Overview
The INA186A3IDDFR is a high-precision, low-power, bidirectional current-sense amplifier produced by Texas Instruments. This device is designed for accurate current measurement across a wide dynamic range and is particularly useful in applications requiring high accuracy and low power consumption. The INA186A3IDDFR 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 applications. It supports both low-side and high-side current-sensing configurations and is available in the TSOT-23-8 package.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Supply Voltage (VS) | 1.7 | - | 5.5 | V |
| Quiescent Current (IQ) | - | 48 | 90 | µA |
| Input Bias Current (IIB) | - | 500 | - | pA |
| Common-Mode Voltage Range (VCM) | -0.2 | - | 40 | V |
| Gain Error (EG) | - | - | ±1% | - |
| Offset Voltage (VOS) | - | - | ±50 µV | - |
| Gain Drift | - | - | 10 ppm/°C | - |
| Common-Mode Rejection Ratio (CMRR) | 120 | - | - | dB |
| Operating Temperature Range | -40 | - | 125 | °C |
| Gain Options | - | - | 25 V/V, 50 V/V, 100 V/V, 200 V/V, 500 V/V | - |
Key Features
- Wide Common-Mode Voltage Range: The INA186A3IDDFR can sense voltages across shunts at common-mode voltages from –0.2 V to +40 V, independent of the supply voltage.
- Low Input Bias Current: The device features very low input bias current of 500 pA (typical), enabling accurate current measurements in the microamp range.
- Low Power Consumption: It operates with a low quiescent current of 48 µA (typical) and can be disabled to reduce supply current to less than 0.1 µA.
- High Accuracy: The device has a low offset voltage of ±50 µV and a gain error of ±1%, ensuring high accuracy in current measurements.
- Bidirectional Current Sensing: The INA186A3IDDFR supports bidirectional current sensing with the use of an external reference voltage applied to the REF pin.
- Rail-to-Rail Output Swing: The device allows linear current-sensing operation with the output close to the supply rail and ground, maximizing the usable output range.
Applications
- Standard Notebook PC: For monitoring power consumption and optimizing system performance.
- Smartphone: For battery management and power monitoring.
- Consumer Battery Charger: To ensure 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 in data centers.
- Battery Test Equipment: For precise current measurement during battery testing.
Q & A
- What is the operating supply voltage range of the INA186A3IDDFR?
The INA186A3IDDFR operates from a single supply voltage of 1.7 V to 5.5 V.
- What is the typical quiescent current of the INA186A3IDDFR?
The typical quiescent current is 48 µA.
- What is the input bias current of the INA186A3IDDFR?
The input bias current is 500 pA (typical).
- What is the common-mode voltage range of the INA186A3IDDFR?
The common-mode voltage range is from –0.2 V to +40 V.
- Does the INA186A3IDDFR support bidirectional current sensing?
Yes, it supports bidirectional current sensing with the use of an external reference voltage applied to the REF pin.
- What are the available gain options for the INA186A3IDDFR?
The gain options are 25 V/V, 50 V/V, 100 V/V, 200 V/V, and 500 V/V.
- What is the operating temperature range of the INA186A3IDDFR?
The operating temperature range is from –40°C to +125°C.
- How does the INA186A3IDDFR reduce power consumption when disabled?
When disabled, the output goes to a high-impedance state, and the supply current draw is reduced to less than 0.1 µA.
- What is the significance of the low offset voltage in the INA186A3IDDFR?
The low offset voltage of ±50 µV improves the accuracy at light loads and allows for the use of lower-value shunt resistors, reducing power loss in the current-sense circuit.
- In what package is the INA186A3IDDFR available?
The INA186A3IDDFR is available in the TSOT-23-8 package.
