LTC6103H 查看數據表（PDF） - Linear Technology

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LTC6103H

Dual High Voltage, High Side Current Sense Amplifi er

Linear Technology 

FEATURES

■ Two Independent Current Sense Amplifiers

■ Wide Supply Range: 4V to 60V, 70V Absolute

Maximum

■ Low Offset Voltage: 450µV Maximum

■ Fast Response: 1µs Response Time

■ Gain Configurable with External Resistors

■ Low Input Bias Current: 170nA Maximum

■ PSRR: 110dB Minimum (6V to 60V)

■ Output Current: 1mA Maximum

■ Low Supply Current: 275µA per Amplifier, VS = 12V

■ Specified for –40°C to 125°C Temperature Range

■ Available in an 8-lead MSOP Package

APPLICATIONS

■ Current Shunt Measurement

■ Battery Monitoring

■ Remote Sensing

■ Power Management

■ High Voltage Level Translator

LTC6103

Dual High Voltage, High Side

Current Sense Amplifier

DESCRIPTION

The LTC®6103 is a versatile, high voltage, high side, dual

current sense amplifier. The two internal amplifiers are

independent except that they share the same V– terminal.

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.

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

All other trademarks are the property of their respective owners.

TYPICAL APPLICATION

Two 16-Bit Current Sense Channels Connected Directly to the LTC2436-1 ADC

VA+

ILOAD –VSENS+E

VB+

+VSENS–E

ILOAD

LOAD

8

+INA

RIN

100Ω

7

–INA

VSA

RIN

100Ω

LOAD

6

5

–INB +INB

–+

VSB

LTC6103 OUTA

1

V– OUTB

42

ROUT

4.99k

ROUT

4.99k

5V 1µF

2

1

6

CH1

7

4

LTC2436-1

5

CH0

13

12

TO µP

11

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

6103 TA01a

Step Response

VSENSE–

∆VSENSE– = 100mV

5.5V

5V

IOUT = 100µA

VOUT

0.5V

0V

IOUT = 0µA

500ns/DIV

TA = 25°C

V+ = 12V

RIN = 100Ω

ROUT = 5k

VSENSE+ = V+

6103 TA01b

6103f

1

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