Overview
The INA250A3PW, produced by Texas Instruments, is a 36-V, bidirectional, precision current sense amplifier that integrates a precision internal shunt resistor. This device is designed for high-accuracy current measurements across a wide range of common-mode voltages from 0 V to 36 V. The INA250A3PW features a 2-mΩ shunt resistor with a tolerance of 0.1% (max) and can handle continuous currents up to 15 A from –40°C to 85°C. It operates from a single 2.7-V to 36-V supply and draws a maximum of 300 µA of supply current. The device is available in a TSSOP-16 package and is fully specified over the extended operating temperature range of –40°C to 125°C.
Key Specifications
| Parameter | Min | Max | Unit | |
|---|---|---|---|---|
| Shunt Resistance (RSHUNT) | 1.998 | 2 | 2.002 | mΩ |
| Shunt Resistor Tolerance | 0.1% | |||
| Maximum Continuous Current | 15 A | |||
| Operating Supply Voltage (VS) | 2.7 | 36 | V | |
| Quiescent Current (IQ) | 200 | 300 | µA | |
| Operating Temperature Range (TA) | –40 | 125 | °C | |
| Gain (INA250A3) | 800 mV/A | |||
| Common-Mode Input Range | –0.1 | 36 | V | |
| Output Impedance | 1.5 Ω | |||
| Bandwidth (INA250A3, CL = 10 pF) | 35 kHz |
Key Features
- Precision Integrated Shunt Resistor: 2 mΩ with 0.1% (max) tolerance and a temperature coefficient of 10 ppm/°C.
- High Accuracy: Gain error (shunt and amplifier) of 0.3% (max) and offset current of 50 mA (max) for INA250A2.
- Multiple Gain Versions: Available in four output voltage scales: 200 mV/A, 500 mV/A, 800 mV/A, and 2 V/A.
- Wide Common-Mode Range: Operates from –0.1 V to 36 V.
- Low Power Consumption: Draws a maximum of 300 µA of supply current.
- High Temperature Stability: Specified over the extended operating temperature range of –40°C to 125°C).
Applications
- Test Equipment: For precise current measurements in various test setups.
- Power Supplies: To monitor and control current in power supply systems).
- Servers and Telecom Equipment: For current monitoring in high-reliability systems).
- Automotive Systems: For monitoring battery and system currents in automotive applications).
- Solar Inverters and Power Management: To ensure accurate current measurements in renewable energy and power management systems).
Q & A
- What is the shunt resistance of the INA250A3PW?
The shunt resistance is 2 mΩ with a tolerance of 0.1% (max)).
- What is the maximum continuous current the INA250A3PW can handle?
The device can handle continuous currents up to 15 A from –40°C to 85°C).
- What are the available gain versions for the INA250?
The INA250 is available in four output voltage scales: 200 mV/A, 500 mV/A, 800 mV/A, and 2 V/A).
- What is the operating supply voltage range for the INA250A3PW?
The device operates from a single 2.7-V to 36-V supply).
- What is the common-mode input range of the INA250A3PW?
The common-mode input range is from –0.1 V to 36 V).
- What is the quiescent current of the INA250A3PW?
The quiescent current is a maximum of 300 µA).
- What is the operating temperature range for the INA250A3PW?
The device is specified over the extended operating temperature range of –40°C to 125°C).
- What package type is the INA250A3PW available in?
The device is available in a TSSOP-16 package).
- What are some typical applications for the INA250A3PW?
Typical applications include test equipment, power supplies, servers, telecom equipment, automotive systems, and solar inverters).
- How does the INA250A3PW handle short-circuit durations?
The device can withstand brief current excursions above the continuous handling limit without sustaining damage to the current-sensing resistor or amplifier).
