Overview
The INA285AIDGKR from Texas Instruments is a high-accuracy, wide common-mode range, bidirectional current shunt monitor. This device is part of the INA28x family, which includes the INA282, INA283, INA284, INA285, and INA286. The INA285AIDGKR is designed to sense voltage drops across shunts at common-mode voltages ranging from –14 V to +80 V, independent of the supply voltage. It features a zero-drift architecture, which enables current sensing with high accuracy and low offset voltage.
Key Specifications
| Parameter | Min | Max | Unit | |
|---|---|---|---|---|
| Offset Voltage | ±20 | ±70 | μV | |
| Common-Mode Rejection Ratio (CMRR) | 120 | 140 | dB | |
| Gain Error | ±0.4% | ±1.6% | ||
| Gain | 1000 V/V | |||
| Supply Voltage Range | 2.7 | 18 | V | |
| Quiescent Current | 600 | 900 | μA | |
| Operating Temperature Range | –40 | +125 | °C | |
| Package | SOIC-8, VSSOP-8 |
Key Features
- High accuracy with low offset voltage of ±20 μV and gain error of ±1.6% (max)
- Wide common-mode range from –14 V to +80 V
- Zero-drift architecture for precise current sensing
- High common-mode rejection ratio (CMRR) of 140 dB
- Single supply operation from 2.7 V to 18 V
- Low quiescent current of 900 μA (max)
- Extended operating temperature range of –40°C to +125°C
- Available in SOIC-8 and VSSOP-8 packages
Applications
- Telecom Equipment
- Automotive Systems
- Power Management
- Solar Inverters
Q & A
- What is the offset voltage of the INA285AIDGKR? The offset voltage is ±20 μV.
- What is the common-mode rejection ratio (CMRR) of the INA285AIDGKR? The CMRR is 140 dB.
- What are the available gain options for the INA285AIDGKR? The INA285AIDGKR has a gain of 1000 V/V.
- What is the supply voltage range for the INA285AIDGKR? The supply voltage range is from 2.7 V to 18 V.
- What is the quiescent current of the INA285AIDGKR? The quiescent current is 900 μA (max).
- What is the operating temperature range of the INA285AIDGKR? The operating temperature range is from –40°C to +125°C.
- In what packages is the INA285AIDGKR available? It is available in SOIC-8 and VSSOP-8 packages.
- What are some typical applications of the INA285AIDGKR? Typical applications include telecom equipment, automotive systems, power management, and solar inverters.
- How does the zero-drift architecture benefit the INA285AIDGKR? The zero-drift architecture enables high accuracy and low offset voltage, making it suitable for precise current sensing.
- What is the maximum capacitive load for the INA285AIDGKR? The maximum capacitive load is 1 nF without sustained oscillation.
