Overview
The INA168NA/3K is a high-side current monitor designed by Texas Instruments for various power management applications. This device is part of the INA1x8 family, which includes the INA138 and INA168, both known for their high-side, unipolar current shunt monitoring capabilities. The INA168NA/3K is particularly notable for its wide input common-mode voltage range, low quiescent current, and compact SOT-23-5 packaging, making it suitable for a wide range of applications including power supply monitoring, battery chargers, portable devices, and industrial and automotive systems.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 2.7 V to 60 V | V |
| Accuracy | ±0.5% | % |
| Operating Temperature Range | –40°C to 125°C | °C |
| Package Type | SOT-23-5 | - |
| Quiescent Current | 25 µA (Typical) | µA |
| Bandwidth | Up to 800 kHz | kHz |
| Output Impedance | 1 || 5 GΩ|| pF | - |
| Settling Time | 1.8 µs (ROUT = 5 kΩ), 30 µs (ROUT = 125 kΩ) | µs |
Key Features
- High-Side Current Sensing: Capable of measuring current on the high side of the shunt resistor, which is beneficial for monitoring currents in power supply lines without disrupting the circuit.
- Wide Voltage Range: Input common-mode and power-supply voltages can range from 2.7 V to 60 V, making it versatile for various applications.
- Low Quiescent Current: Only 25 µA typical, which minimizes power consumption and allows for efficient operation.
- High Accuracy: Offers an accuracy of ±0.5%, ensuring precise current measurement.
- Compact Packaging: Available in a small SOT-23-5 package, suitable for space-sensitive designs.
- Wide Temperature Range: Operates from –40°C to 125°C, making it robust for use in diverse environmental conditions.
- Single Resistor Gain Set: Allows for flexible gain setting using an external load resistor.
Applications
- Power Supply Monitoring: Ideal for monitoring current in power supply lines to ensure efficient and safe operation.
- Battery Chargers: Used in battery charging systems to monitor and control charging currents accurately.
- Portable Devices: Suitable for current monitoring in portable electronic devices due to its low power consumption and small size.
- Industrial and Automotive Systems: Robust enough to be used in industrial and automotive applications where reliability and precision are crucial.
Q & A
- What is the input voltage range of the INA168NA/3K?
The input voltage range of the INA168NA/3K is from 2.7 V to 60 V.
- What is the typical quiescent current of the INA168NA/3K?
The typical quiescent current is 25 µA.
- What is the operating temperature range of the INA168NA/3K?
The operating temperature range is from –40°C to 125°C.
- What package type is the INA168NA/3K available in?
The INA168NA/3K is available in a SOT-23-5 package.
- What is the accuracy of the INA168NA/3K?
The accuracy is ±0.5%.
- What are some common applications of the INA168NA/3K?
Common applications include power supply monitoring, battery chargers, portable devices, and industrial and automotive systems.
- How is the gain set for the INA168NA/3K?
The gain can be set using a single external load resistor.
- What is the bandwidth of the INA168NA/3K?
The bandwidth can be up to 800 kHz.
- What is the settling time of the INA168NA/3K?
The settling time is 1.8 µs (ROUT = 5 kΩ) and 30 µs (ROUT = 125 kΩ).
- Is the INA168NA/3K suitable for high-side current measurement?
Yes, it is specifically designed for high-side current measurement.
