The BA4558 is a dual operational amplifier integrated circuit commonly used in various analog applications. Here are some key details about the BA4558, along with typical applications and characteristics:

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Key Features:

1. Dual Operational Amplifiers: The BA4558 contains two independent, high-gain, frequency-compensated operational amplifiers.
2. Package Type: It is typically available in an 8-DIP (Dual In-Line Package) configuration, which makes it suitable for through-hole mounting.
3. Wide Supply Voltage Range: The BA4558 operates over a wide supply voltage range, typically from ±2V to ±18V.
4. High Input Impedance: It has a high input impedance, which allows it to interface with many signal sources without loading them down.
5. Low Noise: The operational amplifier is designed to operate with low noise, making it suitable for audio and other signal processing applications.
6. Bandwidth: Typically, the unity-gain bandwidth is around 1 MHz, which is adequate for many general-purpose applications.
7. Low Input Offset Voltage: The input offset voltage is relatively low, which is beneficial in precision applications.

Typical Applications:

1. Signal Conditioning: Used to amplify weak signals in sensor applications or audio systems.
2. Filters: Can be configured to create low-pass, high-pass, band-pass, and notch filters.
3. Comparators: While it's primarily an op-amp, it can be used in comparator circuits with appropriate hysteresis.
4. Voltage Followers: Used as a buffer to provide high input impedance and low output impedance.
5. Integrators/Differentiators: Useful in analog computing applications.
6. Feedback Amplifiers: Commonly employed in applications requiring feedback control.

Example Circuit:

Here's a simple application of the BA4558 in a non-inverting amplifier configuration:

1. Components:

• BA4558 IC
• Resistors (R1 and R2 for gain setting)
• Source voltage (Vs)
• Load (e.g., speaker or other devices)

General Specifications

• Type: General Purpose Operational Amplifier
• Number of Circuits: 2 (Dual)
• Package: 8-DIP (Dual In-line Package)
• Slew Rate: 1.2 V/μs
• Gain Bandwidth Product: 2 MHz
• Input Bias Current: 60 nA

Features

• The BA4558 is designed for a variety of applications, including signal amplification and filtering.
• It offers low noise and high stability, making it suitable for both consumer and industrial electronics.
• The IC is characterized by its low input offset voltage and high open-loop gain.

1. Configuration:

• Connect the input signal to the non-inverting input (+) of one op-amp in the BA4558.
• Connect a resistor (R1) from the output to the inverting input (-) and another resistor (R2) from the inverting input to ground to set the gain.
• The gain (Av) is determined by the formula: ( Av = 1 + frac{R2}{R1} ).

The BA4558 is a versatile and widely used dual op-amp that is suitable for numerous applications in audio, signal conditioning, and control systems. When designing circuits with the BA4558, make sure to refer to the datasheet for specific electrical characteristics and application information.

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