Overview
The INA282AIDR, part of the INA28x family from Texas Instruments, is a high-accuracy, wide common-mode range, bidirectional current shunt monitor. This device is designed to accurately measure voltages developed across current-sensing resistors at common-mode voltages that can range from –14 V to +80 V, independent of the supply voltage. The zero-drift topology of the INA282AIDR enables high-precision measurements with low input offset voltages and minimal temperature drift, making it suitable for applications requiring precise current sensing.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage (V+) | 2.7 to 18 | V |
| Common-Mode Range | –14 to +80 | V |
| Input Offset Voltage | ±20 µV | µV |
| Offset Drift | 0.3 µV/°C | µV/°C |
| Gain Error (Max) | ±1.4% | % |
| Gain Drift (Max) | 0.005%/°C | %/°C |
| Quiescent Current (Max) | 900 µA | µA |
| Operating Temperature Range | –40°C to +125°C | °C |
| Package Options | SOIC-8, VSSOP-8 | |
| Gain (INA282) | 50 V/V | V/V |
Key Features
- Wide Common-Mode Range: –14 V to +80 V, allowing for low-side or high-side current sensing.
- High Accuracy: Low input offset voltage (±20 µV) and minimal temperature drift (0.3 µV/°C).
- Zero-Drift Topology: Enables precise measurements with low full-scale drops across the shunt resistor.
- Single Supply Operation: Operates from a single supply voltage of 2.7 V to 18 V.
- High CMRR: Common-mode rejection ratio of 140 dB.
- Transient Protection: Can withstand automotive fault conditions without additional protective components up to 80 V.
Applications
- Telecom Equipment: For precise current monitoring in telecommunications systems.
- Automotive: Suitable for automotive applications due to its ability to withstand high transient voltages.
- Power Management: Used in power management systems for accurate current sensing.
- Solar Inverters: For monitoring current in solar inverter systems.
Q & A
- What is the common-mode range of the INA282AIDR?
The common-mode range is from –14 V to +80 V.
- What is the input offset voltage of the INA282AIDR?
The input offset voltage is ±20 µV.
- What is the gain of the INA282AIDR?
The gain of the INA282AIDR is 50 V/V.
- What is the operating temperature range of the INA282AIDR?
The operating temperature range is from –40°C to +125°C.
- What are the package options for the INA282AIDR?
The package options are SOIC-8 and VSSOP-8.
- Can the INA282AIDR withstand high transient voltages?
- What is the quiescent current of the INA282AIDR?
The quiescent current is a maximum of 900 µA.
- What is the typical application of the INA282AIDR in telecom equipment?
- How does the zero-drift topology benefit the INA282AIDR?
The zero-drift topology enables high-precision measurements with low input offset voltages and minimal temperature drift.
- What is the common-mode rejection ratio (CMRR) of the INA282AIDR?
The CMRR is 140 dB.
