Overview
The INA168NA/250G4 from Texas Instruments is a high-side, unipolar current shunt monitor. It is part of the INA1x8 family, which includes the INA138 and INA168 devices. These devices are designed to measure small differential voltages, such as those generated across a shunt resistor, in the presence of large common-mode voltages. The INA168NA/250G4 is ideal for applications requiring high accuracy and a wide input voltage range.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage (V+) | 2.7 | - | 60 | V |
| Input Common-Mode Voltage Range | -0.3 | - | 75 | V |
| Sense Voltage (VSENSE) | -40 | - | 150 | mV |
| Offset Voltage | ±0.2 | ±1 | ±2 | mV |
| Transconductance | 196 | 200 | 204 | µA/V |
| Bandwidth (ROUT = 5 kΩ) | - | - | 800 | kHz |
| Quiescent Current (TA = 25°C) | 25 | 45 | 60 | µA |
| Operating Temperature Range | -55 | - | 150 | °C |
Key Features
- High-side, unipolar current shunt monitoring capability
- Wide input common-mode voltage range: -0.3 V to 75 V
- Low quiescent current: 25 µA to 60 µA
- High accuracy: ±0.5% total output error
- High transconductance: 196 µA/V to 204 µA/V
- Wide bandwidth: up to 800 kHz with ROUT = 5 kΩ
- Tiny SOT23 packaging
- Single power supply operation with input voltages exceeding the power supply voltage
Applications
- Current measurement in high-side configurations
- Monitoring of battery charging and discharging currents
- Power management and control systems
- Automotive and industrial control systems
- Overcurrent protection circuits
Q & A
- What is the input common-mode voltage range of the INA168NA/250G4?
The input common-mode voltage range is from -0.3 V to 75 V.
- What is the typical quiescent current of the INA168NA/250G4 at 25°C?
The typical quiescent current at 25°C is 45 µA.
- What is the bandwidth of the INA168NA/250G4 with a 5 kΩ load resistor?
The bandwidth with a 5 kΩ load resistor is up to 800 kHz.
- What is the accuracy of the INA168NA/250G4?
The total output error accuracy is ±0.5%.
- What is the operating temperature range of the INA168NA/250G4?
The operating temperature range is from -55°C to 150°C.
- Can the INA168NA/250G4 be powered from a single power supply?
Yes, the INA168NA/250G4 can be powered from a single power supply, and its input voltages can exceed the power supply voltage.
- What is the package type of the INA168NA/250G4?
The package type is SOT23.
- Is the INA168NA/250G4 suitable for high-side current monitoring?
Yes, it is specifically designed for high-side, unipolar current shunt monitoring.
- What are some common applications of the INA168NA/250G4?
Common applications include current measurement in high-side configurations, battery charging and discharging monitoring, power management, and automotive and industrial control systems.
- Is the INA168NA/250G4 still in production?
No, the INA168NA/250G4 is no longer manufactured. You may need to consider substitutes or alternative package types.
