INA281開發(fā)板套件編程器的評估板-運(yùn)算放大器規(guī)格書PDF中文資料

INA281屬于開發(fā)板套件編程器的評估板-運(yùn)算放大器。由德州儀器制造生產(chǎn)的INA281評估板 - 運(yùn)算放大器運(yùn)算放大器評估板是裝有元器件的電路，用于提供特定集成電路或器件的工作實(shí)例。該產(chǎn)品族中的電路板提供了運(yùn)算放大器實(shí)例。每個(gè) IC 的通道類型有單通道、雙通道、三通道、四通道和八通道，放大器類型包括音頻、自動(dòng)歸零、緩沖器、斬波器、電流反饋、電流檢測、差動(dòng)、差分、四通道、儀表、隔離、J-FET、限幅、對數(shù)、功率、可編程增益、采樣保持、跨阻、可變增益、視頻、電壓反饋和零漂移。

1 Features

? Wide common-mode voltage:

– 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:

? 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

? High bandwidth: 1.3 MHz

? Slew rate: 2.5V/μs

? Quiescent current: 1.5 mA

2 Applications

? Active antenna system mMIMO (AAS)

? Macro remote radio unit (RRU)

? 48-V rack server

? 48-V merchant network & server power supply

(PSU)

? Solenoid control

? Valve control

? Telecom equipment

? Power supplies

3 Description

The INA281-Q1 is a high-precision current sense

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-Q1 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).

The INA281-Q1 operates from a single 2.7-V to 20-

V supply, drawing 1.5 mA of supply current. The

INA281-Q1 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 currentsensing

applications.

The INA281-Q1 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.