Overview
The INA186A3IDCKR 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 current consumption. The INA186 operates from a single 1.7-V to 5.5-V power supply and features a bidirectional current sensing capability, making it versatile for both high-side and low-side current sensing configurations.
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 Options | 25 V/V, 50 V/V, 100 V/V, 200 V/V, 500 V/V | V/V |
| Gain Error (EG) | ±1% (maximum) | % |
| 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°C to +125°C | °C |
| Package Options | SC70, SOT-23-THIN, DSBGA |
Key Features
- Wide Common-Mode Voltage Range: The INA186 can sense drops across shunts at 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).
- High Accuracy: Low gain error (±1% maximum) and offset voltage (±50 µV maximum), ensuring precise current measurements.
- Bidirectional Current Sensing: Supports both high-side and low-side current sensing configurations.
- High Common-Mode Rejection: CMRR of 120 dB (minimum), allowing for accurate 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.
Applications
- Standard Notebook PC: For overcurrent protection and precision current measurement.
- Smartphone: For battery management and power optimization.
- Consumer Battery Charger: For accurate current sensing and protection.
- Baseband Unit (BBU): For power management in telecommunications equipment.
- Merchant Network and Server PSU: For high-accuracy current monitoring in power supplies.
- Battery Test: For precise current measurement during battery testing.
Q & A
- What is the operating voltage range of the INA186A3IDCKR?
The INA186A3IDCKR operates from a single 1.7-V to 5.5-V power supply. - What is the common-mode voltage range of the INA186A3IDCKR?
The common-mode voltage range is from –0.2 V to +40 V. - What are the gain options available for the INA186A3IDCKR?
The gain options are 25 V/V, 50 V/V, 100 V/V, 200 V/V, and 500 V/V. - What is the typical quiescent current of the INA186A3IDCKR?
The typical quiescent current is 48 µA. - What is the maximum offset voltage of the INA186A3IDCKR?
The maximum offset voltage is ±50 µV. - What is the common-mode rejection ratio (CMRR) of the INA186A3IDCKR?
The CMRR is 120 dB (minimum). - What are the package options available for the INA186A3IDCKR?
The package options are SC70, SOT-23-THIN, and DSBGA. - Can the INA186A3IDCKR be used for both high-side and low-side current sensing?
Yes, it supports both high-side and low-side current sensing configurations. - What is the operating temperature range of the INA186A3IDCKR?
The operating temperature range is from –40°C to +125°C. - How does the low input bias current benefit the INA186A3IDCKR?
The low input bias current reduces the current consumed by the device, allows for the use of input filters without affecting accuracy, and enables the use of larger current-sense resistors for accurate microamp current measurements.
