مدار مجتمع (آی سی) آی‌سی صوتی ویژه

Product Attributes

Introduction

BD37521FS is a sound processor with built-in 2-band equalizer for car audio. Other features are stereo 4ch input selector, input-gain control, main volume, loudness, and a 4ch fader volume. It is equipped with an “Advanced switch circuit”, which is an original ROHM technology that reduces various switching noise (ex. No-signal, low frequency such as 20Hz & large signal inputs). Also, this “Advanced switch” makes control of microcomputer easier and can be used for designing high quality car audio system.

Features

• Reduced switching noise of input gain control, mute, main volume, fader volume, bass, treble, and loudness by using advanced switch circuit.
• Built-in 1 differential input selector and 3 single-ended input selectors
• Built-in ground isolation amplifier inputs which is ideal for external stereo input.
• Built-in input gain controller which reduces switching noise for volume of a portable audio input.
• Lesser number of external components due to built-in 2-band equalizer filter. This makes it possible to control the Gv of 2-band equalizer and Gv of loudness by I²C BUS.
• A gain adjustment quantity of ±20dB with a 1 dB step gain adjustment is possible for the bass and treble.
• Energy-saving design resulting in low current consumption is achieved by utilizing the BiCMOS process. It has the advantage in quality over scaling down the power heat control of the internal regulators.
• Input pins and output pins are organized and separately laid out to keep the signal flow in one direction that consequently simplify pattern layout of the set board and decrease the board dimensions.
• It is possible to be controlled by a 3.3V / 5V I²C BUS.

Applications

• It is best suited for car audio applications.
• It is also suitable for other audio equipment such as mini-component, micro-component, television, etc.