Overview
The INA331AIDGKR is a low-power, single-supply, CMOS instrumentation amplifier produced by Texas Instruments. It is part of the INA331 family, which offers wide-range, single-supply operation as well as bipolar-supply operation. This amplifier is designed for low-cost, low-noise amplification of differential signals and is suitable for a variety of applications, including industrial sensor amplifiers, physiological amplifiers, and signal conditioning for A/D converters. The INA331AIDGKR features a low quiescent current of 415µA, which drops to 0.01µA in shutdown mode, making it ideal for battery or multi-channel applications.
Key Specifications
| Parameter | Value |
|---|---|
| Package Type | VSSOP-8 |
| Pins | 8 |
| Operating Temperature Range (°C) | -55 to 125 |
| Gain Accuracy | G = 5, 0.02%, 2ppm/°C |
| Offset Voltage | ±250 µV |
| Common-Mode Rejection Ratio (CMRR) | 94dB DC, 50dB at 45kHz |
| Bias Current | 0.5pA |
| Bandwidth | 2.0MHz |
| Slew Rate | 5V/µs |
| Rail-to-Rail Output Swing | (V+) 0.02V |
| Quiescent Current | 490 µA max/channel |
| Shutdown Current | 0.01 µA |
Key Features
- Designed for low cost and high gain accuracy (G = 5, 0.02%, 2ppm/°C).
- Gain set with external resistors for gains greater than 5V/V.
- Low offset voltage: ±250 µV.
- High CMRR: 94dB DC, 50dB at 45kHz.
- Low bias current: 0.5pA.
- High bandwidth and slew rate: 2.0MHz, 5V/µs.
- Rail-to-rail output swing: (V+) 0.02V.
- Wide temperature range: -55°C to +125°C.
- Low quiescent current: 490 µA max/channel, and shutdown current of 0.01 µA.
Applications
- Industrial sensor amplifiers: Bridge, RTD, Thermocouple, Position.
- Physiological amplifiers: ECG, EEG, EMG.
- A/D converter signal conditioning.
- Differential line receivers with gain.
- Field utility meters.
- PCMCIA cards.
- Audio amplifiers.
- Communication systems.
- Test equipment.
- Automotive instrumentation.
Q & A
- What is the package type of the INA331AIDGKR?
The INA331AIDGKR comes in a VSSOP-8 package. - What is the operating temperature range of the INA331AIDGKR?
The operating temperature range is -55°C to +125°C. - What is the gain accuracy of the INA331AIDGKR?
The gain accuracy is G = 5, 0.02%, 2ppm/°C. - What is the offset voltage of the INA331AIDGKR?
The offset voltage is ±250 µV. - What is the common-mode rejection ratio (CMRR) of the INA331AIDGKR?
The CMRR is 94dB DC, 50dB at 45kHz. - What is the quiescent current of the INA331AIDGKR?
The quiescent current is 490 µA max/channel, and it drops to 0.01 µA in shutdown mode. - What are the key applications of the INA331AIDGKR?
Key applications include industrial sensor amplifiers, physiological amplifiers, A/D converter signal conditioning, differential line receivers, field utility meters, PCMCIA cards, audio amplifiers, communication systems, test equipment, and automotive instrumentation. - How does the INA331AIDGKR handle line noise and its harmonics?
The INA331AIDGKR rejects line noise and its harmonics because the common-mode error remains low even at higher frequencies. - Is the INA331AIDGKR suitable for driving A/D converters?
Yes, the INA331AIDGKR is ideal for directly driving sampling Analog-to-Digital (A/D) converters due to its high bandwidth and slew rate. - What is the shutdown current of the INA331AIDGKR?
The shutdown current is 0.01 µA.
