BD34704KS2 - 8-Channel 7.1ch Audio Processor | ROHM Semiconductor
MPN: BD34704KS2 ✓ فعالBD34704KS2 نمای کلی
An audio sound processor is a specialized interface IC that controls signal level, channel distribution, and zone routing between audio sources and amplifier stages. In a home-theater hierarchy, the BD34704KS2 sits between source-selection circuitry and powered speakers or amplifiers. It is designed to support surround-sound channel management while reducing audible transitions during attenuation.
The principal features include independent volume control for eight channels, support for 7.1-channel systems, and micro-step volume operation. According to the manufacturer, improved operational-amplifier specifications and optimized element layout support high-quality audio reproduction. Micro-step attenuation is especially useful when reducing channel level, because the finer adjustment steps can reduce switching pop noise compared with abrupt volume transitions.
The device also supports multi-zone input selection, allowing one sound processor to serve multiple listening areas or route different source channels to different output groups. This integration can simplify the analog control section of an AV receiver, home-theater controller, or multi-zone audio amplifier while reducing the number of discrete attenuators and routing components required.
Typical uses include 7.1-channel home-theater systems, AV receivers, surround-sound amplifiers, multi-zone audio equipment, and other analog audio products requiring eight independently controlled channels. The 6.5V to 7.5V operating range places it in a conventional analog power rail, allowing system-level design around a nominal 7V supply.
Layout quality is critical because the manufacturer's product information specifically identifies optimized element layout as part of the device's sound-quality strategy. Place input and output paths away from switching supplies and high-current return paths, maintain symmetrical grounding where practical, and decouple the analog supply close to the device.
This product page combines the known 8-channel architecture, 7.1-channel use case, micro-step volume behavior, supply range, and package information with practical guidance for AV receiver, amplifier, and multi-zone audio designs.
جایگزین‌های drop-in برای BD34704KS2 — همان پکیج، سازگار پین‌به‌پین. قطعات با پکیج متفاوت که نیاز به تغییر PCB دارند مستثنی هستند.
هیچ جایگزین مستقیمی برای این محصول موجود نیست.
درخواست جایگزینBD34704KS2 حداکثر مقادیر مجاز و مشخصات الکتریکی
| Product Type | 8-channel analog audio sound processor |
| Channel Count | 8 channels |
| Surround Configuration | 7.1 channels |
| Supply Voltage Range | 6.5V to 7.5V |
| Volume Architecture | 8 independent volume channels |
| Volume Control Method | Micro-step volume attenuation |
| Zone Support | Multi-zone input selection |
| بسته‌بندی | 80-pin SQFP-T80C |
| Alternate Package Designation | 80-pin LQFP |
| نوع نصب | Surface mount |
| تعداد پایه | 80 pins |
| RoHS Compliance | RoHS3 compliant |
| REACH Compliance | unknown |
| MSL Classification | unknown |
راهنمای پیکربندی پین BD34704KS2 80-pin lqfp
پیکربندی پین برای BD34704KS2 (پکیج 80-pin lqfp). این IC دیجیتال شامل GPIO، رابط‌های ارتباطی (UART، SPI، I2C) و پین‌های تغذیه است. برای عملکردهای جایگزین پین و گزینه‌های پیکربندی به دیتاشیت سازنده مراجعه کنید. ضروری برای طراحی سیستم‌های نهفته و چیدمان PCB.
داده پین‌آوت تفصیلی موجود نیست برای BD34704KS2.
به دیتاشیت برای پیکربندی کامل پین‌ها.
کاربردهای معمول
BD34704KS2 مناسب است برای 6 کاربردs: 7.1-Channel Home-Theater Receiver, Multi-Zone Audio Amplifier, Surround-Sound Power Amplifier, AV Source and Zone Selector, Analog Audio Distribution Head, Premium Audio System Controller.
7.1-Channel Home-Theater Receiver
The BD34704KS2 fits a 7.1-channel home-theater receiver because it provides eight independent analog volume channels in a single 80-pin SQFP-T80C device. Its micro-step attenuation can make channel-level changes less abrupt, supporting smoother operation when users move between surround modes or adjust relative speaker levels. The 6.5V to 7.5V operating range supports a conventional analog supply architecture. In the receiver signal path, the IC can sit after source selection and before the main output amplifiers, reducing the need for separate analog attenuator networks while preserving distinct control for front, center, surround, and rear channels.
پیشنهادی
Multi-Zone Audio Amplifier
The BD34704KS2 is suitable for a multi-zone listening system that must distribute and attenuate eight analog channels without using separate potentiometer stages for every output. Multi-zone input selection lets the sound processor organize channel routing for different rooms, while independent volume control supports local level adjustment. Its 7.1-channel architecture also provides a practical fit for a main theater zone plus a secondary listening area. The 6.5V to 7.5V supply range should be regulated close to the IC, with analog ground and power routing designed to prevent output-stage activity from coupling into the low-level processing paths.
پیشنهادی
Surround-Sound Power Amplifier
BD34704KS2 can serve as the volume-control and channel-management element ahead of a discrete surround-sound power amplifier. Eight independent channels provide direct control over the relative levels presented to amplifier inputs, and the 7.1-channel capability aligns naturally with seven main surround positions plus an additional channel. Micro-step attenuation can reduce audible clicks or pops when a receiver changes operating mode or the user adjusts channel balance. Because the processor is optimized for high-quality analog sound, board layout should preserve short signal paths, use continuous ground planes, and keep switching-regulator and output-driver return currents away from the sensitive input and control sections.
پیشنهادی
AV Source and Zone Selector
The BD34704KS2 supports an AV source-and-zone selector designed around independent analog channel levels. Multi-zone input selection can organize multiple source groups and output areas, while the eight-channel volume system provides distinct attenuation for each signal path. This is useful in equipment where several source selections share the same speaker outputs but require different channel balances. The processor should be placed after input switching and before output amplification, with control lines isolated appropriately from sensitive audio paths. Its 80-pin surface-mount package supports compact designs, although the dense footprint requires careful fan-out and a continuous, low-impedance ground reference.
پیشنهادی
Analog Audio Distribution Head
An analog audio distribution head can use the BD34704KS2 when several downstream destinations require independently adjustable levels from eight source channels. The device provides the attenuation and routing core, allowing source-selection circuitry to remain separate from channel-volume control. This arrangement is useful in professional monitoring, custom installation, and high-end audio distribution equipment where channel balance must change predictably. Micro-step adjustment improves control resolution and can reduce audible transitions during attenuation. The implementation should maintain consistent impedance paths across channels and use regulated supply decoupling close to the IC, since channel-to-channel level differences are easily revealed by impedance mismatch or unstable reference behavior.
پیشنهادی
Premium Audio System Controller
The BD34704KS2 is appropriate for a premium analog audio controller that prioritizes channel-level quality and independent volume management over digital audio routing. Its eight-channel architecture covers a 7.1-channel system, and ROHM highlights improved operational-amplifier specifications, optimized element layout, and micro-step volume as the main quality features. The IC can therefore serve as the central signal-conditioning and attenuation stage in a high-end integrated amplifier or surround processor. Designers should use short, balanced trace geometry where practical, maintain separation between control and audio returns, and verify stability against the manufacturer application circuit rather than substituting generic capacitor values.
پیشنهادی
خلاصه محصولات پیشنهادی
داده‌های مرجع مهندسی برای BD34704KS2 — مقایسه، راهنمای طراحی و اطلاعات انطباق.
راهنمای انتخاب
مقایسه با جایگزین‌ها
| پارامتر | این محصول |
|---|---|
| Brand | ROHM Semiconductor |
| Package | 80-pin SQFP-T80C |
| Product Type | 8-channel analog audio sound processor |
| Channel Count | 8 channels |
| Surround Configuration | 7.1 channels |
| Supply Voltage Range | 6.5V to 7.5V |
| Volume Control | Independent micro-step volume for 8 channels |
| Zone Support | Multi-zone input selection |
| RoHS Status | RoHS3 compliant |
تفاوت‌های کلیدی
- Eight-channel volume processing in one dedicated IC (در مقابلNo verified drop-in alternative for BD34704KS2)
- Micro-step attenuation for smoother level adjustment (در مقابلNo verified drop-in alternative for BD34704KS2)
- Purpose-built 7.1-channel and multi-zone architecture (در مقابلNo verified drop-in alternative for BD34704KS2)
یادداشت‌های طراحی
Use the manufacturer's 80-pin SQFP-T80C land pattern and pin-description table when assigning nets and assigning fan-out. The package has 80 physical positions, but individual functional pin names are not established in the available manufacturer listing. Confirm every analog input, output, control, supply, and ground connection against the official datasheet before releasing artwork; dense QFP-style packages amplify routing and soldering errors.
Keep the analog sound-processing paths away from switching supplies, digital clock lines, relay drivers, and high-current amplifier return paths. Use a continuous ground reference where practical, avoid splitting analog and power returns beneath the IC, and route control signals so they do not pass parallel to sensitive audio inputs. The manufacturer identifies optimized element layout as part of the device's sound-quality strategy, making placement and return-current control important rather than optional.
Design the supply around the stated 6.5V to 7.5V operating range and place local decoupling at the power pins. The BD34704KS2 is an analog sound processor rather than a digital logic device, so supply noise and ground disturbances can appear directly in the processed audio path. Follow the manufacturer application circuit for capacitor type, voltage rating, and placement. Use a regulated analog rail and verify startup and channel-transition behavior across minimum and maximum supply conditions.
Do not treat an ordinary multichannel audio codec as an automatic substitute for the BD34704KS2. The target device combines eight independent analog volume channels, 7.1-channel arrangement, multi-zone input selection, and micro-step attenuation in an 80-pin package. A replacement must match the land pattern, pin functions, supply range, attenuation architecture, and control protocol. Also avoid inferring pinout or capacitor values from distributor summaries; use the manufacturer datasheet for those details.
اطلاعات انطباق
ROHS3 compliance is identified for BD34704KS2. REACH, MSL, lead-free, halogen-free, and conflict-minerals status are not confirmed.
