Texas Instruments

INA122U/2K5

The INA122U/2K5 is a high-side current shunt and temperature sensor from Texas Instruments. It is designed to measure current and temperature in a wide range of applications, including battery monitoring, power management, and motor control.

Description:

The INA122U/2K5 is a monolithic, precision current shunt monitor that integrates a temperature sensor, a low-drift amplifier, and a 12-bit ADC. It offers high accuracy, low power consumption, and a wide input voltage range. The device is available in a small, thermally enhanced 16-pin TSSOP package.

Features:

1. High-Side Current Measurement: The INA122U/2K5 can measure currents up to ±2000mA with a high accuracy of ±0.25% over temperature.
2. Integrated Temperature Sensor: The device includes a temperature sensor with a range of -40°C to +125°C and an accuracy of ±2°C.
3. Low Power Consumption: The INA122U/2K5 operates with a low power consumption of 175µA in normal mode and 1.1µA in shutdown mode.
4. Wide Input Voltage Range: The device can operate with input voltages from 3.3V to 28V, making it suitable for a wide range of applications.
5. Programmable Gain Amplifier (PGA): The INA122U/2K5 features a PGA that allows for flexible current measurement ranges and improved accuracy.
6. I2C and SMBus Communication Interface: The device uses an I2C and SMBus compatible communication interface for easy integration with microcontrollers and other digital systems.
7. Alert Pin: The INA122U/2K5 has an alert pin that can be configured to trigger an interrupt or generate an event when the measured current or temperature exceeds a programmable threshold.
8. Thermal Shutdown: The device includes a thermal shutdown feature that protects it from overheating.

Applications:

1. Battery Monitoring: The INA122U/2K5 can be used to measure the current and temperature of batteries in various applications, such as portable electronics, electric vehicles, and energy storage systems.
2. Power Management: The device can be used in power management systems to monitor the current and temperature of power supplies, power distribution systems, and power converters.
3. Motor Control: The INA122U/2K5 can be used to measure the current and temperature of motors in applications such as robotics, industrial automation, and HVAC systems.
4. Energy Harvesting: The device can be used to monitor the current and temperature of energy harvesting systems, such as solar panels and thermoelectric generators.
5. Lighting Systems: The INA122U/2K5 can be used to measure the current and temperature of LED lighting systems and other lighting applications.
6. Medical Devices: The device can be used to monitor the current and temperature of medical devices that require precise current and temperature measurements, such as wearable devices and medical equipment.

In summary, the INA122U/2K5 from Texas Instruments is a versatile and accurate current and temperature sensor that can be used in a wide range of applications. Its high accuracy, low power consumption, and wide input voltage range make it an ideal choice for monitoring current and temperature in various systems.