990C

The Hardy Instruments 990C Discrete Operational Amplifier is a high-performance analog circuit component designed for various applications where superior signal gain and accuracy are required. This op-amp is known for its discrete design, which sets it apart from integrated circuits, offering a more straightforward and transparent signal path.

The 990C Discrete Operational Amplifier is a dual amplifier, meaning it contains two independent amplifying circuits within a single package. Each amplifier circuit features a common emitter input stage, followed by a common collector differential stage, and finally a common collector output stage. This multistage design provides excellent gain, high input impedance, and low output impedance.

One of the most notable features of the Hardy 990C is its extremely low noise floor. This is achieved through the use of high-quality discrete components and careful circuit design. The amplifier's noise floor is typically around 1.5 nV/ Hz, making it an excellent choice for applications where low noise is essential, such as in instrumentation, precision measurement, and signal conditioning.

The 990C Discrete Operational Amplifier also boasts a high common-mode rejection ratio (CMRR) of over 100dB, ensuring that common-mode noise is effectively rejected, and the amplifier's output is largely unaffected by such noise sources. Additionally, the amplifier has a high power bandwidth of 3MHz, ensuring that it can handle and respond to input signals with a wide range of frequencies.

The Hardy 990C Discrete Operational Amplifier is housed in a standard 8-pin mini DIP package, making it easy to use in a variety of applications. The amplifier can be powered from a single supply voltage, with a recommended range of 10V to 32V. The input voltage range is specified as 2V p-p for grounded input configurations, and 4V p-p for floating input configurations. The output voltage swing is typically 12V p-p into a 2k load.

The 990C Discrete Operational Amplifier is an ideal choice for applications where high accuracy, low noise, and high gain are essential, including voltage followers, instrumentation amplifiers, and precision amplifiers. Its discrete design and high performance make it a versatile and reliable component for analog signal processing applications.

The Hardy Instrumentations 990C Discrete Operational Amplifier is a popular choice among audio enthusiasts and electronics hobbyists due to its high-quality discrete design. Let's discuss the pros and cons of buying this op-amp to help you make an informed decision.

1. Discrete Design: The Hardy 990C uses discrete transistors instead of integrated circuits, which results in better sound quality and reduced distortion.

2. Low Distortion: This op-amp has extremely low distortion, making it suitable for high-fidelity audio applications.

3. Wide Bandwidth: With a bandwidth of up to 1.5MHz, the 990C can handle a wide range of audio frequencies.

4. Low Power Consumption: This op-amp consumes very little power, making it an excellent choice for battery-powered applications.

5. High Input Impedance: The 990C has a high input impedance of 10M , which ensures that it doesn't load down the source.

6. Low Noise: This op-amp has a low noise floor, which is essential for accurate audio measurement and signal processing.

1. Cost: The Hardy 990C is more expensive than many integrated op-amps due to its discrete design and high-quality components.

2. Sensitivity to Power Supply Voltage: This op-amp requires a stable power supply to function optimally, and any voltage fluctuations can affect its performance.

3. Limited Availability: Due to its popularity, the Hardy 990C can be difficult to find in stock, and it may take some time to source one.

4. Complexity: Discrete op-amps can be more complex to design and build than integrated op-amps, which may require additional expertise and resources.

The Hardy Instrumentations 990C Discrete Operational Amplifier offers exceptional sound quality, low distortion, and high-frequency response, making it an excellent choice for high-fidelity audio applications. However, its discrete design and high cost may make it less accessible to some hobbyists and electronics enthusiasts. If you prioritize audio quality and are willing to invest in a high-performance op-amp, the Hardy 990C is an excellent choice.

If you're looking for a high-performance op-amp for audio applications and have the budget for it, the Hardy Instrumentations 990C Discrete Operational Amplifier is an excellent choice. However, if cost is a concern, you may want to consider other high-quality integrated op-amps that offer similar performance at a lower cost. Ultimately, the best op-amp for your application depends on your specific requirements and budget.

Details:

If you want superior sound quality, the 990C can provide it. Many improvements in components were made. See technical information sheet for details. The 990C is used in the most critical audio applications.

The 990C discrete op-amp is among the finest op-amps available for audio applications. Leading recording studios, remote companies, disc and CD/DVD mastering facilities, TV radio stations use the 990C for superior performance.

specifications audioproequip:

• brand: John Hardy
• mpn: 990c
• type: Microphones

offer audioproequip:

• options: ship-to-home
• sold #: 9
• started: december 5, 2025
• availability: in stock
• price: $199.00
• item condition: Used

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