Overview
The INA181A2IDBVT is a bidirectional, low- and high-side voltage output current sense amplifier manufactured by Texas Instruments. This device is part of the INAx181 family, which is designed for cost-optimized applications. It integrates a matched resistor gain network, offering four fixed-gain options: 20 V/V, 50 V/V, 100 V/V, and 200 V/V. The INA181A2IDBVT is particularly useful 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.
Key Specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOT-23 (DBV)-6 |
| Common-mode voltage range (V) | –0.2 to +26 |
| Input offset voltage (±) (max) (µV) | 150 at VCM = 0 V, 500 at VCM = 12 V |
| Input offset drift (±) (typ) (µV/°C) | 1 |
| Voltage gain (V/V) | 50 (for INA181A2 devices) |
| CMRR (min) (dB) | 84 |
| Bandwidth (kHz) | 105, 150, 210, 350 |
| Supply voltage range (V) | 2.7 to 5.5 |
| Quiescent current (max) (mA) | 0.3 |
| Number of channels | 1 |
| Operating temperature range (°C) | –40 to +125 |
| Output slew rate (V/µs) | 2 |
Key Features
- Bidirectional current-sensing capability
- Low- and high-side voltage output
- Integrated matched resistor gain network
- Four fixed-gain options: 20 V/V, 50 V/V, 100 V/V, and 200 V/V
- High bandwidth: up to 350 kHz
- Low offset voltage and drift: ±150 µV and 1 µV/°C respectively
- Low quiescent current: 260 µA maximum
- Single 2.7-V to 5.5-V power supply operation
- Extended operating temperature range: –40°C to +125°C
Applications
The INA181A2IDBVT is suitable for a variety of applications, including:
- Current monitoring in power supplies and battery management systems
- Motor control and robotics
- Automotive systems for current sensing
- Industrial automation and control systems
- Medical devices requiring precise current measurement
Q & A
- What is the common-mode voltage range of the INA181A2IDBVT?
The common-mode voltage range is from –0.2 V to +26 V.
- What are the available gain options for the INA181A2IDBVT?
The gain options are 20 V/V, 50 V/V, 100 V/V, and 200 V/V, with the INA181A2IDBVT specifically offering a gain of 50 V/V.
- What is the maximum quiescent current of the INA181A2IDBVT?
The maximum quiescent current is 260 µA.
- What is the operating temperature range of the INA181A2IDBVT?
The operating temperature range is from –40°C to +125°C.
- What package types are available for the INA181A2IDBVT?
The device is available in a 6-pin SOT-23 (DBV) package.
- What is the bandwidth of the INA181A2IDBVT?
The bandwidth can be up to 350 kHz, depending on the specific device variant.
- Does the INA181A2IDBVT support bidirectional current sensing?
- What is the supply voltage range for the INA181A2IDBVT?
The supply voltage range is from 2.7 V to 5.5 V.
- What is the output slew rate of the INA181A2IDBVT?
The output slew rate is 2 V/µs.
- What are some typical applications for the INA181A2IDBVT?
Typical applications include current monitoring in power supplies, motor control, automotive systems, industrial automation, and medical devices.
