The model LM2902PWR is part of the Texas Instruments (TI) product lineup. It is a quad operational amplifier integrated circuit (IC) typically used in various analog signal processing applications.
Packaging Details:
The LM2902PWR comes in a TSSOP-14 package. TSSOP (Thin Shrink Small Outline Package) is a surface-mount package with a pin count of 14. It is commonly used in compact designs where space efficiency is a priority.
Pin Functions and Specifications:
Below is a detailed explanation of the pinout functions for the LM2902PWR with 14 pins:
Pin Number Pin Name Pin Function Description 1 Output (1) This is the output pin of the first operational amplifier (Op-Amp 1). It provides the amplified signal corresponding to the input. 2 Inverting Input (1) This is the inverting input (–) of the first operational amplifier (Op-Amp 1). It is used to apply the signal to be processed. 3 Non-Inverting Input (1) This is the non-inverting input (+) of the first operational amplifier (Op-Amp 1). It is used to apply the reference signal. 4 V− (Negative Power Supply) This pin connects to the negative side of the power supply (usually ground) for the IC's operation. 5 Output (2) This is the output pin of the second operational amplifier (Op-Amp 2). It provides the amplified signal corresponding to the input. 6 Inverting Input (2) This is the inverting input (–) of the second operational amplifier (Op-Amp 2). It is used to apply the signal to be processed. 7 Non-Inverting Input (2) This is the non-inverting input (+) of the second operational amplifier (Op-Amp 2). It is used to apply the reference signal. 8 V− (Negative Power Supply) This pin connects to the negative side of the power supply (usually ground) for the IC's operation. 9 Output (3) This is the output pin of the third operational amplifier (Op-Amp 3). It provides the amplified signal corresponding to the input. 10 Inverting Input (3) This is the inverting input (–) of the third operational amplifier (Op-Amp 3). It is used to apply the signal to be processed. 11 Non-Inverting Input (3) This is the non-inverting input (+) of the third operational amplifier (Op-Amp 3). It is used to apply the reference signal. 12 V− (Negative Power Supply) This pin connects to the negative side of the power supply (usually ground) for the IC's operation. 13 Output (4) This is the output pin of the fourth operational amplifier (Op-Amp 4). It provides the amplified signal corresponding to the input. 14 Inverting Input (4) This is the inverting input (–) of the fourth operational amplifier (Op-Amp 4). It is used to apply the signal to be processed.Pin Function Use Instructions:
The LM2902PWR is widely used in applications requiring multiple operational amplifiers, such as signal filtering, amplification, or active filtering circuits. Each of the four op-amps has two inputs (inverting and non-inverting), and the output is taken from the respective amplifier.
Power Supply Considerations: V+ (Pin 8): Connect to the positive side of the power supply (typically +5V to +36V). V− (Pin 4, Pin 8, Pin 12): Connect to the negative side of the power supply or ground.FAQ for LM2902PWR:
Q: What is the supply voltage range for the LM2902PWR? A: The supply voltage range for the LM2902PWR is from +3V to +32V (single supply) or ±1.5V to ±16V (dual supply).
Q: How many operational amplifiers are included in the LM2902PWR IC? A: The LM2902PWR contains four independent operational amplifiers.
Q: What is the maximum output voltage swing of the LM2902PWR? A: The maximum output voltage swing is typically V− + 1.5V to V+ − 1.5V for a 10kΩ load to ground.
Q: Is the LM2902PWR a low-power op-amp? A: Yes, the LM2902PWR is designed for low-power consumption, typically consuming only 1.1mA of current per amplifier.
Q: What is the typical input bias current for the LM2902PWR? A: The typical input bias current for each amplifier in the LM2902PWR is 100nA.
Q: Can the LM2902PWR be used in automotive applications? A: Yes, the LM2902PWR is rated for automotive use, with a wide operating voltage and temperature range.
Q: Does the LM2902PWR have rail-to-rail output? A: No, the LM2902PWR does not provide rail-to-rail output; however, it does offer a wide output voltage swing.
Q: What is the input voltage range for the LM2902PWR? A: The input voltage range is typically V− + 1.5V to V+ − 1.5V.
Q: Can the LM2902PWR be used in audio circuits? A: Yes, the LM2902PWR can be used in audio applications, as it is capable of handling both low-frequency and high-frequency signals.
Q: How can I configure the LM2902PWR as a comparator ? A: To configure the LM2902PWR as a comparator, connect the non-inverting input to a reference voltage, and the inverting input to the signal you want to compare.
Q: What is the recommended temperature range for the LM2902PWR? A: The LM2902PWR operates within a temperature range of −40°C to +125°C.
Q: What is the typical open-loop gain of the LM2902PWR? A: The typical open-loop gain of the LM2902PWR is 100,000.
Q: How do I protect the LM2902PWR from input overvoltage? A: To protect the LM2902PWR from input overvoltage, use clamping diodes to limit the input voltage to within the supply voltage range.
Q: What is the power consumption of the LM2902PWR? A: The LM2902PWR typically consumes 1.1mA of current per operational amplifier, with a total power consumption of about 4.4mA.
Q: Can I use the LM2902PWR in a feedback loop? A: Yes, the LM2902PWR is designed to work in a feedback loop, and it performs well in configurations such as inverting, non-inverting, or differential amplifiers.
Q: Can the LM2902PWR work with capacitive loads? A: The LM2902PWR is not specifically designed for high capacitive loads; it may exhibit stability issues with larger capacitive loads.
Q: What are the main differences between the LM2902PWR and the LM358 ? A: The LM2902PWR has a wider operating voltage range and a lower power consumption compared to the LM358 . Additionally, the LM2902PWR operates at a higher temperature range.
Q: Is the LM2902PWR suitable for high-speed applications? A: The LM2902PWR is a general-purpose op-amp and may not be the best choice for high-speed applications where low latency is required.
Q: Can I use the LM2902PWR in precision measurement systems? A: Yes, the LM2902PWR can be used in precision measurement systems as it has a low offset voltage and low drift.
Q: What should I consider when selecting the LM2902PWR for my circuit? A: When selecting the LM2902PWR, consider factors such as supply voltage, temperature range, bias current, and power consumption to ensure it meets your circuit's needs.
This provides a thorough explanation of the LM2902PWR pin functions, their uses, and the answers to 20 common questions. Let me know if you'd like further details or clarification!
