Overview
The INA190A1IRSWR is a low-power, voltage-output, current-shunt monitor produced by Texas Instruments. This device is designed for precision current measurement and overcurrent protection in various applications. It operates from a single 1.7-V to 5.5-V power supply and is known for its low quiescent current of 65 µA (typical) and low shutdown current of 100 nA (maximum). The INA190A1IRSWR features a zero-drift architecture, which extends the dynamic range of current measurement, allowing for accurate measurements even at microamp levels.
Key Specifications
| Parameter | Conditions | Min | Max | Unit | |
|---|---|---|---|---|---|
| Supply Voltage (VS) | 1.7 | 5.5 | V | ||
| Quiescent Current (IQ) | VS = 1.8 V, VSENSE = 0 mV | 48 | 65 | 90 | µA |
| Shutdown Current (IQDIS) | VENABLE = 0 V, VSENSE = 0 mV | 10 | 100 | nA | |
| Common-Mode Rejection Ratio (CMRR) | VSENSE = 0 mV, VIN+ = –0.1 V to 40 V | 132 | 150 | dB | |
| Offset Voltage (VOS) | VS = 1.8 V, VSENSE = 0 mV | –3 | ±15 | µV | |
| Offset Drift (dVOS/dT) | VSENSE = 0 mV, TA = –40°C to +125°C | 80 | nV/°C | ||
| Gain Error | ±0.2% | % | |||
| Gain Drift | 7 | ppm/°C | |||
| Gain Options | 25 V/V (INA190A1) | V/V | |||
| Operating Temperature Range | –40 | +125 | °C | ||
| Package Options | UQFN, SC70, SOT-23 |
Key Features
- Low Power Consumption: Operates with a low quiescent current of 65 µA (typical) and a shutdown current of 100 nA (maximum).
- High Accuracy: Features a low offset voltage of ±15 µV and a gain error of ±0.2% for precise current measurements.
- Wide Common-Mode Range: Supports input common-mode voltages from –0.2 V to +40 V, independent of the supply voltage.
- Bidirectional Current Sensing: Capable of sensing current in both directions, making it versatile for various applications.
- High Common-Mode Rejection Ratio (CMRR): Typically 150 dB, ensuring minimal impact from changes in the dc common-mode voltage.
- Rail-to-Rail Output Swing: Allows linear current-sensing operation with the output close to the supply rail and ground.
- Enable Pin: Available in UQFN and SC70 packages, allowing the device to be disabled and reducing supply current to less than 0.1 µA.
Applications
- Standard Notebook PC: Used for power management and current monitoring.
- Smartphone: Utilized in battery management and power optimization.
- Consumer Battery Charger: Employed for accurate current measurement and overcurrent protection.
- Baseband Unit (BBU): Used in telecommunications equipment for power monitoring.
- Merchant Network and Server PSU: Applied in server power supplies for efficient current sensing).
- Battery Test: Used in battery testing and monitoring systems).
Q & A
- What is the operating voltage range of the INA190A1IRSWR?
The INA190A1IRSWR operates from a single 1.7-V to 5.5-V power supply).
- What is the typical quiescent current of the INA190A1IRSWR?
The typical quiescent current is 65 µA).
- What is the shutdown current of the INA190A1IRSWR?
The shutdown current is less than 100 nA).
- What is the common-mode rejection ratio (CMRR) of the INA190A1IRSWR?
The CMRR is typically 150 dB).
- What is the offset voltage of the INA190A1IRSWR?
The offset voltage is ±15 µV).
- Does the INA190A1IRSWR support bidirectional current sensing?
Yes, it supports bidirectional current sensing).
- What are the gain options available for the INA190 series?
The gain options include 25 V/V, 50 V/V, 100 V/V, 200 V/V, and 500 V/V).
- What are the package options for the INA190A1IRSWR?
The package options include UQFN, SC70, and SOT-23).
- What is the operating temperature range of the INA190A1IRSWR?
The operating temperature range is from –40°C to +125°C).
- Can the INA190A1IRSWR be used in high-side and low-side current-sensing configurations?
Yes, it can be used in both high-side and low-side current-sensing configurations).
