BA4558

Overview

The BA4558 is a dual operational amplifier IC featuring low power consumption and internal phase compensation. It offers high speed, wide bandwidth, and low noise characteristics. The device supports a supply voltage range of ±18V maximum, with typical quiescent current around 3mA. Key electrical parameters include a gain-bandwidth product of 2MHz, slew rate of 1V/µs, input offset voltage up to 6mV, and input bias current typically 60nA. Common-mode rejection ratio reaches 90dB. Operating temperature spans -40°C to +85°C.

Feature Summary

• Built-in output short-circuit protection circuit
• Internal phase compensation eliminates external components
• No latch-up effect ensures stable operation
• Wide common-mode and differential voltage range

Applications

• Active filters
• Audio amplifiers
• Voltage-controlled oscillators (VCOs)

Procurement Notes

Verify the specific package variant required for your design, as the BA4558 family includes DIP-8, SOP-8, and SIP-8 options. Confirm that the selected part meets the thermal dissipation requirements for your ambient temperature conditions, as power dissipation limits vary by package type. Ensure compatibility with existing 4558-based designs if performing a direct replacement.

Selection Notes

Select the BA4558 when a general-purpose dual op-amp with low power consumption and internal compensation is needed. Consider the BA4558F for surface-mount applications requiring an SOP package, or the BA4558N for single-in-line packaging. Verify that the 2MHz bandwidth and 1V/µs slew rate meet the signal processing requirements of the target application.

Part Context

The BA4558 belongs to a series of monolithic dual operational amplifiers designed for general-purpose electronic circuits. It is compatible with the standard 4558 operational amplifier architecture. The series provides high gain and low noise performance within a compact silicon chip, making it suitable for various analog signal processing tasks across consumer and industrial electronics.

Replacement Considerations

The BA4558 is compatible with the standard 4558 operational amplifier. Designers replacing other dual op-amps should verify pinout compatibility and ensure that supply voltage and thermal dissipation limits are not exceeded in the new configuration.