Overview
The Texas Instruments INA199A1DCKR is a part of the INA199 series, which are voltage-output, current-shunt monitors (also known as current-sense amplifiers). These devices are designed for precision current measurement, overcurrent protection, and use in closed-loop feedback circuits. The INA199A1DCKR operates from a single 2.7-V to 26-V power supply and features a wide common-mode range of –0.3 V to 26 V, making it versatile for various applications.
The device is characterized by its low offset voltage of ±150 µV, which enables accurate current sensing with shunt drops as low as 10-mV full-scale. It is available in a compact 6-pin SC70 package, making it suitable for space-constrained designs.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage | 2.7 to 26 | V |
| Common-Mode Range | –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, 100 V/V, 200 V/V | V/V |
| Quiescent Current | 100 µA (Maximum) | µA |
| Operating Temperature Range | –40 to 125 | °C |
| Package | 6-Pin SC70 |
Key Features
- Wide Common-Mode Range: –0.3 V to 26 V, allowing for use in various applications.
- Low Offset Voltage: ±150 µV (Maximum), enabling shunt drops as low as 10-mV full-scale.
- Precision Bidirectional Output: Accurate current sensing in both directions.
- Choice of Gains: Available in 50 V/V, 100 V/V, and 200 V/V configurations.
- Low Power Consumption: Quiescent current of 100 µA (Maximum).
- Robust Protection Features: Includes fault detection, indication, and over-temperature protection.
- Compact Package: Available in a small, space-saving 6-pin SC70 package.
Applications
- Notebook Computers: For power management and current sensing.
- Cell Phones: For battery management and charging circuits.
- Qi-Compliant Wireless Charging Transmitters: For precise current control.
- Telecom Equipment: For power supply monitoring and protection.
- Power Management: For overcurrent protection and system optimization.
- Battery Chargers: For accurate current measurement and charging control.
- Automotive and Industrial Systems: For high-precision current sensing in harsh environments.
Q & A
- What is the common-mode voltage range of the INA199A1DCKR?
The common-mode voltage range is –0.3 V to 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 maximum quiescent current of the INA199A1DCKR?
The maximum quiescent current is 100 µA.
- What is the operating temperature range of the INA199A1DCKR?
The operating temperature range is –40°C to 125°C.
- What package options are available for the INA199 series?
The INA199 series is available in 6-pin SC70 and 10-pin UQFN packages.
- What are some of the key protection features of the INA199A1DCKR?
The device includes fault detection, indication, and over-temperature protection.
- How does the INA199A1DCKR achieve low offset voltage?
The device uses a zero-drift architecture to achieve a low offset voltage of ±150 µV.
- What is the bandwidth of the INA199A1DCKR?
The bandwidth varies by gain: 80 kHz for INA199x1, 30 kHz for INA199x2, and 14 kHz for INA199x3.
- Can the INA199A1DCKR be used in automotive applications?
- How does the INA199A1DCKR help in power management?
