LTC6103

1

6103f

TYPICAL APPLICATION

FEATURES

APPLICATIONS

DESCRIPTION

Dual High Voltage, High Side

Current Sense Amplifier

The LTC

current sense amplifier. The two internal amplifiers are

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

Maximum

, 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

V

–

Step Response

+

–

+

–

8

7

6

5

2

4

1

+INA

OUTA

OUTB

LTC6103

6

2

13

12

11

1

1

µF

5V

5

7

4

TO

µP

6103 TA01a

–INA

–INB

100

Ω

100

Ω

++

–

–

+

+

+INB

4.99k

4.99k

LOAD

LOAD

LTC2436-1

CH1

CH0

3,8,9,10,14,15,16