BD3487FS-E2 Sound Processor with Equalizer | ROHM
部品番号: BD3487FS-E2 ✓ 生産中BD3487FS-E2 概要
An audio sound processor is an application-specific integrated circuit that manages gain, tone, and other signal-conditioning functions within an audio path. Unlike a general-purpose operational amplifier, which performs linear amplification with externally configured feedback, the BD3487FS-E2 integrates processing functions intended to reduce the component count and board area required for multi-band audio systems. It belongs to the broader hierarchy of audio interface ICs, signal-processing ICs, and semiconductor amplifiers.
The principal documented characteristics of the BD3487FS-E2 include its sound-processor and equalizer positioning, a 32-pin SSOP-A package, and a 0.8 mm package pitch indication reported in distributor documentation. Because the accessible manufacturer documentation covers the base BD3487FS device while ordering-code details distinguish the -E2 version, engineers should confirm electrical ratings, pin functions, and control logic against the BD3487FS datasheet and the manufacturer product information before releasing a layout.
The integrated equalizer role is the key technical distinction for this device. A fixed or adjustable equalizer can correct frequency-dependent response, flatten source material, compensate for speaker or cabinet characteristics, or create preset tonal curves. When implemented in the BD3487FS-E2, this processing can reduce the number of discrete filters and surrounding passive networks normally required for those tasks, while keeping the audio routing predictable within one package.
Typical application areas include home-audio receivers, compact stereo systems, personal audio equipment, powered speakers, and other products that require local tone control before a downstream amplifier stage. The device can also be evaluated in multi-zone audio equipment where several source paths need consistent sound shaping. System-level performance still depends on the surrounding analog network, external component selection, grounding, and the behavior of the downstream power amplifier.
For PCB design, the 32-pin SSOP-A footprint requires careful escape routing because the fine pitch limits component access and trace spacing. Place the equalizer-related external components close to their associated pins, maintain a continuous ground reference beneath the analog section, and separate the audio input region from noisy power-conversion stages. Prototype and measure the complete signal chain, including channel separation, gain stability, frequency response, and distortion.
This page consolidates the verified product identity, package information, distributor records, application guidance, and design considerations for BD3487FS-E2. It also distinguishes confirmed characteristics from electrical parameters that must be taken directly from the manufacturer datasheet, helping engineers plan sourcing and hardware development without relying on unverified substitute parts.
ドロップイン代替品: BD3487FS-E2 — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
この製品に利用可能なドロップイン代替品はありません。
代替品をリクエストBD3487FS-E2 最大定格＆電気的特性
| Product Type | Sound processor with equalizer |
| Manufacturer | ROHM Semiconductor |
| Device Category | Audio amplifier / audio interface IC |
| Package Type | 32-pin SSOP-A |
| Package Pin Count | 32 pins |
| Package Pitch | 0.8 mm |
| 実装タイプ | Surface mount |
| Ordering Code | -E2 |
| Silicon Technology | Silicon monolithic integrated circuit |
| Signal Processing | Audio sound processing with equalizer functions |
BD3487FS-E2 0.8 mm ピン配置ガイド
BD3487FS-E2 (0.8 mm パッケージ) のピン配置。 このアナログコンポーネントは、入力、出力、および電源ピンを備えています。オフセットナル、補償、イネーブルピンの設定については、メーカーのデータシートを参照してください。信号調整やアンプ回路に最適です。
詳細なピン配置データはありません: BD3487FS-E2.
詳細は データシート をご参照ください。
主な用途
BD3487FS-E2 の用途: 6 件s: Home Stereo Receiver Tone Control, Powered Speaker Input Conditioning, Multi-Zone Audio Distribution, Personal Audio Signal Conditioning, Audio Equalizer Module, Legacy Audio Equipment Restoration.
Home Stereo Receiver Tone Control
The BD3487FS-E2 fits the tone-control stage of a home stereo receiver because its sound-processor function includes equalizer capabilities for shaping low-, mid-, and high-frequency response. Position the device ahead of the main power amplifier so that the source is conditioned before the final output stage. This approach can replace several discrete filter networks and reduce the number of signal-path connections. Because the exact band count and control method are not confirmed without the BD3487FS datasheet, validate the control interface and external resistor network during schematic review, then verify channel balance and stability on the first prototype.
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Powered Speaker Input Conditioning
The BD3487FS-E2 can be evaluated in a powered speaker where bass, presence, and treble adjustment must occur before a power-amplifier module. Its equalizer function provides local signal conditioning without requiring a separate filter board, which is useful in compact enclosures where PCB area is constrained. The -E2 ordering code uses a 32-pin SSOP-A package, so the analog input section needs careful trace escape and a nearby solid ground plane. Confirm input impedance, maximum signal level, and channel separation from the manufacturer datasheet before committing to a production board.
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Multi-Zone Audio Distribution
A multi-zone audio product can use the BD3487FS-E2 to apply consistent tonal correction before a signal is distributed to several listening areas. Processing the source centrally reduces the need to duplicate equalizer circuits in every output channel and helps maintain similar perceived response across rooms. The sound processor is best placed at a stable line-level point where it will not be affected by downstream volume-control changes. Validate crosstalk, gain distribution, and ground isolation during system testing, particularly because the fine-pitch SSOP-A footprint limits access to inner pins during rework.
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Personal Audio Signal Conditioning
The BD3487FS-E2 is suitable for evaluation in personal-audio equipment that requires fixed or adjustable tone shaping ahead of a headphone or portable-speaker amplifier. Integrating equalization close to the audio source can improve consistency across different source devices and reduce reliance on software-only correction. The device must remain within its documented input range and operate from the specified analog supply. Because the package uses a 32-pin SSOP-A layout with a reported 0.8 mm pitch, plan the board footprint from the manufacturer mechanical drawing and keep sensitive audio traces short.
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Audio Equalizer Module
The BD3487FS-E2 can serve as the core of a dedicated analog equalizer module inserted into a mixer, amplifier, or active-speaker design. Its integrated sound-processing function allows a board designer to implement tonal control without recreating a multi-section analog network. The -E2 ordering code is distributed as a 32-pin SSOP-A part, so external frequency-setting components should be placed according to the manufacturer application guidance. Confirm whether the equalizer is fixed or adjustable, and verify gain interaction between adjacent bands, before defining the user interface.
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Legacy Audio Equipment Restoration
The BD3487FS-E2 is a practical candidate when restoring an audio product that originally used the ROHM BD3487 sound processor. Matching the known IC rather than substituting a generic filter can preserve the original control scheme and expected tonal behavior. Start by identifying the existing package footprint, supply rails, input level, and equalizer-control connections from the equipment service documentation. Compare those findings with the BD3487FS manufacturer datasheet before assembly. This application also benefits from checking the -E2 ordering code and the reported 0.8 mm package pitch to avoid mechanical mismatches.
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おすすめ製品の概要
エンジニアリング参考データ: BD3487FS-E2 — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 |
|---|---|
| Package | 32-pin SSOP-A |
| Brand | ROHM Semiconductor |
| Device Function | Sound processor with equalizer |
| Package Pin Count | 32 pins |
| Package Pitch | 0.8 mm |
| Mounting Type | Surface mount |
| Silicon Construction | Silicon monolithic integrated circuit |
| Ordering Code | -E2 |
設計ノート
Route the 32-pin SSOP-A footprint using the mechanical drawing in the BD3487FS manufacturer datasheet, not a generic 32-pin SSOP footprint. The reported 0.8 mm pitch leaves limited space for probe access and component placement, so reserve solder-bridge and component-rework clearances on the two inner pin rows. Keep frequency-setting components near their associated pins and use uninterrupted ground planes under the analog section.
Place the BD3487FS-E2 after the source-selection stage and before the main volume or power-amplifier stage so that equalization operates at a predictable, low-level signal amplitude. Maintain short traces for audio inputs and outputs, isolate the analog ground current from switching-converter return paths, and avoid routing the audio path adjacent to high-current inductor connections. Validate inter-channel level matching with a tone sweep during prototype testing.
Do not treat the base BD3487FS designation as proof that every ordering-code variant has identical logistics or lifecycle status. Confirm that a replacement is specifically BD3487FS-E2, and validate the 32-pin SSOP-A lead pitch, row spacing, and board orientation before ordering components. Use the manufacturer pin table to identify analog supplies, ground connections, equalizer-control pins, and signal inputs; assigning these functions by position alone can damage the device.
コンプライアンス情報
The indexed product records identify ROHM Semiconductor as the manufacturer but do not state the specific compliance declarations for BD3487FS-E2. Confirm RoHS, REACH, halogen-free, and conflict-minerals documentation with the manufacturer before release to a regulated market.
