LM301AN Operational Amplifier: Equivalent, Circuit and Package

Ⅰ. What is LM301AN？

Ⅱ. Symbol, footprint and pin connection of LM301AN

Ⅲ. Technical parameters

Ⅳ. LM301AN tone control circuit

Ⅴ. Features of LM301AN

Ⅵ. What is the difference between LM301AN and LM709?

Ⅶ. Package of LM301AN

Ⅷ. Application of LM301AN

Ⅸ. What issues should be paid attention to when applying LM301AN?

LM301AN is a versatile operational amplifier that employs advanced technology to effectively manage input current. Additionally, through an optimized bias circuit design, it substantially reduces the temperature-related drift in input current. The LM301AN boasts a voltage gain of 100dB and operates within a temperature range of 0°C to 70 °C. It excels in high-impedance circuits, offering enhanced precision and reduced noise. Its low input current feature makes it well-suited for applications like long-interval integrators, timers, sampling and holding circuits, and low-frequency waveform generators. Notably, in comparison to the traditional IC operational amplifier input matching transistor to buffer circuit approach, the LM301AN delivers lower offset voltage and drift at a lower cost, leading to significant enhancements in overall system performance and stability.

Replacement and equivalent：

• KA301A

• LM201AN

• LM301AN/NOPB

• LM301ANG

The LM301AN typically comes in an 8-pin DIP (Dual Inline Package) and has the following pinout configuration:

Pin 1: Offset Null

Pin 2: Inverting Input (-)

Pin 3: Non-Inverting Input (+)

Pin 4: V- (Negative Power Supply)

Pin 5: Offset Null

Pin 6: Output

Pin 7: V+ (Positive Power Supply)

Pin 8: NC (No Connection)

This circuit uses negative feedback to achieve tone control, so that the audio signal can obtain better sound performance after being processed by the RC network. Two potentiometers with model DS166 and resistance value 100kΩ are used in the circuit. With treble and bass adjustment functions, it can easily process audio signals. This circuit uses the general-purpose integrated operational amplifier LM301AN as the core component to form a high-quality tone control circuit.

• High input impedance: Its input impedance is very high, usually above 100 MΩ, which means that it will not cause too much loading effect on the input signal.

• Low distortion: It usually has low distortion characteristics and is suitable for high-quality signal amplification applications.

• Bias circuit design optimization: The redesigned bias circuit reduces the temperature drift of the input current, allowing the operational amplifier to maintain stable performance in different temperature environments.

• Low input bias current: The input bias current of LM301AN is very low, which helps reduce errors and improve circuit stability.

• Single power supply operation: LM301AN can operate from a single positive power supply, usually the operating voltage range is 5V to 30V.

• High gain: It has high gain, usually between 10,000 and 200,000, which makes it suitable for signal amplification.

In terms of swing frequency, the conversion rate of LM301AN is higher than that of LM709, so it is more suitable for occasions with higher signal processing requirements.

In terms of gain bandwidth multiplication, the GBW of LM301 AN is generally higher than that of LM709, indicating that it can handle higher frequencies in a certain gain structure.

In terms of supply voltage, the LM301AN has a wide supply voltage range and can operate with supply voltages as low as 4V and as high as 36V. The voltage range of the LM709 is more limited, and its operating supply voltage is usually 6 to 20 volts.

The package of LM301AN is PDIP-8, and the specific size is 0.300 inches (7.62mm). This package allows the LM301AN integrated circuit to be directly inserted into a printed circuit board with a corresponding slot, thereby facilitating circuit board assembly and maintenance. At the same time, PDIP-8 is also a widely used integrated circuit package method, with high popularity and good compatibility.

• Oscillator: LM301AN can be used to generate sine waves, square waves or other waveforms under a feedback network as part of an oscillator.

• Lighting: In the lighting control system, in order to realize automatic control of lighting, we need to use the LM301AN operational amplifier to process the light signal.

• Signal amplifiers: It can be used as a signal amplifier to amplify weak input signals to a larger amplitude, such as audio amplifiers, instrument amplifiers, etc.

• Automotive electrification: In the vehicle's power management system, battery management system, and motor drive system, we all use operational amplifiers to amplify and process signals. LM301AN has good working performance and working stability and can meet the needs of the automotive electrification field.

• 5G communication: 5G communication technology needs to process high-frequency signals, but due to the increased frequency band of signal transmission, it is susceptible to interference. In order to improve the quality and reliability of the signal, we need to amplify, filter, mix and other processes on the signal. LM301AN, combined with other circuit components, can achieve high-performance, low-noise, and low-distortion signal processing, thereby improving the reliability and stability of 5G communication transmission.

First of all, we need to take circuit protection measures to prevent overcurrent, overvoltage and other abnormal conditions from causing damage to the chip. Secondly, when using an op amp, we need to connect the negative pole to the ground wire to form a complete circuit loop. If the negative terminal is not connected to ground, the op amp will not function properly. Additionally, op amps require a stable supply voltage to function properly. If the supply voltage fluctuates or is unstable, the performance of the op amp will be degraded or even damaged. To ensure stable supply voltage, we should use a stable power chip. Finally, we should also pay attention to avoid overload saturation and choose an appropriate internal resistance of the signal source to ensure that the operational amplifier can operate normally.

Frequently Asked Questions

1. What is the operating temperature range of LM301AN?

The operating temperature of LM301AN ranges from 0°C to 70 °C. 

2. What is LM301AN?

The LM301AN is a general purpose operational amplifiers which feature improved performance over industry standards. Advanced processing techniques make possible an order of magnitude reduction in input currents, and a redesign of the biasing circuitry reduces the temperature drift of input current.

3. What is the equivalent of LM301AN?

You can replace the LM301AN with the KA301A, LM201AN, LM301AN/NOPB, LM301ANG.

4. What is the purpose of the Offset Null pins (1 and 5)?

The Offset Null pins are used to adjust and nullify any offset voltage that may be present at the amplifier's inputs, helping to minimize DC voltage errors in the amplification process.