Overview
The INA199A2DCKT is a 26-V, bidirectional, zero-drift, voltage-output current-shunt monitor produced by Texas Instruments. This device is part of the INA199 series and is designed for high-precision current measurement. It can be used in both low-side and high-side configurations, making it versatile for various applications. The zero-drift topology ensures high accuracy with a maximum input offset voltage of ±150 μV and a temperature drift of 0.5 μV/°C over the full temperature range of –40°C to 125°C.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage | 2.7 to 26 | V |
| Common-Mode Input Voltage | GND – 0.3 to 26 | V |
| Offset Voltage | ±150 μV (Maximum) | μV |
| Gain Error (Maximum Over Temperature) | ±1.5% (A and B Versions), ±1% (C Version) | % |
| Gain Drift (Maximum) | 10 ppm/°C | 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 Options | 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.
- Zero-Drift Topology: Ensures high-precision measurements with low offset voltage and minimal temperature drift.
- Low Offset Voltage: ±150 μV (Maximum), enabling shunt drops as low as 10 mV full-scale.
- Choice of Gains: Available in 50 V/V, 100 V/V, and 200 V/V configurations to accommodate various application needs.
- Low Quiescent Current: Maximum of 100 μA, making it power-efficient.
- Compact Packages: Available in 6-Pin SC70 and 10-Pin UQFN packages for space-constrained designs.
Applications
- Notebook Computers: For power management and current monitoring.
- Cell Phones: For battery management and charging circuits.
- Qi-Compliant Wireless Charging Transmitters: For precise current measurement during wireless charging.
- Telecom Equipment: For monitoring and managing power supply currents.
- Power Management: For overcurrent protection and system optimization.
- Battery Chargers: For accurate current measurement during charging cycles.
Q & A
- What is the maximum common-mode input voltage for the INA199A2DCKT?
The maximum common-mode input voltage is 26 V.
- What are the available gain options for the INA199 series?
The available gain options are 50 V/V, 100 V/V, and 200 V/V.
- What is the typical quiescent current of the INA199A2DCKT?
The typical quiescent current is 100 μA (Maximum).
- What is the operating temperature range of the INA199A2DCKT?
The operating temperature range is –40°C to 125°C.
- What packages are available for the INA199A2DCKT?
The device is available in 6-Pin SC70 and 10-Pin UQFN packages.
- What is the significance of the zero-drift topology in the INA199A2DCKT?
The zero-drift topology ensures high-precision measurements with low offset voltage and minimal temperature drift.
- Can the INA199A2DCKT be used in high-side configurations?
- What are some common applications of the INA199A2DCKT?
- How does the INA199A2DCKT handle common-mode transients above 26 V?
- What is the maximum input offset voltage of the INA199A2DCKT?
