BA3306

Overview

The BA3306 is a dual preamplifier with Automatic Level Control (ALC) designed for stereo radio-cassette recorders and tape recorders. It features two record/playback preamplifiers and an ALC circuit in a compact 9-pin SIP package. The device operates within a wide power supply voltage range of 4.5V to 14V with low current dissipation of 2.5mA. Key electrical characteristics include a high gain of 80dB, low distortion of 0.1%, and low noise of 1μVrms. The preamplifiers allow direct coupling to the tape head without external capacitors, preventing magnetization and pop noise.

Feature Summary

• Direct coupling capability eliminates the need for input coupling capacitors, preventing tape head magnetization and pop noise generation.
• Integrated power-on mute circuit suppresses pop noise during startup operations.
• ALC circuit provides good channel balance and large dynamic range, requiring only an external detector and time constant circuit.
• High gain and low distortion performance suitable for precise audio signal amplification.

Applications

• Stereo radio cassette players
• Tape recorders

Procurement Notes

Verify the specific package variant, as the BA3306-DX denotes a SIP-9 configuration. Confirm RoHS compliance status and lead times directly with ROHM or authorized distributors. Ensure the application environment stays within the recommended operating temperature range of -25°C to 75°C. Check for any specific ordering suffixes that may affect pinout or functionality before finalizing procurement.

Selection Notes

Select the BA3306 when designing stereo audio recording systems requiring integrated ALC and low-noise preamplification. Its direct-coupled architecture simplifies design by removing external coupling capacitors. Consider its 4.5V to 14V operating range for compatibility with various battery or line-powered audio equipment. The 9-pin SIP package offers a compact solution for space-constrained consumer audio devices.

Part Context

The BA3306 belongs to ROHM's audio IC portfolio, specifically targeting low-frequency small-signal amplification. It is part of a family of dual preamplifiers with ALC, sharing functional similarities with parts like the BA3308 and BA3311L. These components are widely used in consumer electronics for their ability to manage audio levels and reduce distortion in analog tape-based media systems.

Replacement Considerations

The BA3308 is a documented similar part from ROHM offering dual preamplifier with ALC functionality. Other potential substitutes include the BA3311L and BA3313L, which also feature dual preamplifiers with ALC circuits. Verify pin compatibility and electrical specifications against the original design requirements before substitution.