Overview
The INA2181A2IDGSR is a dual-channel, bi-directional current sense amplifier produced by Texas Instruments. This device is part of the INAx181 family, designed for cost-optimized applications that require precise current sensing. It operates from a single 2.7-V to 5.5-V power supply and is available in a 10-pin VSSOP package. The INA2181A2IDGSR is suitable for various applications where accurate current measurement is crucial, such as motor control, battery monitoring, and power management.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage (VS) | 2.7 to 5.5 | V |
| Common-Mode Range (VCM) | –0.2 to +26 | V |
| Bandwidth (A2 devices) | 210 kHz | kHz |
| Offset Voltage (VOS) at VCM = 0 V | ±150 µV | µV |
| Offset Voltage (VOS) at VCM = 12 V | ±500 µV | µV |
| Output Slew Rate | 2 V/µs | V/µs |
| Gain (A2 devices) | 50 V/V | V/V |
| Gain Error | ±1% | % |
| Quiescent Current | 500 µA (maximum) | µA |
| Operating Temperature Range | –40°C to +125°C | °C |
| Package Type | 10-pin VSSOP (DGS) |
Key Features
- Bidirectional current-sensing capability
- High bandwidth: 210 kHz for A2 devices
- Low offset voltage: ±150 µV at VCM = 0 V and ±500 µV at VCM = 12 V
- High accuracy: ±1% gain error and 1 µV/°C offset drift
- Integrated matched resistor gain network for reduced gain error and temperature drift
- Common-mode range from –0.2 V to +26 V, independent of the supply voltage
- Low quiescent current: 500 µA maximum
- Operating temperature range from –40°C to +125°C
Applications
- Motor control
- Battery monitors and balancers
- Power management
- Lighting control
- Solar inverters
Q & A
- What is the supply voltage range for the INA2181A2IDGSR?
The supply voltage range is from 2.7 V to 5.5 V. - What is the common-mode range of the INA2181A2IDGSR?
The common-mode range is from –0.2 V to +26 V. - What is the bandwidth of the INA2181A2IDGSR for A2 devices?
The bandwidth is 210 kHz for A2 devices. - What is the gain of the INA2181A2IDGSR for A2 devices?
The gain is 50 V/V for A2 devices. - What is the quiescent current of the INA2181A2IDGSR?
The quiescent current is 500 µA maximum. - What is the operating temperature range of the INA2181A2IDGSR?
The operating temperature range is from –40°C to +125°C. - In what package is the INA2181A2IDGSR available?
The INA2181A2IDGSR is available in a 10-pin VSSOP (DGS) package. - What are some typical applications of the INA2181A2IDGSR?
Typical applications include motor control, battery monitors and balancers, power management, lighting control, and solar inverters. - Does the INA2181A2IDGSR support bidirectional current sensing?
Yes, the INA2181A2IDGSR supports bidirectional current sensing. - What is the offset voltage of the INA2181A2IDGSR at VCM = 0 V?
The offset voltage is ±150 µV at VCM = 0 V.
