Datasheet > INA281A2IDBVT

INA281A2IDBVT

更新时间： 2024-11-22 02:46:31

品牌	Logo	应用领域
德州仪器 - TI		/
页数	文件大小	规格书
28页	1478K
描述
INA281, â4-V to 110-V, 1.3-MHz Current-Sense Amplifier

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INA281

SBOSA29 –JUNE 2020

INA281, –4-V to 110-V, 1.3-MHz Current-Sense Amplifier

1 Features

3 Description

The INA281 is

a high-precision current sense

•

Wide common-mode voltage:

amplifier that can measure voltage drops across

shunt resistors over a wide common-mode range

from –4 V to 110 V. The negative common-mode

voltage allows the device to operate below ground,

thus accommodating precise measurement of

recirculating currents in half-bridge applications. The

combination of a low offset voltage, small gain error

and high DC CMRR enables highly accurate current

measurement. The INA281 is not only designed for

DC current measurement, but also for high-speed

applications (like fast overcurrent protection, for

example) with a high bandwidth of 1.3 MHz and an

65-dB AC CMRR (at 50 kHz).

–

Operational voltage: −4 V to +110 V

Survival voltage: −20 V to +120 V

Excellent CMRR:

–

120-dB DC CMRR

65-dB AC CMRR at 50 kHz

Accuracy:

–

Gain:

–

Gain error: ±0.5% (maximum)

Gain drift: ±20 ppm/°C (maximum)

–

Offset:

The INA281 operates from a single 2.7-V to 20-V

supply, drawing 1.5 mA of supply current. The

INA281 is available with five gain options: 20 V/V, 50

V/V, 100 V/V, 200 V/V, and 500 V/V. These gain

options address wide dynamic range for current-

sensing applications.

–

Offset voltage: ±55 µV (typical)

Offset drift: ±0.1 µV/°C (typical)

•

Available gains:

–

INA281A1, INA281B1 : 20 V/V

INA281A2, INA281B2 : 50 V/V

INA281A3, INA281B3 : 100 V/V

INA281A4, INA281B4 : 200 V/V

INA281A5, INA281B5 : 500 V/V

The INA281 is specified over an operating

temperature range of −40 °C to +125 °C and is

offered in a space-saving SOT-23 package with two

pin-out variants.

•

High bandwidth: 1.3 MHz

Slew rate: 2.5V/µs

Device Information⁽¹⁾

PART NUMBER

INA281

PACKAGE

BODY SIZE (NOM)

Quiescent current: 1.5 mA

SOT-23 (5)

2.90 mm × 1.60 mm

2 Applications

(1) For all available packages, see the package option addendum

at the end of the data sheet.

•

Active antenna system mMIMO (AAS)

Macro remote radio unit (RRU)

48-V rack server

Functional Block Diagram

V_S

V_CM

48-V merchant network & server power supply

(PSU)

I_SENSE

•

Solenoid control

Valve control

IN+

Current

R_SENSE

Bias

Feedback

Telecom equipment

Power supplies

OUT

INœ

Buffer

Load

GND

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

12 3 4 5 6 7...28

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与INA281A2IDBVT相关器件

型号	品牌	获取价格	描述	数据表
INA281A2QDBVRQ1	TI	获取价格	INA281-Q1 AEC-Q100, â4-V to 110-V, 1.3-MHz
INA281A3IDBVR	TI	获取价格	INA281, â4-V to 110-V, 1.3-MHz Current-Sens
INA281A3IDBVT	TI	获取价格	INA281, â4-V to 110-V, 1.3-MHz Current-Sens
INA281A3QDBVRQ1	TI	获取价格	INA281-Q1 AEC-Q100, â4-V to 110-V, 1.3-MHz
INA281A4IDBVR	TI	获取价格	INA281, â4-V to 110-V, 1.3-MHz Current-Sens
INA281A4IDBVT	TI	获取价格	INA281, â4-V to 110-V, 1.3-MHz Current-Sens
INA281A4QDBVRQ1	TI	获取价格	INA281-Q1 AEC-Q100, â4-V to 110-V, 1.3-MHz
INA281A5IDBVR	TI	获取价格	INA281, â4-V to 110-V, 1.3-MHz Current-Sens
INA281A5IDBVT	TI	获取价格	INA281, â4-V to 110-V, 1.3-MHz Current-Sens
INA281A5QDBVRQ1	TI	获取价格	INA281-Q1 AEC-Q100, â4-V to 110-V, 1.3-MHz

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