BD34704KS2

Audio Special Purpose Overview

The BD34704KS2 is an 8-channel audio signal processor from ROHM's MUS-IC series, housed in an 80-SQFP (SQFP-T80C) package. It operates on a single supply voltage of 6.5V to 7.5V with a typical quiescent current of 32 mA. The device features independent volume control for 8 channels with a range of +32 dB to -95 dB and 0.5 dB steps. It includes a built-in input selector supporting up to 12 channels (expandable to 18), and supports Zone 3 output. The THD+N is typically 0.0004% (approx. 108 dB SNR), and it uses a 2-wire serial interface compatible with 3.3V or 5V logic levels.

Audio Special Purpose Feature Summary

• MUS-IC technology with micro-step volume control to minimize switching pop noise
• 8 independent volume channels with 0.5 dB step resolution
• Built-in input selector supporting up to 12 channels (expandable to 18)
• Supports Zone 3 output with independent sub-volume control
• 2-wire serial bus control corresponding to 3.3V/5V

Audio Special Purpose Applications

• High-quality consumer audio systems
• Home theater receivers
• Multi-zone audio distribution units

Audio Special Purpose Procurement Notes

Verify the specific ordering suffix and packaging configuration against the manufacturer's latest datasheet before procurement. Confirm that the application environment does not require automotive qualification, as this standard-grade component is explicitly not recommended for vehicle-mounted equipment. Ensure design compatibility with the specified 6.5V to 7.5V single power supply rail.

Audio Special Purpose Selection Notes

Select this component for applications requiring high-fidelity multi-channel volume adjustment with minimal distortion. The 80-SQFP package requires surface-mount assembly capabilities. Designers must account for the 32 mA quiescent current draw and ensure adequate thermal management within the -40°C to +85°C operating temperature range. Verify that the host controller can support the required 2-wire serial interface protocol.