Datasheet > INA149-EP

INA149-EP

更新时间： 2024-11-03 12:21:35

品牌	Logo	应用领域
德州仪器 - TI		放大器
页数	文件大小	规格书
26页	1813K
描述
HIGH COMMON-MODE VOLTAGE DIFFERENCE AMPLIFIER

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INA149-EP 数据手册

INA149-EP

www.ti.com

SBOS608A –MARCH 2012–REVISED APRIL 2012

HIGH COMMON-MODE VOLTAGE DIFFERENCE AMPLIFIER

FEATURES

•

Common-Mode Voltage Range: ±275 V

Minimum CMRR: 84 dB from –55°C to +125°C

DC Specifications:

SUPPORTS DEFENSE, AEROSPACE,

AND MEDICAL APPLICATIONS

•

Controlled Baseline

One Assembly/Test Site

One Fabrication Site

–

Maximum Offset Voltage: 3500 μV

Maximum Gain Error: 0.047%

Available in Military (–55°C/125°C)

Temperature Range⁽¹⁾

Maximum Gain Nonlinearity: 0.001% FSR at

25°C

•

Extended Product Life Cycle

Extended Product-Change Notification

Product Traceability

•

AC Performance:

–

Bandwidth: 500 kHz

Typical Slew Rate: 5 V/μs

Wide Supply Range: ±2.0 V to ±18 V

120

INA149

Competitor A

–

Maximum Quiescent Current: 1100 μA

110

100

Output Swing on ±15-V Supplies: ±13.5 V

Input Protection:

–

Common-Mode: ±500 V

Differential: ±500 V

APPLICATIONS

•

High-Voltage Current Sensing

Battery Cell Voltage Monitoring

Power-Supply Current Monitoring

Motor Controls

100

10k

100k

Frequency (Hz)

Replacement for Isolation Circuits

(1) Additional temperature ranges available - contact factory

DESCRIPTION

The INA149 is a precision unity-gain difference amplifier with a very high input common-mode voltage range. It is

a single, monolithic device that consists of a precision op amp and an integrated thin-film resistor network. The

INA149 can accurately measure small differential voltages in the presence of common-mode signals up to

±275 V. The INA149 inputs are protected from momentary common-mode or differential overloads of up to

500 V.

In many applications, where galvanic isolation in not required, the INA149 can replace isolation amplifiers. This

ability can eliminate costly isolated input side power supplies and the associated ripple, noise, and quiescent

current. The excellent 0.0005% nonlinearity and 500-kHz bandwidth of the INA149 are superior to those of

conventional isolation amplifiers.

The INA149 is pin-compatible with the INA117 and INA148 type high common-mode voltage amplifiers and

offers improved performance over both devices. The INA149 is available in the SOIC-8 package with operation

specified over the military temperature range of –55°C to +125°C.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

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