INA2137UA/2K5

The INA2137UA/2K5 is a precision, low-power, 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 INA2137 is optimized for high common-mode voltage applications, allowing it to measure current in high-side configurations. This is particularly useful in systems where the load is connected to the positive supply rail.

2. Gain Configuration: The amplifier has a fixed gain of 20 V/V, which means it amplifies the voltage across a shunt resistor by a factor of 20. 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, including automotive and industrial systems.

4. Low Offset Voltage: The INA2137 features a low input offset voltage, which minimizes measurement errors and enhances accuracy. This is critical in applications where precision is paramount.

5. Low Power Consumption: With a quiescent current of only a few microamperes, the INA2137 is designed for low-power applications, making it ideal for battery-operated devices.

6. Temperature Range: The device operates over an extended temperature range, typically from -40°C to +125°C, ensuring reliability in harsh environments.

7. Package Type: The INA2137UA/2K5 is available in a small, surface-mount package (SOT-23), which is advantageous for space-constrained designs.

8. Output: The output of the amplifier is a linear representation of the current flowing through the shunt resistor, allowing for easy interfacing with microcontrollers or ADCs for further processing.

Applications:

• Battery Management Systems: Monitoring charge and discharge currents in battery packs.
• Motor Control: Sensing current in motor drive applications to prevent overcurrent conditions.
• Power Monitoring: Measuring current in power supplies and converters for efficiency analysis.

Conclusion:

The INA2137UA/2K5 from Texas Instruments is a versatile and reliable current sense amplifier that combines precision, low power consumption, and a wide input voltage range. Its features make it an excellent choice for engineers looking to implement accurate current sensing in their designs.