LTC6101_15 Datasheet, PDF (1/22 Pages) Linear Technology – High Voltage, High-Side Current Sense Amplifi er in SOT-23

FEATURES
n _{Supply Range:}
5V to 100V, 105V Absolute Maximum (LTC6101HV)
4V to 60V, 70V Absolute Maximum (LTC6101)
n _{Low Offset Voltage: 300μV Max}
n _{Fast Response: 1μs Response Time (0V to 2.5V on}
a 5V Output Step)
n _{Gain Configurable with 2 Resistors}
n _{Low Input Bias Current: 170nA Max}
n _{PSRR: 118dB Min}
n _{Output Current: 1mA Max}
n _{Low Supply Current: 250μA, VS = 12V}
n _{Specified Temperature Range: –40°C to 125°C}
n _{Operating Temperature Range: –55°C to 125°C}
n _{Low Profile (1mm) SOT-23 (ThinSOT™) Package}
APPLICATIONS
n _{Current Shunt Measurement}
n _{Battery Monitoring}
n _{Remote Sensing}
n _{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.
LTC6101/LTC6101HV
High Voltage,
High-Side Current Sense
Amplifier in SOT-23
DESCRIPTION
The LTC^®6101/LTC6101HV are versatile, high voltage, high
side current sense amplifiers. Design flexibility is provided
by the excellent device characteristics; 300μV Max offset
and only 375μA (typical at 60V) of current consumption.
The LTC6101 operates on supplies from 4V to 60V and
LTC6101HV operates on supplies from 5V to 100V.
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.
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.
The LTC6101 is available in 5-lead SOT-23 and 8-lead
MSOP packages.
TYPICAL APPLICATION
16-Bit Resolution Unidirectional Output into LTC2433 ADC
I_LOAD
V_SENSE
+IN
L
O
V^–
A
D
R_IN
100Ω
–IN
V⁺
5V TO 105V
5V
1μF
LTC6101HV
OUT ^VOUT
R_OUT
4.99k
LTC2433-1
TO μP
V_OUT
=
R_OUT
R_IN
•
V_SENSE
=
49.9V_SENSE
6101 TA01
Step Response
V_SENSE^–
ΔV_SENSE^– = 100mV
5.5V
5V
V_OUT
0.5V
0V
T_A = 25°C
V⁺ = 12V
R_IN = 100
R_OUT = 5k
V_SENSE⁺ = V⁺
I_OUT = 100μA
I_OUT = 0
500ns/DIV
6101 TA01b
6101fh
1