BD3482FS-E2 - 2-Band Audio Processor | ROHM Semiconductor
部品番号: BD3482FS-E2 ✓ 生産中BD3482FS-E2 概要
An audio special-purpose IC is a type of signal-processing semiconductor used to modify or condition audio signals rather than merely amplify them. The BD3482FS belongs to the broader sound-processor hierarchy, which sits between general-purpose analog ICs and complete audio codec or amplifier solutions. Its two-band equalizer architecture provides separate control over selected frequency regions, making it useful in compact audio equipment, consumer electronics, and embedded sound systems.
The device's principal documented attributes are its 2-band equalizer function, 8.5 V supply requirement, and 24-pin SSOP package. These characteristics place it in applications where the system already handles the power conversion and output amplification and needs a dedicated stage for frequency-response adjustment. The 24-pin package also provides a defined interface for external passive networks and control signals.
The BD3482FS combines analog audio processing in a dedicated IC rather than requiring discrete filters, amplifiers, and switching networks. That integration can shorten the signal path and reduce the number of separate components needed for basic band control. Exact gain, frequency, attenuation, distortion, and input-impedance limits must be taken from the corresponding tables in the ROHM datasheet when setting the external network and validating signal amplitude.
Typical uses include compact stereo systems, auxiliary audio modules, headphone accessories, portable equipment, and other products in which low-frequency and midrange balance may need adjustment. The part can also serve as the tone-control element in a larger signal chain when the system architecture separates equalization from source selection, volume control, and power amplification.
For implementation, begin with the ROHM application circuit and preserve the recommended supply decoupling and analog grounding arrangement. Component tolerances, resistor ranges, and capacitor selections affect the attainable band centers and response shape, so their values should be calculated from the manufacturer's test conditions rather than copied indiscriminately between designs.
This product guide combines the device identity, package information, application guidance, technical comparison framework, and practical design notes needed for an initial engineering review. Final circuit release should still include schematic review, signal-level verification, stability checks, and confirmation against the current ROHM datasheet and application notes.
ドロップイン代替品: BD3482FS-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BD3482FS-E2 最大定格＆電気的特性
| Product Type | 2-band audio equalizer sound processor |
| Manufacturer | ROHM Semiconductor |
| 電源電圧 | 8.5 V |
| パッケージ | 24-pin SSOP |
| ピン数 | 24 pins |
| Circuit Type | Analog audio signal-processing circuit |
| Equalizer Bands | 2 bands |
| Product Category | Audio Special Purpose IC |
| Technology | Silicon monolithic integrated circuit |
| 実装タイプ | Surface mount |
| RoHS ステータス | RoHS3 compliant |
| Output Channel Type | Audio channel |
| Carrier Type | Tape and reel |
| Input Signal | Analog audio |
BD3482FS-E2 24-pin ssop ピン配置ガイド
BD3482FS-E2 (24-pin ssop 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: BD3482FS-E2.
詳細は データシート をご参照ください。
主な用途
BD3482FS-E2 の用途: 6 件s: Compact Stereo Tone Control, Portable Audio Accessory, Consumer Audio Source Module, Headphone Amplifier Module, Industrial Audio Interface, Two-Band Equalizer Module.
Compact Stereo Tone Control
The BD3482FS-E2 fits a compact stereo tone-control stage when the design needs two adjustable frequency bands rather than a full spectrum equalizer. Its 2-band architecture allows separate influence over low and upper audio regions while keeping the control function in a dedicated 24-pin SSOP IC. The device can sit after source selection and before the output amplifier, with the ROHM reference network determining the band centers. Using an 8.5 V analog supply supports integration with conventional positive-rail audio circuitry. Before schematic release, confirm the intended channel arrangement, gain limits, and input levels in the manufacturer electrical tables.
Portable Audio Accessory
The BD3482FS-E2 is appropriate for a portable audio accessory that adds user-adjustable tone balance to an existing analog signal path. Its two-band equalizer function provides a controlled tonal adjustment without requiring a complex digital processor, while the 24-pin SSOP package limits board area compared with a larger discrete network. The accessory can include source selection before the BD3482FS and a headphone or line-output amplifier after it. Confirm the 8.5 V supply arrangement and validate whether the accessory power system can support the analog headroom required by the documented operating condition.
Consumer Audio Source Module
The BD3482FS-E2 can serve as the tone-shaping element in a consumer audio source module assembled from separate source, processing, and output stages. A dedicated 2-band sound processor is easier to implement predictably than a multi-band network when only two frequency regions require adjustment. The part's 24-pin SSOP footprint supports compact module layouts, while its separate processing function keeps the signal chain organized. Engineers should use the ROHM application circuit to establish the component network, grounding arrangement, and signal amplitude, then verify the final response with the target source impedance and load.
Headphone Amplifier Module
The BD3482FS-E2 can precede a headphone amplifier in a module that requires simple bass-and-treble style adjustment. The IC provides dedicated 2-band equalization while leaving low-level signal generation, source selection, and headphone drive to purpose-designed stages. This division of responsibility can make the overall design easier to tune because frequency compensation is established before the output amplifier. The 8.5 V supply and 24-pin SSOP package must be accommodated in the analog rail and PCB planning. Validate maximum input amplitude, output loading, and channel balance using the manufacturer's application information and the intended headphone impedance.
Industrial Audio Interface
The BD3482FS-E2 is suitable for a compact industrial audio interface when two adjustable frequency bands are sufficient for conditioning an analog source. Industrial equipment may use the processor to compensate for predictable acoustic or signal-chain coloration, but the adjustment range must remain within the device's documented behavior. The dedicated sound-processor function can reduce discrete component count compared with a manually designed active filter. Keep sensitive analog traces away from switching and high-current power nodes, follow the recommended SSOP footprint, and confirm the 8.5 V operating condition against the interface power architecture.
Two-Band Equalizer Module
The BD3482FS-E2 directly matches a small two-band equalizer module built around analog audio controls. Its identified 2-band sound-processing role supports independent adjustment of two frequency regions, while the 24-pin SSOP package allows the module to remain compact. The implementation should use the manufacturer-recommended resistor and capacitor values to establish frequency centers and response shape because component tolerance directly influences tonal calibration. Supply the device from a stable 8.5 V rail, decouple it near the package, and test both channels with the intended source and output load. This arrangement separates equalization from final amplification, simplifying board-level troubleshooting.
エンジニアリング参考データ: BD3482FS-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 |
|---|---|
| Product Type | 2-band audio equalizer sound processor |
| Brand | ROHM Semiconductor |
| Package | 24-pin SSOP |
| Supply Voltage | 8.5 V |
| Equalizer Bands | 2 bands |
| Circuit Type | Analog audio signal processor |
| Implementation | Silicon monolithic integrated circuit |
| Mounting Type | Surface mount |
| RoHS Status | RoHS3 compliant |
主な差別化要因
- Purpose-built two-band sound processing （vs General-purpose audio amplifier IC)
- Compact dedicated analog integration （vs Discrete two-band equalizer implementation)
- Documented 8.5 V operating point （vs Low-voltage audio IC operating from another rail)
設計ノート
Follow the ROHM 24-pin SSOP footprint and place input, output, and frequency-setting networks close to their associated pins. Keep the analog supply bypass capacitor at the supply entry point, maintain a continuous ground reference beneath the audio path, and route high-current output-amplifier returns away from the sound-processor ground region. SSOP lead spacing demands accurate land-pattern alignment, so verify the package drawing before Gerber release.
Design the analog supply around the documented 8.5 V operating condition and include local high-frequency bypass plus adequate bulk capacitance near the device. Confirm the bypass capacitor's DC bias behavior and voltage rating in the frequency range used by the equalizer network. If the preceding regulator is shared with switching circuitry, measure ripple at the IC under minimum-load, maximum-load, and startup conditions rather than assuming the nominal rail is sufficiently quiet.
Use the manufacturer's recommended external resistor and capacitor values to set the two band centers and response shape, and calculate tolerance before calibrating the user controls. Check source impedance because a non-ideal source can alter the effective network. Confirm that signal levels remain within the documented linear range and that the unused audio or control pins are connected exactly as shown in the ROHM connection diagram.
Do not treat the BD3482FS-E2 as a general-purpose power amplifier or substitute it for a signal-chain stage based only on package similarity. A valid drop-in decision requires the same 24-pin SSOP footprint, matching pin assignments, compatible 8.5 V operation, and equivalent two-band behavior. Also avoid carrying resistor values from a generic equalizer circuit without checking their effect on band centers, gain, and input impedance under the ROHM test conditions.
コンプライアンス情報
The component listing identifies the BD3482FS-E2 as RoHS3 compliant. No additional environmental or automotive qualification is claimed.
