INA250A2中文资料德州仪器数据手册PDF规格书

1 Features

• Precision Integrated Shunt Resistor:

– Shunt Resistor: 2 mΩ

– Shunt Resistor Tolerance: 0.1% (Max)

– 15 A Continuous from –40°C to 85°C

– 0°C to 125°C Temperature Coefficient:

10 ppm/°C

• High Accuracy:

– Gain Error (Shunt and Amplifier): 0.3% (Max)

– Offset Current: 50 mA (Max, INA250A2)

• Four Available Gains:

– INA250A1: 200 mV/A

– INA250A2: 500 mV/A

– INA250A3: 800 mV/A

– INA250A4: 2 V/A

• Wide Common-Mode Range: –0.1 V to 36 V

• Specified Operating Temperature: –40°C to 125°C

2 Applications

• Test Equipment

• Power Supplies

• Servers

• Telecom Equipment

• Automotive

• Solar Inverters

• Power Management

3 Description

The INA250 is a voltage-output, current-sensing

amplifier family that integrates an internal

shunt resistor to enable high-accuracy current

measurements at common-mode voltages that can

vary from 0 V to 36 V, independent of the

supply voltage. The device is a bidirectional, lowor

high-side current-shunt monitor that allows an

external reference to be used to measure current

flowing in both directions through the internal currentsensing

resistor sensor. The integration of the

precision current-sensing resistor provides calibration

equivalent measurement accuracy with ultra-low

temperature drift performance and ensures an

optimized Kelvin layout for the sensing resistor is

always obtained.

The INA250 family is available in four output voltage

scales: 200 mV/A, 500 mV/A, 800 mV/A, and 2 V/A.

This device is fully tested and specified for continuous

currents up to 10 amps at the maximum temperature

of 125°C. The INA250 operates from a single 2.7-V

to 36-V supply and draws a maximum of 300 μA of

supply current. All INA250 gain versions are specified

over the extended operating temperature range (–

40°C to 125°C), and are available in a TSSOP-16

package.