BD37521FS-E2

Audio Special Purpose Overview

The BD37521FS-E2 is a 4-channel audio tone processor manufactured by ROHM Semiconductor. It features an integrated 2-band equalizer (Bass/Treble) and supports I2C interface control. The device operates within a supply voltage range of 7V to 9.5V and comes in a 24-SSOP-A package. Key specifications include a quiescent current of 38mA, THD+N of 0.001%, and output noise of 3.8µVrms. It provides independent volume control for 4 channels and includes loudness function support.

Audio Special Purpose Feature Summary

• 4-Channel Audio Tone Processor with Independent Volume Control
• Integrated 2-Band Equalizer (Bass/Treble) requiring no external components
• I2C Bus Interface for Digital Control
• Low Distortion: 0.001% THD+N
• Supply Voltage Range: 7.0V to 9.5V
• Loudness Function Support

Audio Special Purpose Applications

• Consumer Audio Systems
• Standard Home Audio Equipment
• Audio Tone Processors

Audio Special Purpose Procurement Notes

Verify the specific ordering suffix against the manufacturer's datasheet to ensure compatibility with required packaging options such as Tape & Reel (Standard Package: 2,000). Confirm that the 24-SSOP-A package dimensions align with the target PCB footprint. Ensure the I2C address configuration matches the system design requirements before finalizing procurement.

Audio Special Purpose Selection Notes

Select this component when a compact solution for multi-channel audio tone management is required. The integrated bass and treble filters reduce external component count compared to discrete solutions. Verify that the 7V to 9.5V supply voltage range fits the system power architecture. Consider the 38mA quiescent current if power efficiency in standby modes is a critical constraint. Note: This product is not recommended for use in automotive equipment.

Audio Special Purpose Part Context

This part belongs to the BD375xx series of audio ICs from ROHM, designed for sound processing applications where software and circuit board commonality are prioritized. It shares functional similarities with other models in the family but is distinguished by its specific channel count (4 outputs, 3 stereo inputs) and integrated tone control features. The E2 suffix typically denotes environmental compliance or specific manufacturing revisions.