BD3460FS-E2 6-Channel I2C Audio Volume Control | ROHM
部品番号: BD3460FS-E2 ✓ 生産中BD3460FS-E2 概要
An electronic volume control is an integrated audio-processing function that applies programmable attenuation to multiple analog audio channels. Within the broader hierarchy of audio ICs, it sits between audio amplifiers and system microcontrollers, providing a centralized control interface for source selection, fader adjustment, and attenuation. The BD3460FS-E2 also includes ground isolation for external voice inputs used in portable-audio and car-navigation systems.
Key features include six controlled audio channels, I2C register control, an operating supply of 7 V to 9.5 V, and the ROHM Advanced Switch function for reducing volume-switching shock noise. The device is identified as an active automotive-audio and consumer-audio part. Its 24-SSOP-A package uses a 5.40 mm body width and supports surface-mount assembly. The operating range of -40 °C to 85 °C makes it suitable for instrumented vehicles and temperature-demanding consumer equipment.
The internal architecture divides system-level volume management from the final power-amplifier stage. An I2C-compatible host can write attenuation commands to the relevant channel registers, allowing software or a host microcontroller to coordinate multiple audio zones. Ground isolation improves the handling of external voice-source inputs by reducing unwanted ground-related coupling between connected audio sources.
Typical applications include automotive head units, car-navigation systems, multi-zone vehicle audio, portable audio equipment, consumer audio receivers, and other systems requiring coordinated attenuation of several analog channels. The six-channel architecture reduces the need for separate discrete fader networks when one system must control multiple sound paths.
Designers should review the manufacturer pin-description table and recommended application circuit before assigning PCB tracks. Decoupling capacitors should be placed close to the supply and ground pins, while the I2C interface and analog audio paths should be routed with attention to grounding and signal integrity. Adequate input, output, and control-signal levels must also be confirmed against the device limits in the manufacturer datasheet.
This product page organizes the technical specifications, pinout location, application guidance, lifecycle information, and sourcing details for the BD3460FS-E2. It also distinguishes verified device capabilities from options that require board-level or firmware validation before selection.
ドロップイン代替品: BD3460FS-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。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: BD3460FS-E2 （同一形状・フットプリント） — 相違点: Control Interface.
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BD3460FS-E2 最大定格＆電気的特性
| 機能 | Electronic volume control |
| Product Type | General-purpose 6-channel electronic volume controller |
| Number of Channels | 6 channels |
| Control Interface | I2C |
| Supply Voltage Range | 7 V to 9.5 V |
| 動作温度範囲 | -40 °C to +85 °C |
| パッケージ | 24-SSOP-A |
| Package Body Width | 5.40 mm |
| 実装タイプ | Surface mount |
| Product Status | Active |
| Application Area | Automotive audio and consumer audio |
| Volume-Switching Feature | Advanced Switch shock-noise mitigation |
| External Audio Input Feature | Ground isolation amplifier |
| RoHS ステータス | RoHS3 compliant |
| Moisture Sensitivity Level | MSL 1, unlimited floor life |
| Manufacturer | ROHM Semiconductor |
BD3460FS-E2 5.40 mm ピン配置ガイド
BD3460FS-E2 (5.40 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: BD3460FS-E2.
詳細は データシート をご参照ください。
主な用途
BD3460FS-E2 の用途: 6 件s: Automotive Head Unit Audio Control, Multi-Zone Vehicle Cabin Audio, Car Navigation Voice Routing, Consumer Audio Receiver, Portable Audio Equipment, Multi-Channel Sound System.
Automotive Head Unit Audio Control
The BD3460FS-E2 fits an automotive head unit that must attenuate several analog audio paths through a common controller. Its 6-channel architecture supports coordinated adjustment of radio, navigation, media, and auxiliary inputs, while the 7 V to 9.5 V supply range aligns with regulated vehicle audio rails. The -40 °C to +85 °C rating is useful across temperature-variable cabin environments. I2C control permits a host processor to apply volume commands consistently, and Advanced Switch technology helps reduce shock noise while a fader is moving. The final design still needs validation of channel routing, amplifier input impedance, automotive transient protection, and ground-return behavior.
Multi-Zone Vehicle Cabin Audio
The BD3460FS-E2 is suitable for multi-zone cabin audio when separate front, rear, navigation, or auxiliary channels require programmable attenuation. Six channels give the system a compact way to manage multiple fader paths rather than relying on one gain command for every output. The I2C interface allows vehicle-domain software to coordinate changes and mute functions, while Advanced Switch helps preserve smoother audio during volume transitions. Engineers should verify whether every zone requires independent attenuation and confirm the 24-SSOP-A pin arrangement supports the intended signal flow.
Car Navigation Voice Routing
The BD3460FS-E2 can support navigation-audio routing where voice prompts must be attenuated and mixed with other vehicle sources. Its ground-isolation amplifier feature is specifically relevant to external voice inputs connected from portable-audio or navigation equipment, helping manage unwanted ground coupling between source paths. The 6-channel organization allows navigation and entertainment attenuation to be coordinated through I2C. Practical implementation requires checking source levels and grounding so the navigation prompt remains clear without introducing excessive gain or switching artifacts.
Consumer Audio Receiver
The BD3460FS-E2 fits consumer-audio receivers that expose several analog source channels to a common volume controller. It can attenuate source and zone paths from a host processor while operating from a 7 V to 9.5 V regulated rail. The 6-channel count is appropriate when the receiver needs coordinated volume management without a separate electronic attenuator for every path. Advanced Switch is intended to reduce audible shocks during adjustments, making the approach useful for products where volume control is expected to be smooth and unobtrusive.
Portable Audio Equipment
The BD3460FS-E2 can be integrated into portable or semi-portable audio equipment that needs electronic attenuation for external voice or media inputs. Its ground-isolation function addresses ground-coupled noise problems that can arise when analog sources with different references are connected. The I2C interface lets a system controller coordinate volume, mute, or source transitions, and Advanced Switch helps reduce switching shocks. Because the operating supply begins at 7 V, the host design must provide a suitable regulated rail and verify startup, shutdown, and battery-current behavior.
Multi-Channel Sound System
The BD3460FS-E2 is appropriate for a multi-channel sound system requiring centralized electronic fader control across analog inputs or outputs. Six channels allow a controller to manage several zones with programmed attenuation rather than mechanically linked potentiometers. Its I2C interface supports software-managed volume presets, and the 24-SSOP-A package keeps the control function compact for multilayer PCBs. Before implementation, engineers should confirm whether the channel topology supports the intended signal path and verify thermal, grounding, and output-loading behavior in the final analog circuit.
エンジニアリング参考データ: BD3460FS-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
設計ノート
Place the required bypass capacitors directly between the supply and ground pins, using the shortest and lowest-inductance layout possible. Route I2C clock and data traces away from sensitive audio and switching-node paths. Follow the ROHM package drawing and recommended PCB pattern rather than deriving dimensions solely from the 5.40 mm body-width specification.
Use a continuous, low-impedance ground reference for the analog channels and external voice-source inputs. Because the device includes a ground-isolation amplifier for external sources, verify the source and return-path arrangement in hardware rather than assuming a shared ground is always optimal. Keep the I2C pull-up return close to the controller and bus nodes to minimize digital coupling into the audio paths.
Do not treat an I2C-capable volume IC as interchangeable merely because another part also provides gain control. Confirm the 24-SSOP-A footprint, 6-channel configuration, 7 V to 9.5 V supply, attenuation range, register addresses, and control timing. A wrong register map can leave the volume unchanged or mute the wrong path even when electrical and package compatibility appear similar.
Design the 7 V to 9.5 V rail so it stays within the specified limits during startup, load changes, and automotive transients. Confirm regulator headroom, decoupling, and fault behavior for the complete installation. Add the appropriate protection network required by the vehicle platform rather than assuming the IC's operating range provides transient immunity.
コンプライアンス情報
RoHS3 compliance and MSL 1 are identified for BD3460FS-E2. The exact suffix is described as active and intended for automotive audio, but AEC-Q100 qualification is not confirmed.
