INA2133U/2K5

The INA2133U/2K5 is a precision current sense amplifier manufactured by Texas Instruments. This device is designed to provide accurate current measurements in a variety of applications, including battery management systems, motor control, and power monitoring.

Key Features:

1. Current Sensing: The INA2133U is optimized for low-side current sensing, allowing it to measure the current flowing through a load by being placed between the load and ground. This configuration is particularly useful in applications where high-side sensing is impractical.

2. Gain Configuration: The amplifier has a fixed gain of 100 V/V, which means it amplifies the voltage drop across a shunt resistor by a factor of 100. This high gain allows for precise measurements of small voltage drops, which is essential for accurate current sensing.

3. Input Voltage Range: The device can operate with a common-mode input voltage range that extends from -0.3V to 26V, making it suitable for a wide range of applications. This feature allows it to handle various input conditions without distortion or damage.

4. Low Offset Voltage: The INA2133U boasts a low input offset voltage, typically around 50 µV, which contributes to its high accuracy in current measurement. This low offset is crucial for applications requiring precise current monitoring.

5. Supply Voltage: The amplifier operates on a single supply voltage ranging from 2.7V to 5.5V, making it compatible with many low-voltage systems. This flexibility allows for integration into battery-powered devices and other low-power applications.

6. Output Characteristics: The output of the INA2133U is linear and can drive loads up to 10 kΩ, providing a voltage output that is proportional to the sensed current. The output is also rail-to-rail, maximizing the dynamic range of the output signal.

7. Package and Thermal Performance: The INA2133U is available in a compact 8-pin VSSOP package, which is ideal for space-constrained applications. The thermal performance of the device is optimized for efficient heat dissipation, ensuring reliable operation even under high load conditions.

8. Applications: This current sense amplifier is widely used in applications such as:

   • Battery management systems for monitoring charge and discharge currents.
   • Power supply monitoring to ensure efficient operation and prevent overloads.
   • Motor control systems for feedback on motor current to optimize performance.

Conclusion:

The INA2133U/2K5 from Texas Instruments is a highly versatile and accurate current sense amplifier that meets the demands of modern electronic applications. Its combination of precision, low power consumption, and wide input range makes it an excellent choice for engineers looking to implement reliable current sensing in their designs.