Overview
The INA186A1IDDFR is a low-power, bidirectional, zero-drift, 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 INA186A1IDDFR operates from a single supply voltage of 1.7 V to 5.5 V and features a wide common-mode voltage range of –0.2 V to +40 V, independent of the supply voltage. It is commonly used in various electronic systems for overcurrent protection, system optimization, and closed-loop feedback circuits.
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 Options | 25 V/V, 50 V/V, 100 V/V, 200 V/V, 500 V/V | 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: Operates with common-mode voltages from –0.2 V to +40 V, independent of the supply voltage.
- Low Input Bias Current: Typical input bias current of 500 pA, enabling accurate microamp current measurements.
- Low Power Consumption: Low supply voltage and quiescent current of 48 µA (typical), making it suitable for battery-powered devices.
- 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 current in both directions, useful in applications involving charging and discharging operations.
- High Common-Mode Rejection: CMRR of 120 dB (minimum), allowing accurate current measurements across a wide range of voltage rails.
- 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 some packages, allowing the device to be turned off to reduce power consumption when not in use.
Applications
- Standard Notebook PC: For precise current measurement and overcurrent protection.
- Smartphone: To monitor and manage battery charging and discharging.
- Consumer Battery Charger: Ensures accurate current measurement and safety features.
- Baseband Unit (BBU): In telecommunications equipment for current monitoring.
- Merchant Network and Server PSU: For power supply units in data centers and servers.
- Battery Test: For precise measurement of battery current during testing.
Q & A
- What is the supply voltage range of the INA186A1IDDFR?
The INA186A1IDDFR operates from a single supply voltage of 1.7 V to 5.5 V.
- What is the common-mode voltage range of the INA186A1IDDFR?
The common-mode voltage range is from –0.2 V to +40 V.
- What are the gain options available for the INA186A1IDDFR?
The gain options are 25 V/V, 50 V/V, 100 V/V, 200 V/V, and 500 V/V.
- What is the typical input bias current of the INA186A1IDDFR?
The typical input bias current is 500 pA.
- Can the INA186A1IDDFR measure current in both directions?
- What is the operating temperature range of the INA186A1IDDFR?
The operating temperature range is from –40°C to +125°C.
- What are the package options available for the INA186A1IDDFR?
The package options include SC70, SOT-23-THIN, and DSBGA.
- How does the enable pin function in the INA186A1IDDFR?
The enable pin allows the device to be turned off to reduce power consumption when not in use.
- What is the common-mode rejection ratio (CMRR) of the INA186A1IDDFR?
The CMRR is approximately 120 dB (minimum).
- What are some typical applications of the INA186A1IDDFR?
Typical applications include standard notebook PCs, smartphones, consumer battery chargers, baseband units, and battery testing.
