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The KA4558 is a dual operational amplifier manufactured by Fairchild Semiconductor. Below are the specifications, descriptions, and features based on factual information:

Specifications:

• Supply Voltage Range: ±3V to ±18V
• Input Offset Voltage: 2mV (typical)
• Input Bias Current: 500nA (typical)
• Input Offset Current: 100nA (typical)
• Common-Mode Rejection Ratio (CMRR): 80dB (typical)
• Supply Voltage Rejection Ratio (SVRR): 100dB (typical)
• Large Signal Voltage Gain: 100V/mV (typical)
• Output Voltage Swing: ±12V (min, at ±15V supply)
• Slew Rate: 1.5V/µs (typical)
• Gain Bandwidth Product: 3MHz (typical)
• Operating Temperature Range: -40°C to +85°C

Description:

The KA4558 is a monolithic dual operational amplifier designed for general-purpose applications. It features internal frequency compensation, high gain, and low noise, making it suitable for a wide range of analog circuits.

Features:

• Dual Op-Amp Configuration: Two independent amplifiers in a single package.
• No Frequency Compensation Required: Internally compensated for stable operation.
• Low Power Consumption: Optimized for efficiency in battery-operated devices.
• Wide Supply Voltage Range: Supports both single and dual power supplies.
• Short-Circuit Protection: Built-in protection against output short circuits.
• High Gain and Bandwidth: Suitable for audio, signal processing, and control applications.

This information is based on Fairchild Semiconductor's datasheet for the KA4558.