Overview
The INA199A3DCKT from Texas Instruments is a high-precision, voltage-output, current-shunt monitor designed for accurate current measurement in a variety of applications. This device features a zero-drift topology, enabling high-precision measurements with minimal offset voltage and drift. It can operate in both low-side and high-side configurations and is capable of measuring currents on input voltage rails up to 26 V, while being powered from supply voltages as low as 2.7 V. The INA199A3DCKT is particularly useful for overcurrent protection, precision current measurement, and system optimization.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage | 2.7 to 26 | V |
| Common-Mode Range | GND – 0.3 to 26 | V |
| Offset Voltage | ±150 μV (Maximum) | μV |
| Gain Error (Maximum Over Temperature) | ±1% (C Version), ±1.5% (A and B Versions) | % |
| Offset Drift | 0.5 μV/°C (Maximum) | μV/°C |
| Gain Drift | 10 ppm/°C (Maximum) | ppm/°C |
| Gain Options | 50 V/V (INA199x1), 100 V/V (INA199x2), 200 V/V (INA199x3) | V/V |
| Quiescent Current | 100 μA (Maximum) | μA |
| Operating Temperature Range | –40 to 125 | °C |
| Package Type | 6-Pin SC70, 10-Pin UQFN |
Key Features
- Wide Common-Mode Range: –0.3 V to 26 V, allowing for current measurement on high-voltage rails.
- Low Offset Voltage: ±150 μV (Maximum), enabling precise measurements with minimal error.
- High Accuracy: Gain error of ±1% (C Version) and ±1.5% (A and B Versions) over the full temperature range.
- Low Drift: 0.5 μV/°C offset drift and 10 ppm/°C gain drift.
- Multiple Gain Options: Available in gains of 50 V/V, 100 V/V, and 200 V/V to accommodate various application needs.
- Low Quiescent Current: Maximum of 100 μA, making it suitable for power-sensitive applications.
- Compact Packages: Available in 6-Pin SC70 and 10-Pin UQFN packages for space-efficient designs.
Applications
- Notebook Computers: For power management and current monitoring.
- Cell Phones: For battery charging and power optimization.
- Qi-Compliant Wireless Charging Transmitters: For accurate current measurement during wireless charging.
- Telecom Equipment: For monitoring and managing power consumption.
- Power Management: For overcurrent protection and system optimization.
- Battery Chargers: For precise current measurement and charging control.
Q & A
- What is the common-mode range of the INA199A3DCKT?
The common-mode range is from GND – 0.3 V to 26 V.
- What is the maximum offset voltage of the INA199A3DCKT?
The maximum offset voltage is ±150 μV.
- What are the available gain options for the INA199 series?
The gain options are 50 V/V, 100 V/V, and 200 V/V.
- What is the quiescent current of the INA199A3DCKT?
The maximum quiescent current is 100 μA.
- What are the operating temperature ranges for the INA199A3DCKT?
The operating temperature range is –40°C to 125°C.
- In what packages is the INA199A3DCKT available?
The device is available in 6-Pin SC70 and 10-Pin UQFN packages.
- What is the typical application of the INA199A3DCKT in power management?
It is used for overcurrent protection, precision current measurement, and system optimization.
- How does the zero-drift topology benefit the INA199A3DCKT?
The zero-drift topology enables high-precision measurements with minimal offset voltage and drift.
- What is the bandwidth of the INA199A3DCKT?
The bandwidth varies by gain version: 80 kHz for INA199x1, 30 kHz for INA199x2, and 14 kHz for INA199x3.
- What is the slew rate of the INA199A3DCKT?
The slew rate is 0.4 V/μs.
