LT6107_15 Datasheet, PDF (1/12 Pages) Linear Technology – High Temperature High Side Current Sense Amp in SOT-23

LT6107
High Temperature High Side
Current Sense Amp in SOT-23
FEATURES
■ _{Fully Tested at –55°C, 25°C and 150°C}
■ _{Gain Configurable with Two Resistors}
■ _{Low Offset Voltage: 250μV Maximum}
■ _{Output Current: 1mA Maximum}
■ _{Supply Range: 2.7V to 36V, 44V Absolute Maximum}
■ _{Low Input Bias Current: 40nA Maximum}
■ _{PSRR: 106dB Minimum}
■ _{Low Supply Current: 65μA Typical, V}⁺ _{= 12V}
■ _{Low Profile (1mm) ThinSOT}^TM _Package
APPLICATIONS
■ _{Current Shunt Measurement}
■ _{Battery Monitoring}
■ _{Power Management}
■ _{Motor Control}
■ _{Lamp Monitoring}
■ _{Overcurrent and Fault Detection}
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the
property of their respective owners.
DESCRIPTION
The LT^®6107 is a versatile high side current sense ampli-
fier designed for operation over a wide temperature range.
Design flexibility is provided by the excellent device char-
acteristics: 250μV maximum offset and 40nA maximum
input bias current. Gain for each device is set by two re-
sistors and allows for accuracy better than 1%.
The LT6107 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. The low DC
offset allows for monitoring very small sense voltages. As
a result, a small valued shunt resistor can be used, which
minimizes the power loss in the shunt.
The wide 2.7V to 44V input voltage range, high accuracy
and wide operating temperature range make the LT6107
ideal for automotive, industrial and power management
applications. The very low power supply current of the
LT6107 also makes it suitable for low power and battery
operated applications. For applications not requiring the
wide temperature range, see the LT6106.
TYPICAL APPLICATION
3V to 36V, 5A Current Sense with A_V = 10
3V TO 36V
0.02Ω
100Ω
+IN
–IN
+–
LOAD
V^–
V⁺
LT6107
OUT
V_OUT
200mV/A
1k
6107 TA01a
Measurement Accuracy vs Load Current
0.6
0.4
0.2
0
TYPICAL PART, T_A = 25°C
–0.2
–0.4
–0.6
–0.8 5A FULL SCALE
R_SENSE = 0.02
–1.0 A_V = 10
R_IN = 100
RV_+OU=T3=V1k
–1.2
0
1
2
3
LOAD CURRENT (A)
4
5
6107 TA01b
6107fb
1