Overview
The INA186A4IDDFR is a low-power, voltage-output, current-sense amplifier produced by Texas Instruments. This device is designed for precision current measurement and is particularly useful in applications requiring high accuracy and low power consumption. The INA186A4IDDFR operates from a single supply voltage of 1.7 V to 5.5 V and features a low quiescent current of 48 µA (typical), making it suitable for battery-powered and power-sensitive systems.
The device supports bidirectional current sensing and can measure currents through a resistive shunt in both directions, which is beneficial in applications involving charging and discharging operations. It also offers a wide common-mode voltage range of –0.2 V to +40 V, independent of the supply voltage, and features high common-mode rejection ratio (CMRR) of 120 dB (minimum).
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 |
| Gain Option | 200 V/V (for INA186A4) | V/V |
| Operating Temperature Range | –40°C to +125°C | °C |
| Package Options | SC70, SOT-23-THIN, DSBGA |
Key Features
- Wide Common-Mode Voltage Range: –0.2 V to +40 V, independent of the supply voltage.
- Low Input Bias Current: 500 pA (typical), enabling accurate microamp current measurements.
- Low Power Consumption: Low supply voltage (1.7 V to 5.5 V) and low quiescent current (48 µA typical).
- High Accuracy: Low gain error (±1% maximum), low offset voltage (±50 µV maximum), and low offset drift (0.5 µV/°C maximum).
- Bidirectional Current Sensing: Capable of measuring currents in both directions, useful for charging and discharging applications.
- High Common-Mode Rejection Ratio (CMRR): 120 dB (minimum), ensuring accurate measurements despite common-mode voltage changes.
- Rail-to-Rail Output Swing: Output voltage can swing close to the supply rail and ground, maximizing the usable output range.
- Enable Pin: Available in DDF and YFD packages, allowing the device to be turned off when not in use, reducing supply current to less than 0.1 µA.
Applications
- Standard Notebook PC: For precise current measurement and overcurrent protection.
- Smartphone: To monitor and manage battery charging and discharging.
- Consumer Battery Charger: Ensuring accurate current measurement during charging cycles.
- Baseband Unit (BBU): In telecommunications equipment for power management.
- Merchant Network and Server PSU: For monitoring and optimizing power consumption.
- Battery Test: To evaluate battery performance and health.
Q & A
- What is the supply voltage range for the INA186A4IDDFR?
The supply voltage range is 1.7 V to 5.5 V.
- What is the common-mode voltage range of the INA186A4IDDFR?
The common-mode voltage range is –0.2 V to +40 V.
- What is the typical input bias current of the INA186A4IDDFR?
The typical input bias current is 500 pA.
- What are the gain options available for the INA186 series?
The gain options are 25 V/V, 50 V/V, 100 V/V, 200 V/V, and 500 V/V.
- Does the INA186A4IDDFR support bidirectional current sensing?
Yes, it supports bidirectional current sensing.
- What is the operating temperature range of the INA186A4IDDFR?
The operating temperature range is –40°C to +125°C.
- What are the package options available for the INA186A4IDDFR?
The package options include SC70, SOT-23-THIN, and DSBGA.
- How does the enable pin function in the INA186A4IDDFR?
The enable pin allows the device to be turned off when not in use, reducing the supply current to less than 0.1 µA.
- What is the common-mode rejection ratio (CMRR) of the INA186A4IDDFR?
The CMRR is 120 dB (minimum).
- What are some typical applications of the INA186A4IDDFR?
Typical applications include standard notebook PCs, smartphones, consumer battery chargers, baseband units, and server power supplies.
