Datasheet > LT1491A

LT1491A

更新时间： 2023-12-20 18:44:05

品牌	Logo	应用领域
亚德诺 - ADI		放大器运算放大器
页数	文件大小	规格书
18页	228K
描述
四通道、Over-The-Top、微功率、轨至轨输入和输出运算放大器

阅读下载

获取价格

数据手册

如果您发现信息不准确，欢迎纠错

LT1491A 数据手册

LT1490A/LT1491A

Dual/Quad Over-The-Top

Micropower Rail-to-Rail

Input and Output Op Amps

FEATURES

DESCRIPTION

The LT^®1490A/LT1491A are dual and quad op amps with a

lowinputoffsetvoltageof500μVmax.TheLT1490A/LT1491A

operate on all single and split supplies with a total voltage of

2V to 44V, drawing only 40μA of quiescent current per ampli-

fier. Theseamplifiersarereversesupplyprotected;theydraw

virtually no current for reverse supply up to 18V. The input

range of the LT1490A/LT1491A includes both supplies and

the output swings to both supplies. Unlike most micropower

op amps, the LT1490A/LT1491A can drive heavy loads; their

rail-to-rail outputs drive 20mA. The LT1490A/LT1491A are

unity-gainstableanddriveallcapacitiveloadsupto10,000pF

when optional 0.22μF and 150Ω compensation is used.

Low Input Offset Voltage: 500μV Max

–

Output Swings to 10mV Max from V

Rail-to-Rail Input and Output

Micropower: 50μA/Amplifier Max

Over-The-Top^®Input Common Mode Range Extends

–

44V Above V , Independent of V

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

Tiny 3mm × 3mm × 0.8mm DFN Package

The LT1490A/LT1491A 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 resistors

protect the inputs for faults below the negative supply up to

15V. There is no phase reversal of the output for inputs 15V

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

APPLICATIONS

Battery- or Solar-Powered Systems

Portable Instrumentation

Sensor Conditioning

TheLT1490Adualopampisavailableinthe8-pinMSOP,PDIP

and SO packages. For space limited applications LT1490A is

available in a 3mm × 3mm × 0.8mm, dual fine pitch leadless

package (DFN). The quad LT1491A is available in the 14-pin

SO, PDIP and 5mm × 3mm × 0.8mm DFN packages.

Supply Current Sensing

Battery Monitoring

Micropower Active Filters

4mA to 20mA Transmitters

L, LT, LTC, LTM, Over-The-Top, Linear Technology and the Linear logo are registered

trademarks of Linear Technology Corporation. All other trademarks are the property of their

respective owners. Protected by U.S. Patents including 5825228.

TYPICAL APPLICATION

Battery Monitor

0.2Ω

2N3904

CHARGER

VOLTAGE

A´

1/4 LT1491A

BATT

–

1/4 LT1491A

LOGIC

–

2N3904

LOGIC HIGH (5V) = CHARGING

LOGIC LOW (0V) = DISCHARGING

B´

1/4 LT1491A

–

LOAD

1/4 LT1491A

OUT

10k

= 12V

BATT

–

10k

90.9k

1490A TA01

OUT

S1 = OPEN, GAIN = 1

S1 = CLOSED, GAIN = 10

= R

AMPS

BATT

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

= 5V, 0V

14901afd

12 3 4 5 6 7...18

下载PDF

与LT1491A相关器件

型号	品牌	描述	获取价格	数据表
LT1491A_15	Linear	Dual/Quad Over-The-Top Micropower Rail-to-Rail Input and Output Op Amps	获取价格
LT1491ACDHC	Linear	Dual/Quad Over-The-Top Micropower Rail-to-Rail Input and Output Op Amps	获取价格
LT1491ACDHC#PBF	Linear	LT1491A - Quad Over-The-Top Micropower Rail-to-Rail Input and Output Op Amps; Package: DFN	获取价格
LT1491ACDHC#TR	Linear	LT1491A - Quad Over-The-Top Micropower Rail-to-Rail Input and Output Op Amps; Package: DFN	获取价格
LT1491ACN	Linear	Dual/Quad Over-The-Top Micropower Rail-to-Rail Input and Output Op Amps	获取价格
LT1491ACN#PBF	Linear	LT1491A - Quad Over-The-Top Micropower Rail-to-Rail Input and Output Op Amps; Package: PDI	获取价格

产品中心

服务支持

精选活动

关于我们

帮助中心

LT1491A

LT1491A 数据手册

与LT1491A相关器件

与LT1491A相关文章

您还可以找

产品中心

服务支持

精选活动

关于我们

帮助中心

LT1491A

LT1491A 数据手册

与LT1491A相关器件

与LT1491A相关文章

您还可以找

您在本页遇到什么问题？