LTC6101/LTC6101HV
High Voltage,
High-Side Current Sense
Amplifier in SOT-23
FEATURES
DESCRIPTION
TheLTC®6101/LTC6101HVareversatile,highvoltage,high
sidecurrentsenseamplifiers.Designflexibilityisprovided
by the excellent device characteristics; 300ꢀV Max offset
and only 375ꢀA (typical at 60V) of current consumption.
The LTC6101 operates on supplies from 4V to 60V and
LTC6101HV operates on supplies from 5V to 100V.
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Supply Range:
5V to 100V, 105V Absolute Maximum (LTC6101HV)
4V to 60V, 70V Absolute Maximum (LTC6101)
Low Offset Voltage: 300μV Max
Fast Response: 1μs Response Time (0V to 2.5V on
a 5V Output Step)
Gain Configurable with 2 Resistors
Low Input Bias Current: 170nA Max
PSRR: 118dB Min
Output Current: 1mA Max
Low Supply Current: 250ꢀA, V = 12V
Specified Temperature Range: –40°C to 125°C
Operating Temperature Range: –55°C to 125°C
Low Profile (1mm) SOT-23 (ThinSOT™) Package
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The LTC6101 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 allows the use of a small shunt resistor and large
gain-setting resistors. As a result, power loss in the shunt
is reduced.
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The wide operating supply range and high accuracy make
the LTC6101 ideal for a large array of applications from
automotive to industrial and power management. A maxi-
mum input sense voltage of 500mV allows a wide range
of currents to be monitored. The fast response makes the
LTC6101 the perfect choice for load current warnings and
shutoff protection control. With very low supply current,
the LTC6101 is suitable for power sensitive applications.
APPLICATIONS
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Current Shunt Measurement
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Battery Monitoring
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Remote Sensing
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Power Management
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property
of their respective owners.
The LTC6101 is available in 5-lead SOT-23 and 8-lead
MSOP packages.
TYPICAL APPLICATION
16-Bit Resolution Unidirectional Output into LTC2433 ADC
Step Response
I
V
LOAD
SENSE
+
–
–
V
SENSE
R
IN
100Ω
5V TO 105V
ΔV
SENSE
– = 100mV
+IN
–IN
5.5V
5V
L
O
A
D
–
+
+
–
V
V
T
= 25°C
+ = 12V
A
V
1μF
5V
R
R
V
= 100
= 5k
IN
OUT
V
OUT
+ = V+
V
OUT
SENSE
OUT
LTC6101HV
I
= 100μA
= 0
OUT
LTC2433-1
TO μP
0.5V
0V
R
OUT
I
OUT
4.99k
500ns/DIV
6101 TA01
6101 TA01b
R
R
OUT
V
OUT
=
• V
= 49.9V
SENSE SENSE
IN
6101fh
1