LT1787 Linear Technology Corporation, LT1787 Datasheet

LT1787

Manufacturer Part Number

LT1787

Description

Manufacturer

Linear Technology Corporation

Datasheets

1.LT1787.pdf (12 pages)

2.LT1787.pdf (12 pages)

3.LT1787.pdf (16 pages)

Specifications of LT1787

Case

SOP8

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Current page: 1 of 12
Download datasheet (206Kb)

FEATURES

APPLICATIO S

TYPICAL APPLICATIO

LOAD

OUT

12-Bit Dynamic Resolution Unidirectional Output into LTC

Input Offset Voltage: 75 V (Max)

60V Supply Operation (LT1787HV)

12-Bit Dynamic Range

Operating Current: 60 A

User-Selectable External Sense Resistor

Bidirectional High Side Current Sensing

Unidirectional or Bidirectional Output

Input Noise Filtering

Available in 8-Lead SO and MSOP Packages

Battery Monitoring

Power Monitoring

Portable Phones

Cellular Phones

Portable Test/Measurement Systems

Battery-Operated Systems

= V

BIAS

+ (8 • I

I = 100A

FIL

DNC

LOAD

–

LT1787HV

• R

0.0016

SENSE

20k

)

BIAS

FIL

OUT

0.1 F

2.5V TO 60V

15k

LT1634-1.25

+IN

–IN

REF

LTC1286

GND

1 F

CLK

OUT

1286 ADC

TO P

1787 TA01

DESCRIPTIO

The LT

side current sense amplifier. The LT1787 monitors bidi-

rectional currents via the voltage across an external sense

resistor. A current or voltage output depicts the direction

and magnitude of the sense current. The LT1787 delivers

greater than a 12-bit dynamic range with ultralow 40 V

input offset voltage compared to a typical 250mV full-

scale input voltage. A fixed gain of 8 is set by onboard

precision resistors. Input signal filtering is easily imple-

mented with a capacitor between the FIL

The LT1787HV operates from 2.5V to 60V total supply

voltage and the LT1787 operates from 2.5V to 36V total

supply voltage. Both versions have a PSRR in excess of

120dB. The LT1787/LT1787HV draw only 60 A and are

available in 8-lead SO and MSOP packages.

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

Current Sense Amplifiers

1787 is a complete micropower precision high

Precision, High Side

–10

–20

–30

–40

–50

Input Offset Voltage vs Supply Voltage

LT1787/LT1787HV

TOTAL SUPPLY VOLTAGE (V)

–

and FIL

1787 TA01b

pins.

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