Overview
The INA250A4PWR, produced by Texas Instruments, is a 36-V, bidirectional, precision current sense amplifier integrated with a precision shunt resistor. This device is designed to enable high-accuracy current measurements across a wide range of common-mode voltages from 0 V to 36 V. It features a zero-drift topology, ensuring ultra-low temperature drift and high precision measurements. The INA250A4PWR is part of the INA250 family, which includes multiple gain versions to optimize the full-scale output voltage based on the target current range of the application.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Shunt Resistor | 2 mΩ | |
| Shunt Resistor Tolerance | 0.1% (Max) | |
| Maximum Continuous Current | ±15 A (–40°C to 85°C), ±10 A (–40°C to 125°C) | |
| Gain | 2 V/A | |
| Common-Mode Input Range | –0.1 V to 36 V | |
| Operating Supply Voltage | 2.7 V to 36 V | |
| Operating Temperature Range | –40°C to 125°C | |
| Quiescent Current | 200 μA to 300 μA | |
| Package Type | TSSOP-16 | |
| Package Size | 5.00 mm × 6.40 mm |
Key Features
- Precision integrated shunt resistor with 0.1% tolerance and 10 ppm/°C temperature coefficient.
- High accuracy with gain error and offset current minimized (0.3% max gain error, 50 mA max offset current for INA250A2).
- Four available gain versions: 200 mV/A, 500 mV/A, 800 mV/A, and 2 V/A.
- Wide common-mode range from –0.1 V to 36 V.
- Bidirectional current sensing capability.
- Low power consumption with a quiescent current of 200 μA to 300 μA.
- High common-mode rejection ratio (CMRR) and power-supply rejection ratio (PSRR).
Applications
- Test Equipment
- Power Supplies
- Servers
- Telecom Equipment
- Automotive Systems
- Solar Inverters
- Power Management Systems
Q & A
- What is the primary function of the INA250A4PWR?
The INA250A4PWR is a precision current sense amplifier designed to measure current with high accuracy across a wide range of common-mode voltages.
- What is the shunt resistor value and tolerance of the INA250A4PWR?
The shunt resistor value is 2 mΩ with a tolerance of 0.1% (Max).
- What are the available gain versions for the INA250 family?
The available gain versions are 200 mV/A, 500 mV/A, 800 mV/A, and 2 V/A.
- What is the common-mode input range of the INA250A4PWR?
The common-mode input range is from –0.1 V to 36 V.
- What is the operating temperature range of the INA250A4PWR?
The operating temperature range is from –40°C to 125°C.
- How much quiescent current does the INA250A4PWR consume?
The quiescent current is between 200 μA and 300 μA.
- What is the package type and size of the INA250A4PWR?
The package type is TSSOP-16, and the package size is 5.00 mm × 6.40 mm.
- What are some typical applications for the INA250A4PWR?
Typical applications include test equipment, power supplies, servers, telecom equipment, automotive systems, solar inverters, and power management systems.
- How does the INA250A4PWR handle high currents and temperatures?
The device can handle continuous currents up to 15 A at temperatures up to 85°C and up to 10 A at 125°C, with proper heat dissipation and PCB layout considerations.
- What is the significance of the zero-drift topology in the INA250A4PWR?
The zero-drift topology ensures ultra-low temperature drift, providing high precision measurements across the operating temperature range.
