Overview
The INA186A2IDDFR is a low-power, voltage-output, current-sense amplifier produced by Texas Instruments. This device is designed for precise current measurement and is commonly used in applications such as overcurrent protection, system optimization, and closed-loop feedback circuits. The INA186A2IDDFR operates from a single 1.7-V to 5.5-V power supply and is available in the SOT-23-THN (DDF) package, which includes an enable pin for power management.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage (VS) | 1.7 to 5.5 | V |
| Common-Mode Voltage Range (VCM) | -0.2 to +40 | V |
| Input Bias Current (IIB) | 500 pA (typical) | pA |
| Quiescent Current (IQ) | 48 µA (typical) | µA |
| Gain Error (EG) | ±1% (maximum) | % |
| Gain Drift | 10 ppm/°C (maximum) | ppm/°C |
| Offset Voltage (VOS) | ±50 µV (maximum) | µV |
| Offset Drift | 0.5 µV/°C (maximum) | µV/°C |
| Common-Mode Rejection Ratio (CMRR) | 120 dB (minimum) | dB |
| Operating Temperature Range | -40 to +125 | °C |
| Gain Option (INA186A2) | 50 V/V | V/V |
Key Features
- Wide Common-Mode Voltage Range: The INA186A2IDDFR can sense voltages across current-sensing resistors with common-mode voltages ranging from -0.2 V to +40 V, independent of the supply voltage.
- Low Input Bias Current: With a typical input bias current of 500 pA, this device enables accurate microamp current measurements.
- Low Power Consumption: The device operates with a low supply voltage of 1.7 V to 5.5 V and draws a maximum quiescent current of 48 µA.
- High Accuracy: Features a low offset voltage of ±50 µV and a gain error of ±1%, ensuring high accuracy in current measurements.
- Bidirectional Current Sensing: Capable of measuring currents in both directions, making it suitable for applications involving charging and discharging operations.
- Enable Pin: Available in the DDF package, allowing the device to be disabled and reducing the supply current to less than 0.1 µA.
Applications
- Overcurrent Protection: Used to monitor and protect systems from overcurrent conditions.
- Precision Current Measurement: Ideal for system optimization and precise current measurement in various applications.
- Closed-Loop Feedback Circuits: Utilized in feedback circuits to maintain precise control over current levels.
- Charging and Discharging Systems: Suitable for applications involving bidirectional current flow, such as battery charging and discharging systems.
Q & A
- What is the common-mode voltage range of the INA186A2IDDFR?
The common-mode voltage range is from -0.2 V to +40 V.
- What is the typical input bias current of the INA186A2IDDFR?
The typical input bias current is 500 pA.
- What is the supply voltage range for the INA186A2IDDFR?
The supply voltage range is from 1.7 V to 5.5 V.
- What is the maximum quiescent current of the INA186A2IDDFR?
The maximum quiescent current is 48 µA.
- Does the INA186A2IDDFR support bidirectional current sensing?
Yes, it supports bidirectional current sensing.
- What is the gain option for the INA186A2IDDFR?
The gain option for the INA186A2 is 50 V/V.
- How does the enable pin function in the INA186A2IDDFR?
The enable pin allows the device to be disabled, reducing the supply current to less than 0.1 µA.
- What is the operating temperature range of the INA186A2IDDFR?
The operating temperature range is from -40°C to +125°C.
- What is the common-mode rejection ratio (CMRR) of the INA186A2IDDFR?
The CMRR is 120 dB (minimum).
- How does the INA186A2IDDFR handle differential input overload?
If the differential input voltage exceeds the voltage swing specification, the output drives as close as possible to the positive supply or ground and does not provide accurate measurement. Reducing the shunt resistor value or using a lower-gain version can avoid this mode of operation.
