The TL072CDR is part of the Texas Instruments (TI) family of operational amplifiers. This specific model corresponds to an op-amp designed with low noise and low offset voltage, commonly used for various analog applications.
1. Package Type:
TL072CDR is in the SOIC-8 (Small Outline Integrated Circuit) package, which means it has 8 pins. The "DR" in the part number indicates the SOIC-8 package and Tape and Reel packaging.2. Pin Function List:
The TL072CDR is an operational amplifier with the following 8 pins and their functions:
Pin Number Pin Name Pin Function Description 1 Offset Null This pin is used to adjust the input offset voltage of the op-amp. It is typically connected to a potentiometer (or a similar adjusting component) to fine-tune the offset voltage. 2 Inverting Input (−) The inverting input of the operational amplifier. Signals applied to this pin will be inverted and amplified based on the gain configuration of the op-amp circuit. 3 Non-Inverting Input (+) The non-inverting input of the op-amp. This pin receives the signal to be amplified without inversion. 4 V− (Negative Supply) This is the negative supply voltage for the op-amp. It needs to be connected to a negative voltage rail (or ground for single-supply operation). 5 Offset Null This pin is used in conjunction with Pin 1 for adjusting the input offset voltage. 6 Output This pin provides the output of the operational amplifier. The amplified signal is available here, depending on the circuit configuration (closed-loop, open-loop, etc.). 7 V+ (Positive Supply) This pin connects to the positive supply voltage for the op-amp. It needs to be connected to a positive voltage rail (often a single positive voltage supply in many circuits). 8 NC (No Connection) This pin is not connected to anything internally and is not used in most configurations. It can be left unconnected or used as a secondary connection if necessary.3. Circuit Principle Instructions:
The TL072CDR is a dual operational amplifier. It is typically used in analog signal processing circuits, providing amplification, filtering, or signal conditioning. It operates with a dual power supply, providing high input impedance and low output impedance, making it versatile for various configurations, such as:
Inverting Amplifier: This configuration uses the inverting input pin (Pin 2) for signal input and applies feedback from the output to set the gain. Non-Inverting Amplifier: The non-inverting input pin (Pin 3) is used for input, and feedback from the output pin (Pin 6) to the inverting input controls the gain. Voltage Follower (Buffer): Using the non-inverting input for the input signal and connecting the output directly to the inverting input, the op-amp operates with a gain of 1. Differential Amplifier: When both the inverting and non-inverting inputs are used, the op-amp amplifies the difference between the two signals applied.For offset nulling, the TL072CDR provides two pins (1 and 5), which allow external adjustments to minimize the input offset voltage.
4. FAQ:
What is the package type of the TL072CDR? The TL072CDR is packaged in an SOIC-8 (Small Outline Integrated Circuit) form with 8 pins.
What are the typical uses of the TL072CDR? The TL072CDR is typically used in audio amplification, signal conditioning, filters , and active circuit applications requiring a low-noise op-amp.
How should I power the TL072CDR? The TL072CDR requires a dual power supply with a positive supply (V+) and a negative supply (V−).
What is the function of the offset null pins (Pins 1 and 5)? These pins are used to adjust the input offset voltage of the op-amp, ensuring accurate operation in high-precision applications.
What is the voltage range for the TL072CDR? The typical voltage range for the TL072CDR is ±3V to ±18V, or a single supply voltage of 6V to 36V.
Can I use the TL072CDR for audio applications? Yes, the TL072CDR is commonly used in audio amplifiers, thanks to its low noise characteristics.
What is the output impedance of the TL072CDR? The output impedance of the TL072CDR is typically around 50Ω, which makes it suitable for most signal applications.
What is the input impedance of the TL072CDR? The input impedance is typically around 1012Ω (1 TΩ), which is very high, making it suitable for high-impedance sources.
What is the gain-bandwidth product of the TL072CDR? The gain-bandwidth product of the TL072CDR is approximately 3 MHz, which is typical for a low-noise op-amp.
What is the typical current draw of the TL072CDR? The typical supply current is around 3 mA per amplifier.
Is the TL072CDR a rail-to-rail op-amp? No, the TL072CDR is not a rail-to-rail op-amp, so its output voltage will not reach the supply rails fully.
What is the maximum input voltage for the TL072CDR? The maximum input voltage should not exceed V+ or V−, typically limited to the supply voltage.
How should I connect the input pins? The inverting input (Pin 2) and the non-inverting input (Pin 3) should be connected to the signal sources with the correct feedback network for desired gain.
Can I use the TL072CDR in a single-supply configuration? Yes, the TL072CDR can be used in a single-supply configuration, but the negative supply pin (V−) should be connected to ground.
What is the typical offset voltage for the TL072CDR? The typical input offset voltage is around 3 mV.
What is the Slew Rate of the TL072CDR? The Slew Rate of the TL072CDR is typically 0.3 V/µs, which is suitable for many audio and control applications.
Is the TL072CDR suitable for precision applications? Yes, it is a precision operational amplifier with low offset voltage, making it suitable for accurate signal processing.
What are the recommended external components for use with the TL072CDR? Typically, you will need resistors and capacitor s for feedback and compensation, depending on the desired circuit configuration.
What is the maximum output swing for the TL072CDR? The output voltage typically swings within 2V of the supply rails, depending on the load and supply voltage.
Can the TL072CDR handle capacitive loads directly? The TL072CDR is not ideal for driving large capacitive loads directly. A buffer stage is recommended to prevent instability.
Conclusion:
The TL072CDR is a versatile, low-noise, dual operational amplifier in an SOIC-8 package. Its eight pins provide the necessary functionality for a variety of analog applications, with adjustable offset nulling for precision. It is commonly used in audio, signal processing, and sensor applications where low noise and high input impedance are critical.
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