TL074CN circuit diagram & pinout | replacement & datasheet onsemi

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TL074CN Circuit Diagram

The TL074CN is a high-speed JFET-input quad operational amplifier designed for precision analog applications. The internal circuit diagram above illustrates the key building blocks that enable its low-noise, high-slew-rate performance and wide dynamic range.

At the core, the differential input stage utilizes high-impedance N-channel JFET transistors, which accept the input voltages (V_IN+ and V_IN−). These inputs are actively biased using a reference current source connected to the negative rail (V⁻), ensuring excellent DC stability and bias point control. The signal then flows through a gain stage, biased via V_BIAS1 and V_BIAS2, which helps maintain linearity and reduce crossover distortion.

This intermediate signal is fed into a Class AB output control circuit, which drives the final output stage. The Class AB architecture is chosen for its ability to deliver high output current while minimizing harmonic distortion and preserving efficiency.

Key Features and Benefits of TL074CN

1. Quad Op-Amp Configuration: Ideal for multi-channel analog signal paths in a single package.

2. Low Offset Voltage: Typically 1 mV, offering precision in signal amplification.

3. High Slew Rate: 20 V/μs, making it suitable for fast-switching audio and instrumentation signals.

4. Ultra-Low THD: Just 0.003% total harmonic distortion, excellent for professional audio and recording applications.

5. Wide Operating Temperature Range: C-suffix (TL074CN): Rated for 0°C to +70°C, ideal for commercial and consumer-grade applications.

6. Strong ESD Protection: Rated at 2 kV (HBM), protecting the IC in static-prone environments.

7. Integrated EMI/RFI Filters: Improves stability and accuracy in noisy electrical environments.

8. Single or Dual Power Supply Operation: Offers flexibility in circuit design from ±3 V to ±18 V.

Thanks to its robust design, low distortion, and fast response, the TL074CN is widely used in audio mixers, active filters, instrumentation amplifiers, and other precision analog applications.