Overview
The INA2181A3IDGSR is a dual-channel, high-side current-sense amplifier produced by Texas Instruments. This device is part of the INAx181 family, which is designed for cost-optimized applications requiring precise current sensing. The INA2181A3IDGSR operates from a single 2.7-V to 5.5-V power supply and is available in a 10-pin VSSOP package. It features a fixed gain of 100 V/V, making it suitable for a variety of applications that require accurate current monitoring.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Number of Channels | 2 | |
| Gain | 100 V/V | |
| Supply Voltage (VS) | 2.7 to 5.5 | V |
| Common-mode Range (VCM) | –0.2 to +26 | V |
| Offset Voltage (VOS) | ±150 µV (max at VCM = 0 V), ±500 µV (max at VCM = 12 V) | µV |
| Bandwidth | 150 kHz (A3 devices) | kHz |
| Slew Rate | 2 V/µs | V/µs |
| Quiescent Current (IQ) | 500 µA (max) | µA |
| Operating Temperature Range | –40 to +125 | °C |
Key Features
- Bidirectional current-sensing capability
- High bandwidth: up to 150 kHz for A3 devices
- Low offset voltage: ±150 µV (max at VCM = 0 V), ±500 µV (max at VCM = 12 V)
- Low offset drift: 1 µV/°C (max)
- High common-mode rejection ratio (CMRR): up to 100 dB
- Integrated matched resistor gain network to minimize gain error and reduce temperature drift
- Low quiescent current: 500 µA (max)
- Compact 10-pin VSSOP package
Applications
- Motor control
- Battery monitors and balancers
- Power management
- Lighting control
- Solar inverters
Q & A
- What is the gain of the INA2181A3IDGSR?
The gain of the INA2181A3IDGSR is 100 V/V.
- What is the operating supply voltage range for the INA2181A3IDGSR?
The operating supply voltage range is from 2.7 V to 5.5 V.
- What is the common-mode range of the INA2181A3IDGSR?
The common-mode range is from –0.2 V to +26 V.
- What is the maximum offset voltage of the INA2181A3IDGSR?
The maximum offset voltage is ±150 µV at VCM = 0 V and ±500 µV at VCM = 12 V.
- What is the bandwidth of the INA2181A3IDGSR?
The bandwidth is up to 150 kHz for A3 devices.
- What is the slew rate of the INA2181A3IDGSR?
The slew rate is 2 V/µs.
- What is the quiescent current of the INA2181A3IDGSR?
The quiescent current is 500 µA (max).
- What is the operating temperature range of the INA2181A3IDGSR?
The operating temperature range is from –40°C to +125°C.
- In what package is the INA2181A3IDGSR available?
The INA2181A3IDGSR is available in a 10-pin VSSOP package.
- What are some typical applications of the INA2181A3IDGSR?
Typical applications include motor control, battery monitors and balancers, power management, lighting control, and solar inverters.
