LT1491AIS#TR

更新时间： 2024-02-26 18:37:40

品牌	Logo	应用领域
凌特 - Linear		运算放大器
页数	文件大小	规格书
12页	315K
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中文翻译

获取价格

数据手册

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LT1491AIS#TR 数据手册

LT1490/LT1491

Dual and Quad

Micropower Rail-to-Rail

Input and Output Op Amps

FEATURES

DESCRIPTION

The dual LT^®1490 and quad LT1491 op amps operate on all

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

drawing only 40µA of quiescent current per amplifier. These

amplifiersarereversesupplyprotected;theydrawnocurrent

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

LT1491includesbothsuppliesandtheoutputswingstoboth

supplies. Unlike most micropower op amps, the LT1490/

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

20mA.TheLT1490/LT1491areunity-gainstableanddriveall

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

150Ω compensation is used.

■

Rail-to-Rail Input and Output

■

Single Supply Input Range: –0.4V to 44V

■

Micropower: 50µA/Amplifier Max

■

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

■

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

upto22V.Thereisnophasereversaloftheoutputforinputs

22V below V^–or 44V above V^–, independent of V⁺.

APPLICATIONS

■

Battery- or Solar-Powered Systems

Portable Instrumentation

Sensor Conditioning

■

Supply Current Sensing

■

The LT1490 dual op amp is available in the 8-pin SO and

PDIPpackages. ThequadLT1491isavailableinthe14-pin

Battery Monitoring

Micropower Active Filters

4mA to 20mA Transmitters

■

SO and PDIP packages.

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

TYPICAL APPLICATION

Battery Monitor

0.2Ω

2N3904

CHARGER

VOLTAGE

BATT

–

1/4 LT1491

LOGIC

–

1/4 LT1491

2N3904

LOGIC HIGH (5V) = CHARGING

LOGIC LOW (0V) = DISCHARGING

1/4 LT1491

–

LOAD

1/4 LT1491

OUT

10k

= 12V

BATT

–

10k

90.9k

OUT

S1 = OPEN, GAIN = 1

S1 = CLOSED, GAIN = 10

= R

AMPS

BATT

1490/91 TA01

(R )(R /R )(GAIN) GAIN

= 5V, 0V

12 3 4 5 6 7...12

中文翻译

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与LT1491AIS#TR相关器件

型号	品牌	获取价格	描述	数据表
LT1491AIS#TRPBF	Linear	获取价格	暂无描述
LT1491CN	Linear	获取价格	Dual and Quad Micropower Rail-to-Rail Input and Output Op Amps
LT1491CS	Linear	获取价格	Dual and Quad Micropower Rail-to-Rail Input and Output Op Amps
LT1491CS#TR	Linear	获取价格	LT1491 - Dual and Quad Micropower Rail-to-Rail Input and Output Op Amps; Package: SO; Pins
LT1491IN	ETC	获取价格	Voltage-Feedback Operational Amplifier
LT1491IS	ETC	获取价格	Voltage-Feedback Operational Amplifier
LT1491IS#TR	Linear	获取价格	LT1491 - Dual and Quad Micropower Rail-to-Rail Input and Output Op Amps; Package: SO; Pins
LT1491IS#TRPBF	Linear	获取价格	LT1491 - Dual and Quad Micropower Rail-to-Rail Input and Output Op Amps; Package: SO; Pins
LT1492	Linear	获取价格	5MHz, 3V/us, Low Power Single Supply, Dual and Quad Precision Op Amps
LT1492	ADI	获取价格	5MHz、3V/μs、低功率、单电源、双通道精准型运算放大器

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