Overview
The INA186A2IDCKR 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 INA186A2IDCKR operates from a single 1.7-V to 5.5-V power supply and features a low quiescent current of 48 µA (typical), making it suitable for battery-powered and portable electronic systems. It supports both high-side and low-side current sensing with a wide common-mode voltage range of –0.2 V to +40 V, independent of the supply voltage.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Supply Voltage (VS) | 1.7 | 5.5 | V | ||
| Common-Mode Voltage Range (VCM) | –0.2 | 40 | V | ||
| Input Bias Current (IIB) | –500 | 500 | 500 | pA | |
| Quiescent Current (IQ) | 48 | 90 | µA | ||
| Offset Voltage (VOS) | VS = 1.8 V, VSENSE = 0 mV | –50 | ±50 | 50 | µV |
| Offset Drift (dVOS/dT) | VSENSE = 0 mV, TA = –40°C to +125°C | 0.05 | 0.5 | 0.5 | µV/°C |
| Common-Mode Rejection Ratio (CMRR) | VSENSE = 0 mV, VIN+ = –0.1 V to 40 V, TA = –40°C to +125°C | 120 | 150 | dB | |
| Gain Error (EG) | ±1% | % | |||
| Gain Drift | 10 | ppm/°C | |||
| Gain Option | 50 | V/V |
Key Features
- Wide Common-Mode Voltage Range: The INA186A2IDCKR 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: With a typical input bias current of 500 pA, this device allows for accurate current measurements in the microamp range and the use of larger current-sense resistors.
- Low Power Consumption: The device operates with a low quiescent current of 48 µA (typical) and can be powered down to reduce supply current to less than 0.1 µA.
- High Accuracy: Features low offset voltage (±50 µV maximum) and low gain error (±1% maximum), ensuring precise current measurements.
- Bidirectional Current Sensing: Capable of measuring currents in both directions, making it suitable for applications involving charging and discharging operations.
- High Common-Mode Rejection Ratio: Typically 150 dB, allowing the device to reject changes in the dc common-mode voltage effectively.
- Rail-to-Rail Output Swing: The output voltage can swing close to the supply rail and ground, maximizing the usable output range.
Applications
- Standard Notebook PC: Used for overcurrent protection and precision current measurement.
- Smartphone: Ideal for battery management and power optimization.
- Consumer Battery Charger: Ensures accurate current measurement during charging cycles.
- Baseband Unit (BBU): Used in telecommunications equipment for power monitoring.
- Merchant Network and Server PSU: Helps in optimizing power consumption and monitoring current in server power supplies.
- Battery Test: Utilized in battery testing equipment for precise current measurement.
Q & A
- What is the supply voltage range for the INA186A2IDCKR?
The INA186A2IDCKR operates from a single 1.7-V to 5.5-V power supply.
- What is the common-mode voltage range of the INA186A2IDCKR?
The device can sense voltages across shunts at common-mode voltages from –0.2 V to +40 V.
- What is the typical input bias current of the INA186A2IDCKR?
The typical input bias current is 500 pA.
- What are the gain options available for the INA186A2IDCKR?
The INA186 family includes gain options of 25 V/V, 50 V/V, 100 V/V, 200 V/V, and 500 V/V. The INA186A2IDCKR specifically has a gain of 50 V/V.
- Can the INA186A2IDCKR measure current in both directions?
- What is the typical quiescent current of the INA186A2IDCKR?
The typical quiescent current is 48 µA.
- How does the enable pin function on the INA186A2IDCKR?
The enable pin allows the device to be turned off, reducing the supply current to less than 0.1 µA when not in use.
- What is the common-mode rejection ratio (CMRR) of the INA186A2IDCKR?
The CMRR is typically 150 dB.
- What are some common applications of the INA186A2IDCKR?
Common applications include standard notebook PCs, smartphones, consumer battery chargers, baseband units, and server power supplies.
- What is the operating temperature range of the INA186A2IDCKR?
The device is specified over the operating temperature range of –40°C to +125°C.
