Overview
The INA181A1IDBVR is a bidirectional current-sense amplifier produced by Texas Instruments. It is part of the INAx181 family, which includes single-channel (INA181), dual-channel (INA2181), and quad-channel (INA4181) devices. These amplifiers are designed for cost-optimized applications and are used to sense voltage drops across current-sense resistors at common-mode voltages ranging from –0.2 V to +26 V, independent of the supply voltage. The INA181A1IDBVR operates from a single 2.7-V to 5.5-V power supply and is available in a 6-pin SOT-23 package.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | SOT-23 (DBV) | - |
| Pins | 6 | - |
| Operating Temperature Range | –40 to 125 | °C |
| Supply Voltage (VS) | 2.7 to 5.5 | V |
| Common-Mode Range (VCM) | –0.2 to +26 | V |
| Bandwidth (A1 devices) | 350 kHz | - |
| Offset Voltage (VOS) | ±150 µV (at VCM = 0 V), ±500 µV (at VCM = 12 V) | µV |
| Output Slew Rate | 2 V/µs | - |
| Gain (A1 devices) | 20 V/V | - |
| Gain Error | ±1% (maximum) | - |
| Offset Drift | 1 µV/°C (maximum) | µV/°C |
| Quiescent Current | 260 µA (maximum) | µA |
Key Features
- Bidirectional current-sensing capability
- High bandwidth: 350 kHz for A1 devices
- Low offset voltage: ±150 µV (maximum) at VCM = 0 V and ±500 µV (maximum) at VCM = 12 V
- High accuracy: ±1% gain error (maximum) and 1 µV/°C offset drift (maximum)
- Integrated matched resistor gain network in four fixed-gain options: 20 V/V, 50 V/V, 100 V/V, or 200 V/V
- Output slew rate: 2 V/µs
- Low quiescent current: 260 µA (maximum)
- Operating temperature range: –40°C to +125°C
Applications
- Motor control
- Battery monitors and balancers
- Power management
- Lighting control
- Solar inverters
Q & A
- What is the operating temperature range of the INA181A1IDBVR? The operating temperature range is –40°C to +125°C.
- What is the supply voltage range for the INA181A1IDBVR? The supply voltage range is 2.7 V to 5.5 V.
- What are the common-mode range and bandwidth of the INA181A1IDBVR? The common-mode range is –0.2 V to +26 V, and the bandwidth for A1 devices is 350 kHz.
- What is the gain of the INA181A1IDBVR? The gain for A1 devices is 20 V/V.
- What is the quiescent current of the INA181A1IDBVR? The quiescent current is 260 µA (maximum).
- What are the key applications of the INA181A1IDBVR? Key applications include motor control, battery monitors and balancers, power management, lighting control, and solar inverters.
- What is the package type and pin count of the INA181A1IDBVR? The package type is SOT-23 (DBV) with 6 pins.
- What is the offset voltage and offset drift of the INA181A1IDBVR? The offset voltage is ±150 µV (maximum) at VCM = 0 V and ±500 µV (maximum) at VCM = 12 V. The offset drift is 1 µV/°C (maximum).
- Does the INA181A1IDBVR support bidirectional current sensing? Yes, it supports bidirectional current sensing.
- What is the output slew rate of the INA181A1IDBVR? The output slew rate is 2 V/µs.
