Overview
The INA169NA/250, produced by Texas Instruments, is a high-side, unipolar current shunt monitor. This device is designed to measure small differential voltages across a shunt resistor in the presence of large common-mode voltages. It features a wide input common-mode voltage range and high-speed operation, making it suitable for various current sensing applications. The INA169NA/250 is available in a 5-pin SOT-23 package and operates over a temperature range of –40°C to +85°C.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage Range | 2.7 to 60 | V |
| Common-Mode Input Range | 2.7 to 60 | V |
| Full-Scale Sense Voltage | 100 to 500 | mV |
| Common-Mode Rejection Ratio | 100 to 120 | dB |
| Offset Voltage | ±0.2 to ±1.5 | mV |
| Input Bias Current | 10 | µA |
| Bandwidth | 440 kHz (with RL = 10 kΩ) | |
| Quiescent Current | 60 to 125 | µA |
| Operating Temperature Range | –40 to +85 | °C |
| Package Type | SOT-23-5 |
Key Features
- Complete Unipolar High-Side Current Measurement Circuit: Allows for accurate measurement of current without the need for additional components.
- Wide Supply and Common-Mode Range: Operates with supply voltages from 2.7 V to 60 V and common-mode voltages up to 60 V.
- Independent Supply and Input Common-Mode Voltages: The input voltages can exceed the power supply voltage.
- Single Resistor Gain Set: Simplifies the gain setting process.
- Low Quiescent Current: Typical quiescent current of 60 µA.
- High-Speed Operation: Bandwidth of up to 440 kHz with a load resistor of 10 kΩ.
Applications
The INA169NA/250 is ideal for various current sensing applications, including:
- Automotive Systems: Monitoring battery current, starter motor current, and other high-current circuits.
- Industrial Automation: Current measurement in motor control, power supplies, and other industrial equipment.
- Power Management: Monitoring current in power supplies, DC-DC converters, and battery management systems.
- Medical Devices: Accurate current measurement in medical equipment and diagnostic devices.
Q & A
- What is the operating temperature range of the INA169NA/250?
The INA169NA/250 operates over a temperature range of –40°C to +85°C. - What is the typical quiescent current of the INA169NA/250?
The typical quiescent current is 60 µA. - What is the bandwidth of the INA169NA/250 with a 10 kΩ load resistor?
The bandwidth is up to 440 kHz with a 10 kΩ load resistor. - What is the common-mode rejection ratio (CMRR) of the INA169NA/250?
The CMRR is between 100 dB and 120 dB. - Can the input voltages exceed the power supply voltage?
Yes, the input voltages can exceed the power supply voltage. - What is the package type of the INA169NA/250?
The package type is SOT-23-5. - What is the full-scale sense voltage range of the INA169NA/250?
The full-scale sense voltage range is from 100 mV to 500 mV. - Is the INA169NA/250 RoHS compliant?
Yes, the INA169NA/250 is RoHS compliant. - What is the maximum input voltage for the INA169NA/250?
The maximum input voltage is 60 V. - How do you set the gain for the INA169NA/250?
The gain can be set using a single resistor.
