Overview
The INA190A3IDCKR is a low-power, bidirectional current-sense amplifier produced by Texas Instruments. This device is part of the INA190 family and is specifically designed for precision current measurement and overcurrent protection. It operates with a single power supply ranging from 1.7 V to 5.5 V and features a low quiescent current of 50 µA at 25°C. The INA190A3IDCKR is known for its high accuracy, low offset voltage, and wide dynamic range, making it suitable for various applications requiring precise current sensing.
Key Specifications
| Parameter | Conditions | Min | Max | Unit | |
|---|---|---|---|---|---|
| Supply Voltage (VS) | 1.7 | 5.5 | V | ||
| Quiescent Current (IQ) | VS = 1.8 V to 5.0 V, TA = 25°C | 50 | 65 | µA | |
| Shutdown Current (ISD) | VENABLE = 0 V | 0.1 | µA | ||
| Input Bias Current (IB) | 0 V ≤ VENABLE ≤ VS | 100 | nA | ||
| Common-Mode Rejection Ratio (CMRR) | VSENSE = 0 mV, VIN+ = –0.1 V to 40 V, TA = –40°C to +125°C | 132 | 150 | dB | |
| Offset Voltage (VOS) | VS = 1.8 V, VSENSE = 0 mV | –3 | ±15 | µV | |
| Gain Error | A3 device | ±0.2% | |||
| Gain Drift | TA = –40°C to +125°C | 7 | ppm/°C | ||
| Gain Option (A3) | 100 | V/V | |||
| Common-Mode Voltage Range | –0.2 | 40 | V | ||
| Operating Temperature Range | –40 | 125 | °C |
Key Features
- Low Power Consumption: The device operates with a low quiescent current of 50 µA at 25°C and a shutdown current of less than 0.1 µA when disabled.
- High Accuracy: Features a low offset voltage of ±15 µV and a gain error of ±0.2% for precise current measurements.
- Wide Common-Mode Voltage Range: Can sense voltages from –0.2 V to +40 V, independent of the supply voltage.
- Bidirectional Current Sensing: Capable of sensing current in both directions.
- 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.
- Multiple Gain Options: Available in five fixed gain options: 25 V/V, 50 V/V, 100 V/V, 200 V/V, and 500 V/V.
Applications
- Standard Notebook PC: Used for precise current measurement and overcurrent protection.
- Smartphone: Ideal for battery management and power optimization.
- Consumer Battery Charger: Ensures accurate current sensing and protection during charging cycles.
- Baseband Unit (BBU): Utilized in telecommunications equipment for current monitoring.
- Merchant Network and Server PSU: Helps in power management and current sensing in server power supplies.
- Battery Test: Used in battery testing and monitoring applications.
Q & A
- What is the operating voltage range of the INA190A3IDCKR?
The INA190A3IDCKR operates with a single power supply ranging from 1.7 V to 5.5 V.
- What is the typical quiescent current of the INA190A3IDCKR?
The typical quiescent current is 50 µA at 25°C.
- What is the shutdown current when the device is disabled?
The shutdown current is less than 0.1 µA when the device is disabled.
- What is the common-mode voltage range of the INA190A3IDCKR?
The device can sense voltages from –0.2 V to +40 V.
- What are the gain options available for the INA190 series?
The INA190 series is available in five fixed gain options: 25 V/V, 50 V/V, 100 V/V, 200 V/V, and 500 V/V.
- What is the typical common-mode rejection ratio (CMRR) of the INA190A3IDCKR?
The typical CMRR is approximately 150 dB.
- What is the offset voltage of the INA190A3IDCKR?
The offset voltage is ±15 µV.
- Can the INA190A3IDCKR be used for both high-side and low-side current sensing?
Yes, the device supports both high-side and low-side current sensing due to its wide common-mode voltage range.
- What are some typical applications of the INA190A3IDCKR?
Typical applications include standard notebook PCs, smartphones, consumer battery chargers, baseband units, and server power supplies.
- What is the operating temperature range of the INA190A3IDCKR?
The device operates over a temperature range of –40°C to +125°C.
