltage: 450µV Maximum
Fast Response: 1µs Response Time
Gain Configurable with External Resistors
Low Input Bias Current: 170nA Maximum
PSRR: 110dB Minimum (6V to 60V)
Output Current: 1mA Maximum
Low Supply Current: 275µA per Amplifier, VS = 12V
Specified for –40°C to 125°C Temperature Range
Available in an 8-lead MSOP Package
Current Shunt Measurement
Battery Monitoring
Remote Sensing
Power Management
High Voltage Level Translator
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
5.5V
5V
0.5V
0V
500ns/DIV
6103 TA01b
TA = 25°C
V
+ = 12V
RIN = 100Ω
ROUT = 5k
VSENSE
+ = V+
VOUT
VSENSE
∆VSENSE
= 100mV
IOUT = 100µA
IOUT = 0µA
Step Response
+
+
8
7
6
5
2
4
1
+INA
OUTA
OUTB
VSB
VSA
LTC6103
6
2
13
12
11
1
1
µF
5V
5
7
4
TO
µP
6103 TA01a
–INA
–INB
RIN
100
RIN
100
VSENSE
VSENSE
++
VA
+
VB
+
+INB
V
ROUT
4.99k
ROUT
4.99k
LOAD
LOAD
ILOAD
ILOAD
LTC2436-1
CH1
CH0
3,8,9,10,14,15,16


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