LT1490CS8PBF Linear Technology Corporation, LT1490CS8PBF Datasheet

LT1490CS8PBF

Manufacturer Part Number

LT1490CS8PBF

Description

SOP8

Manufacturer

Linear Technology Corporation

Datasheets

1.LT1490CS8PBF.pdf (12 pages)

2.LT1490CS8PBF.pdf (12 pages)

Specifications of LT1490CS8PBF

Date_code

07+

Current page: 1 of 12
Download datasheet (219Kb)

FEATURES

TYPICAL APPLICATIO

APPLICATIO S

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

Rail-to-Rail Input and Output

Single Supply Input Range: – 0.4V to 44V

Micropower: 50 A/Amplifier Max

MSOP Package

Specified on 3V, 5V and 15V Supplies

High Output Current: 20mA

Output Drives 10,000pF with Output Compensation

Reverse Battery Protection to 18V

No Supply Sequencing Problems

High Voltage Gain: 1500V/mV

High CMRR: 98dB

No Phase Reversal

Gain Bandwidth Product: 200kHz

Battery- or Solar-Powered Systems

Supply Current Sensing

Battery Monitoring

Micropower Active Filters

4mA to 20mA Transmitters

Portable Instrumentation

Sensor Conditioning

CHARGER

VOLTAGE

BATT

LOAD

0.2

BATT

)(R

OUT

)(GAIN)

BATT

R A

= 12V

GAIN

OUT

Battery Monitor

AMPS

–

1/4 LT1491

–

1/4 LT1491

Input and Output Op Amps

2N3904

DESCRIPTIO

The dual LT

single and split supplies with a total voltage of 2V to 44V

drawing only 40 A of quiescent current per amplifier. These

amplifiers are reverse supply protected; they draw no current

for reverse supply up to 18V. The input range of the LT1490/

LT1491 includes both supplies and the output swings to both

supplies. Unlike most micropower op amps, the LT1490/

LT1491 can drive heavy loads; their rail-to-rail outputs drive

20mA. The LT1490/LT1491 are unity-gain stable and drive all

capacitive loads up to 10,000pF when optional 0.22 F and

150 compensation is used.

The LT1490/LT1491 have a unique input stage that oper-

ates and remains high impedance when above the positive

supply. The inputs take 44V both differential and common

mode even when operating on a 3V supply. Built-in resis-

tors protect the inputs for faults below the negative supply

up to 22V. There is no phase reversal of the output for inputs

22V below V

The LT1490 dual op amp is available in the 8-pin MSOP,

SO and PDIP packages. The quad LT1491 is available in

the 14-pin SO and PDIP packages.

For new designs it is recommended that the LT1490A/

LT1491A be used instead of the LT1490/LT1491. See the

LT1490A/LT1491A data sheet for details.

2N3904

S1 = OPEN, GAIN = 1

S1 = CLOSED, GAIN = 10

10k

Micropower Rail-to-Rail

10k

1490 and quad LT1491 op amps operate on all

–

or 44V above V

LOGIC HIGH (5V) = CHARGING

LOGIC LOW (0V) = DISCHARGING

–

1/4 LT1491

–

90.9k

= 5V, 0V

= R

Dual and Quad

1490/91 TA01

LOGIC

OUT

–

, independent of V

LT1490/LT1491

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