TL072 High-Speed JFET-Input Dual Operational Amplifier

Overview

The TL072, TL072A, and TL072B are high-speed JFET-input dual operational amplifiers designed for a wide range of analog applications. These devices feature low noise, low input bias and offset currents, and high slew rates, making them ideal for precision signal conditioning, active filtering, and audio processing. The JFET input stage provides high input impedance, which is particularly beneficial for high-impedance sensor interfaces and buffering applications.

The TL072 series is part of a family of amplifiers known for their versatility and reliability in both industrial and consumer electronics. The devices are available in multiple package options, including PDIP, SOIC, and TSSOP, ensuring compatibility with various PCB layouts and assembly processes.

Features

• High Input Impedance: JFET input stage provides >10^12 Ω input impedance, minimizing loading effects on high-impedance sources.
• Low Noise: 18 nV/√Hz typical noise voltage at 1 kHz ensures clean signal amplification.
• Low Input Bias Current: 30 pA max (TL072B) reduces errors in high-impedance circuits.
• High Slew Rate: 13 V/µs enables fast signal response, suitable for audio and pulse applications.
• Wide Supply Voltage Range: ±5V to ±18V operation supports diverse system requirements.
• Low Harmonic Distortion: 0.003% typical at 1 kHz enhances audio fidelity.
• Dual Operational Amplifier: Two independent op-amps in a single package save board space.
• Extended Temperature Range: -40°C to +125°C operation for industrial environments.

Applications

The TL072 series is widely used in both professional and consumer electronics due to its robust performance characteristics. Key applications include:

• Audio Preamplifiers: Low noise and high slew rate make it ideal for microphone and line-level amplification.
• Active Filters: High input impedance and low distortion enable precise frequency shaping in analog signal processing.
• Instrumentation Amplifiers: Paired with precision resistors, the TL072 can form high-accuracy differential amplifiers.
• Analog-to-Digital Converter (ADC) Buffers: Minimizes signal degradation before digitization.
• Oscillators and Waveform Generators: Stable operation supports sine, square, and triangle wave generation.
• Medical Electronics: Used in ECG and EEG equipment due to low noise and high input impedance.
• Industrial Control Systems: Reliable performance in motor control and sensor signal conditioning.

Electrical Characteristics

Absolute Maximum Ratings

• Supply Voltage (Vcc): ±18V
• Input Voltage Range: ±15V
• Differential Input Voltage: ±30V
• Output Short-Circuit Duration: Continuous (with proper heat dissipation)
• Operating Temperature Range: -40°C to +125°C
• Storage Temperature Range: -65°C to +150°C

Typical Performance (Vcc = ±15V, TA = 25°C)

• Input Offset Voltage: 3 mV (TL072B), 6 mV (TL072)
• Input Bias Current: 30 pA (TL072B), 65 pA (TL072)
• Input Offset Current: 5 pA (TL072B), 15 pA (TL072)
• Common-Mode Rejection Ratio (CMRR): 100 dB
• Supply Voltage Rejection Ratio (PSRR): 100 dB
• Large-Signal Voltage Gain: 200 V/mV (RL = 2 kΩ)
• Slew Rate: 13 V/µs
• Gain Bandwidth Product: 3 MHz

Package Information

The TL072 is available in several industry-standard packages, providing flexibility for different design requirements:

8-Pin PDIP (Plastic Dual In-Line Package)

• Dimensions: 9.81 mm x 6.35 mm
• Pin Pitch: 2.54 mm
• Thermal Resistance (θJA): 100°C/W

8-Pin SOIC (Small Outline Integrated Circuit)

• Dimensions: 4.90 mm x 3.91 mm
• Pin Pitch: 1.27 mm
• Thermal Resistance (θJA): 160°C/W

8-Pin TSSOP (Thin Shrink Small Outline Package)

• Dimensions: 3.00 mm x 4.40 mm
• Pin Pitch: 0.65 mm
• Thermal Resistance (θJA): 240°C/W

Conclusion

The TL072 series of dual operational amplifiers combines high-speed performance with low noise and low power consumption, making it a versatile choice for a broad spectrum of analog applications. Its JFET input stage ensures minimal loading of high-impedance sources, while its robust electrical characteristics and multiple package options cater to both prototyping and high-volume production needs. Whether used in audio systems, medical devices, or industrial controls, the TL072 delivers reliable and precise signal amplification.