Overview
The INA181A2IDBVR is a high-performance, bidirectional current-sense amplifier manufactured by Texas Instruments. This device is part of the INAx181 family, which includes the INA181, INA2181, and INA4181. The INA181A2IDBVR is designed for cost-optimized applications and is particularly suited for sensing voltage drops across current-sense resistors at common-mode voltages ranging from –0.2 V to +26 V, independent of the supply voltage. It operates from a single 2.7-V to 5.5-V power supply and is available in a compact 6-pin SOT-23 (DBV) package.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | SOT-23 (DBV) | - |
| Pins | 6 | - |
| Operating Temperature Range | –40 to 125 | °C |
| Common-Mode Range (VCM) | –0.2 V to +26 V | V |
| Bandwidth | 350 kHz (A1 devices), 210 kHz (A2 devices) | kHz |
| Offset Voltage | ±150 µV (max) at VCM = 0 V, ±500 µV (max) at VCM = 12 V | µV |
| Output Slew Rate | 2 V/µs | V/µs |
| Gain Options | 20 V/V (A1), 50 V/V (A2), 100 V/V (A3), 200 V/V (A4) | V/V |
| Gain Error | ±1% (max) | % |
| Offset Drift | 1 µV/°C (max) | µV/°C |
| Quiescent Current | 260 µA (max) | µA |
| Supply Voltage | 2.7 V to 5.5 V | V |
Key Features
- Bidirectional Current-Sensing Capability: The INA181A2IDBVR can sense current in both directions, making it versatile for various applications.
- High Bandwidth: With a bandwidth of up to 350 kHz for A1 devices, this amplifier supports high-frequency applications.
- Low Offset Voltage: The device features low offset voltages, with a maximum of ±150 µV at VCM = 0 V and ±500 µV at VCM = 12 V.
- High Accuracy: The amplifier has a gain error of ±1% (max) and an offset drift of 1 µV/°C (max), ensuring high accuracy in current sensing.
- Compact Package: Available in a 6-pin SOT-23 (DBV) package, making it suitable for space-constrained designs.
- Wide Common-Mode Range: Operates over a common-mode range of –0.2 V to +26 V, independent of the supply voltage.
- Low Power Consumption: Draws a maximum quiescent current of 260 µA, making it power-efficient.
Applications
- Motor Control: The INA181A2IDBVR is often used in motor control systems to monitor and control current flow accurately.
- Power Management: Suitable for power management systems where precise current sensing is crucial.
- Industrial Automation: Used in various industrial automation applications where reliable and accurate current sensing is required.
- Automotive Systems: Can be applied in automotive systems for battery management, motor control, and other current-sensing needs.
- Medical Devices: Due to its high accuracy and reliability, it can be used in medical devices that require precise current monitoring.
Q & A
- What is the common-mode range of the INA181A2IDBVR?
The common-mode range of the INA181A2IDBVR is from –0.2 V to +26 V.
- What are the gain options available for the INA181A2IDBVR?
The gain options are 20 V/V (A1), 50 V/V (A2), 100 V/V (A3), and 200 V/V (A4).
- What is the maximum quiescent current of the INA181A2IDBVR?
The maximum quiescent current is 260 µA.
- What is the operating temperature range of the INA181A2IDBVR?
The operating temperature range is from –40°C to +125°C.
- What is the bandwidth of the INA181A2IDBVR?
The bandwidth is up to 350 kHz for A1 devices and 210 kHz for A2 devices.
- What package type is the INA181A2IDBVR available in?
The INA181A2IDBVR is available in a 6-pin SOT-23 (DBV) package.
- What is the supply voltage range for the INA181A2IDBVR?
The supply voltage range is from 2.7 V to 5.5 V.
- What are some typical applications of the INA181A2IDBVR?
Typical applications include motor control, power management, industrial automation, automotive systems, and medical devices.
- What is the maximum offset voltage of the INA181A2IDBVR?
The maximum offset voltage is ±150 µV at VCM = 0 V and ±500 µV at VCM = 12 V.
- What is the output slew rate of the INA181A2IDBVR?
The output slew rate is 2 V/µs.
