LT1990 datasheet(1/16 Pages) LINER

номер детали	LT1990

подробное описание детали	Micropower, Difference Amplifier

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производитель	LINER [Linear Technology]

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LT1990

1

1990fb

■ Battery Cell Voltage Monitoring

■ High Voltage Current Sensing

■ Signal Acquisition in Noisy Environments

■ Input Protection

■ Fault Protected Front Ends

■ Level Sensing

■ Isolation

■ Pin Selectable Gain of 1 or 10

■ High Common Mode Voltage Range:

85V Window (VS = 5V, 0V)

±250V (VS = ±15V)

■ Common Mode Rejection Ratio: 70dB Min

■ Input Protection to

±350V

■ Gain Error: 0.28% Max

■ PSRR: 82dB Min

■ High Input Impedance: 2M

Ω Differential,

500k

Ω Common Mode

■ Micropower: 120

µA Max Supply Current

■ Wide Supply Range: 2.7V to 36V

■ –3dB Bandwidth: 100kHz

■ Rail-to-Rail Output

■ 8-Pin SO Package

±250V Input Range

G = 1, 10, Micropower,

Difference Amplifier

The LT

®1990 is a micropower precision difference ampli-

fier with a very high common mode input voltage range. It

has pin selectable gains of 1 or 10. The LT1990 operates

over a

±250V common mode voltage range on a ±15V

supply. The inputs are fault protected from common

mode voltage transients up to

±350V and differential

voltages up to

±500V.TheLT1990isideallysuitedforboth

high side and low side current or voltage monitoring.

On a single 5V supply, the LT1990 has an adjustable 85V

input range, 70dB min CMRR and draws less than 120

µA

supply current. The rail-to-rail output maximizes the dy-

namic range, especially important for single supplies as

low as 2.7V.

The LT1990 is specified for single 3V, 5V and

±15V

supplies over both commercial and industrial temperature

ranges. The LT1990 is available in the 8-pin SO package.

Full-Bridge Load Current Monitor

RS

+VSOURCE

IL

–12V

≤ VCM ≤ 73V

VOUT = VREF ± (10 • IL • RS)

–

+

40k

100k

900k

1M

900k

10k

VOUT

LT1990

LT6650

GND

IN

OUT

FB

54.9k

20k

1nF

1

µF

VREF = 1.5V

1990 TA01

5V

7

2

3

4

1

8

6

5

+

–

APPLICATIO S

DESCRIPTIO

FEATURES

TYPICAL APPLICATIO

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

All other trademarks are the property of their respective owners.

Аналогичный номер детали - LT1990

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Linear Technology	LT1990	222Kb / 16P	250V Input Range G = 1, 10, Micropower, Difference Amplifier
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