BD3403FV-E2 - 2-Channel Audio Signal Processor | ROHM
部品番号: BD3403FV-E2 ⚠ ラストタイムバイBD3403FV-E2 概要
An audio signal processor is an analog IC that conditions multiple audio channels through volume, tone, balance, or equalization functions before the signal reaches amplifiers and speakers. In the broader hierarchy, it belongs to the audio processor and analog signal-conditioning IC category within audio and video semiconductors. Its role is to provide local channel control and tonal shaping while preserving compatibility with conventional analog audio signal paths.
The BD3403FV-E2 is a 2-channel device with a 40-SSOPB package. Its operating supply range of 6.5 V to 9.5 V suits powered audio equipment, while the resistance-ladder implementation is intended to provide low-noise, low-distortion volume and tone adjustment. Soft-switch circuitry is specifically intended to reduce shock sound when switching functions occur. The manufacturer describes the device as using the BiCOMS process with low power consumption.
The signal-processing architecture separates front-volume and rear-volume stages. This two-stage arrangement is intended to improve signal-to-noise ratio while allowing separate control of surround and rear channels. The built-in 3-band equalizer provides bass, mid, and treble adjustment, making the device appropriate for systems requiring multiple tonal controls rather than a simple passive volume network.
Typical applications include home-theater receiver channel control, surround-sound preamplifier circuitry, automotive audio head units, and powered stereo systems. In a home-theater design, the processor can sit between source-level audio inputs and power amplifiers, allowing independent channel-level and tonal adjustments. Automotive use is also conceptually aligned with the 6.5 V to 9.5 V supply range, although qualification and environmental requirements must be checked separately.
When laying out the circuit, follow the manufacturer pin-description table for the 40-SSOPB footprint and keep the analog signal path short and away from switching-power nodes. Confirm the exact external component network, recommended decoupling, and control-interface implementation in the manufacturer datasheet before production release. The product page identifies the BD3403FV family as discontinued, so lifecycle planning should include last-time-buy assessment.
This page combines the manufacturer product description with distributor package and lifecycle information, then adds application guidance, design cautions, and a structured comparison for engineers evaluating the BD3403FV-E2.
ドロップイン代替品: BD3403FV-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。
BD3403FV
✅ ドロップイン📋 参考代替品（カタログ未掲載）
BD3403FV-E2 最大定格＆電気的特性
| Product Type | 2-channel audio signal processor |
| 動作電源電圧 | 6.5 V to 9.5 V |
| Channel Count | 2 channels |
| Equalizer Bands | 3 bands: bass, mid, and treble |
| Volume Architecture | 2-stage front-volume and rear-volume configuration |
| Rear and Surround Control | Yes |
| Soft-Switching | Yes; designed to reduce shock sound during switching |
| Volume and Tone Circuit | Resistance-ladder circuit |
| Signal-to-Noise Objective | High S/N through the 2-stage front-volume and rear-volume configuration |
| Process Technology | BiCOMS process |
| Power Consumption | Low-consumption implementation |
| パッケージ | 40-SSOPB |
| 実装タイプ | Surface mount |
| Product Description | Sound processor with built-in 3-band equalizer |
| ライフサイクル状態 | Last Time Buy; discontinuation announced |
BD3403FV-E2 40-ssopb ピン配置ガイド
BD3403FV-E2 (40-ssopb 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: BD3403FV-E2.
詳細は データシート をご参照ください。
主な用途
BD3403FV-E2 の用途: 6 件s: Home-Theater Surround Processing, Automotive Audio Head Units, Powered Stereo Amplifier, Multichannel Active Speaker System, Analog Radio and Media Player, Audio Production and Recording Monitor.
Home-Theater Surround Processing
The BD3403FV-E2 fits home-theater preamplifier and receiver circuitry requiring separate surround and rear-volume control. Its 2-channel architecture processes the designated left and right channels through the built-in bass, mid, and treble equalizer, while the two-stage front-volume and rear-volume configuration is intended to improve signal-to-noise ratio. The 6.5 V to 9.5 V operating range is suitable for powered analog audio equipment. Place the processor before the power-amplifier stages, keep the audio traces short, and follow the manufacturer application circuit for bypass capacitors and control resistors.
おすすめ
Automotive Audio Head Units
The BD3403FV-E2 can support channel-level and tonal adjustment in analog automotive head-unit signal paths. Its 6.5 V to 9.5 V supply range is compatible with common powered-audio rails, and the built-in 3-band equalizer provides bass, mid, and treble controls without requiring three separate passive networks. The resistance-ladder volume and tone implementation is intended for low-noise, low-distortion operation. Automotive deployment still requires confirmation of temperature grade, vibration environment, and any automotive qualification, because the manufacturer identifies the family as Last Time Buy.
おすすめ
Powered Stereo Amplifier
The BD3403FV-E2 is suitable for the pre-amplifier section of a powered stereo system requiring two-channel level and tone control. Its built-in three-band equalizer supports bass, mid, and treble adjustment, while the separate front-volume and rear-volume stages provide a structured signal path for surround or rear outputs. Because the device operates from 6.5 V to 9.5 V, the system supply must provide adequate headroom. Use short analog traces, decouple the supply close to the IC, and validate the output signal range before connection to power-amplifier inputs.
おすすめ
Multichannel Active Speaker System
The BD3403FV-E2 can provide local volume and equalization in an active multichannel speaker system where each amplifier zone requires passive tonal adjustment. Its two-channel processing allows paired left and right signals to share the same bass, mid, and treble settings, while the two-stage volume arrangement is designed to improve signal-to-noise performance. The soft-switch function helps reduce shock sound during mode changes. Validate channel polarity, control compatibility, and attenuation range against the manufacturer application circuit before production use.
おすすめ
Analog Radio and Media Player
The BD3403FV-E2 fits analog radio and media-player products that require tone shaping before an output amplifier. Its three-band equalizer gives the user bass, mid, and treble adjustment, and the resistance-ladder circuitry is intended to maintain low noise and low distortion during level control. Use the processor after the source selector and before the final volume or power-amplifier stage. The 6.5 V to 9.5 V supply range requires careful rail planning, while the manufacturer pin and application diagrams should define all required external resistors and capacitors.
おすすめ
Audio Production and Recording Monitor
The BD3403FV-E2 can be used in monitoring and production equipment requiring a passive, two-channel tone and level-control stage. Its built-in 3-band equalizer allows broad tonal adjustment, while the front-volume and rear-volume stages provide a controlled signal path with an emphasis on signal-to-noise ratio. Soft switching can reduce audible transients during function changes. Because this is an analog sound processor rather than a converter, use the manufacturer circuit when setting source levels, ensuring that the control network does not overload the following amplifier input.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: BD3403FV-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 | BD3403FV |
|---|---|---|
| Package | 40-SSOPB | 40-SSOPB |
| Brand | ROHM Semiconductor | ROHM Semiconductor |
| Product Type | 2-channel audio signal processor | Sound processor with built-in 3-band equalizer |
| Operating Supply Voltage | 6.5 V to 9.5 V | 6.5 V to 9.5 V |
| Channel Count | 2 channels | 2 channels |
| Equalizer Bands | 3 bands: bass, mid, and treble | 3 bands: bass, mid, and treble |
| Volume Architecture | 2-stage front-volume and rear-volume configuration | 2-stage front-volume and rear-volume configuration |
| Soft-Switching | Yes | Yes |
| Lifecycle Status | Last Time Buy | Last Time Buy |
主な差別化要因
- Integrated two-channel sound processing （vs BD3403FV)
- Dedicated rear and surround processing （vs BD3403FV)
- Integrated three-band tonal adjustment （vs BD3403FV)
- Low-noise resistance-ladder control （vs BD3403FV)
設計ノート
Route the two analog channels as short, matched paths between the source, the BD3403FV-E2, and the following amplifier. Keep the device away from switching regulators, high-current inductors, and digital timing nodes. Place bypass and application-network components close to their associated pins, and use a continuous ground reference beneath the analog section where the manufacturer's layout guidance permits.
Operate the supply within the specified 6.5 V to 9.5 V range and follow the manufacturer requirements for bypass capacitance and external networks. Keep analog signal amplitudes within the device's operating limits so that the resistance-ladder volume and tone stages do not clip or add excessive distortion. Confirm startup behavior and control settling in the final amplifier configuration.
Do not assume that a functionally similar audio IC is a drop-in substitute merely because both devices process audio. The footprint, pin assignments, control logic, supply pins, external resistors, and capacitor values must all match. In particular, a converter such as the PCM1796DB has a different architecture and is not a substitute for the BD3403FV-E2 without PCB redesign.
Plan for the two-stage front-volume and rear-volume architecture when assigning the PCB signal path. Preserve the intended signal order, keep the rear-volume section downstream of the front section, and isolate control inputs from sensitive audio nodes. Soft switching can reduce switching shock noise, but it does not eliminate the need for careful grounding and short analog routing.
コンプライアンス情報
The manufacturer product page identifies the BD3403FV family as Last Time Buy and states that discontinuation has been announced. No specific RoHS, REACH, halogen-free, or conflict-minerals declaration was included in the cited product information.
