1

LT6100

6100f

4

FIL

A4

+

3m

Ω

8

–

1

3V

CONFIGURED FOR GAIN = 25V/V

4.4V TO 48V

SUPPLY

A2

7

26

LT6100

3

5

6100 TA01a

220pF

LOAD

Precision, Gain Selectable

High Side Current Sense

Amplifier

µA

°C to 125°C Operating Temperature Range

Input Offset Voltage

FEATURES

DESCRIPTIO

APPLICATIO S

TYPICAL APPLICATIO

–1.5

–0.5

0.5

1.5

–1.0

0

1.0

10

20

30

40

6100 TA01b

50

5

015

25

35

45

, LTC and LT are registered trademarks of Linear Technology Corporation.

All other trademarks are the property of their respective owners.

The LT

side current sense amplifier. The LT6100 monitors unidi-

rectional currents via the voltage across an external sense

resistor. Fixed gains of 10, 12.5, 20, 25, 40, 50V/V are

obtained by simply strapping or floating two gain select

pins. Gain accuracy is better than 0.5% for all gains.

The LT6100 sense inputs have a voltage range that ex-

tends from 4.1V to 48V, and can withstand a differential

voltage of the full supply. This makes it possible to monitor

the voltage across a MOSFET switch or a fuse. The part can

also withstand a reverse battery condition on the inputs.

Input offset is a low 300

µV. CMRR and PSRR are in excess

of 105dB, resulting in a wide dynamic range. A filter pin is

provided to easily implement signal filtering with a single

capacitor.

The LT6100 has a separate supply input, which operates

from 2.7V to 36V and draws only 60

powered down, the sense pins are biased off. This pre-

vents loading of the monitored circuit, irrespective of the

sense voltage. The LT6100 is available in an 8-lead DFN

and MSOP package.

0A to 33A High Side Current Monitor with 12kHz Frequency Rolloff