What Is a TL072CD Amplifier?

What Is TL072CD?
The TL072CD is a practical and efficient dual operational amplifier that combines high-performance JFET and bipolar transistor technology into a single chip, making it both powerful and reliable. It boasts fast response speeds, low bias and offset currents, and minimal temperature influence on offset voltage. Simply put, this chip not only performs quickly but also remains exceptionally stable, making it an excellent choice for audio equipment, signal amplification, and various precision circuits.
Pinout of TL072CD
Pin 1 (Output 1): Amplified output of the first op-amp.
Pin 2 (Inverting Input 1): Inverting input for the first op-amp.
Pin 3 (Non-Inverting Input 1): Non-inverting input for the first op-amp.
Pin 4 (VCC-): Negative power supply.
Pin 5 (Non-Inverting Input 2): Non-inverting input for the second op-amp.
Pin 6 (Inverting Input 2): Inverting input for the second op-amp.
Pin 7 (Output 2): Amplified output of the second op-amp.
Pin 8 (VCC+): Positive power supply.
Circuit of TL072CD
The TL072CD's circuit principle is essentially about "boosting" electrical signals. It contains two independent operational amplifier cores, each responsible for processing and outputting signals. You can think of it as an audio amplifier—whether it's a faint audio signal or sensor data, it processes and amplifies the input, making the output stronger and more stable for further use.
The signal flow is straightforward. For the first op-amp, the signal enters through Pin 3 or Pin 2, gets processed by the internal amplification circuitry, and exits through Pin 1. The second op-amp works similarly: the signal enters through Pin 5 or Pin 6 and exits through Pin 7. Additionally, the chip’s essential operating power comes from Pin 4 and Pin, which are like its energy sources.
Specification of TL072CD
Slew Rate: 16V/µs
Gain Bandwidth Product: 3 MHz
Input Bias Current: 20 pA
Input Offset Voltage: 3 mV
Supply Current: 1.4mA
Output Current: 40 mA
Supply Span Voltage: 6 V ~ 36 V
Operating Temperature Range: 0°C ~ 70°C
Power Consumption: Typically 1.4mW/channel at ±15V
Package：8-SOIC
Features of TL072CD
Wide common-mode (up to VCC + ) and differential voltage range
Low input bias and offset current
Low noise en = 15 nV/√Hz (typ)
Output short-circuit protection
High input impedance JFET input stage
Low harmonic distortion: 0.01 % (typical)
Internal frequency compensation
Latch-up free operation
High slew rate: 16 V/µs (typ)
Where to Use TL072CD?
The TL072CD is perfect for applications requiring precise signal amplification with minimal noise and distortion. It shines in audio equipment like mixers and equalizers, where clean sound is essential. Additionally, it's a go-to choice for sensor signal conditioning in measurement systems, ensuring weak signals are amplified accurately. Its low power consumption and high-speed performance also make it ideal for active filters, analog computing, and other precision analog circuits in both industrial and consumer electronics.
How to Connect TL072CD?
Connecting the TL072CD is straightforward, much like building a signal amplification system. First, power the chip: connect pin 8 to the positive power supply (e.g., +12V) and pin 4 to the negative power supply (e.g., -12V). These two pins provide the power necessary for the chip to operate. Next, choose one of the operational amplifier cores to process your signal, such as the first op-amp. Connect the input signal to pin 3 (non-inverting input) or pin 2 (inverting input), depending on whether you need direct amplification or signal inversion.
Then, connect pin 1 (output) to a load, such as a speaker or a subsequent circuit. Don’t forget to place resistors and capacitors between the input and output to stabilize the signal and reduce noise. The second op-amp is connected similarly, with the input signals going to pins 5 or 6 and the processed signal output from pin 7. Throughout the process, just ensure the power supply voltage is within range and the input signal strength is appropriate to avoid overload. With these steps, the TL072CD will amplify your signals clearly and reliably!
Package of TL072CD
The TL072CD comes in an 8-SOIC package, a compact and widely used design. Its dimensions are approximately 4.9mm x 3.9mm, with a pin pitch of 1.27mm. The package has a height of around 1.75mm and is ideal for surface-mounted applications, providing a balance between size and ease of handling. This makes the TL072CD suitable for compact circuit designs, ensuring reliable performance while saving board space.
FAQs
What type of input does the TL072CD use?
It uses JFET inputs, which offer high impedance and low bias current, making it suitable for sensitive analog signals.
How many operational amplifiers are in the TL072CD?
It contains two independent op-amp cores within a single packag
What is the main difference between TL072, TL072A, and TL072B?
The difference lies in their precision levels. TL072B offers the highest precision, followed by TL072A, with TL072 providing standard performance.