BD3869AF-E2 2-Channel I2C Audio Processor | ROHM
MPN: BD3869AF-E2 ✓ نشطBD3869AF-E2 نظرة عامة
An audio signal processor is an application-specific integrated circuit that adjusts or manages audio signals within a larger signal chain. Unlike a general-purpose codec, which primarily performs conversion between analog and digital representations, this device is designed around predefined audio-control functions. In the BD3869AF family, one prominent function is loudness adjustment linked to volume attenuation, allowing a television or similar system to coordinate perceived loudness with the selected volume level. The processor also provides I2C bus control for integration with a system controller.
The BD3869AF-E2 supports a control-voltage range of 3.3 V to 5.5 V and allows a maximum of three channels to be used simultaneously. Its two-channel architecture makes it suitable for stereo television audio paths, while the multi-channel capability provides flexibility for systems that also need an additional processed channel. The -E2 variant is identified with surface-mount, tape-and-reel handling for automated production assembly.
The Bi-CMOS implementation combines bipolar circuitry with CMOS circuitry in one monolithic integrated circuit. In the BD3869AF/BD3869AF-E2 family, this process supports the analog signal-processing functions required by the television audio processor while also enabling the digital control functions associated with its I2C interface. The manufacturer describes the BD3869AF and BD3869AF-E2 as an audio sound processor for TV systems, positioning the device within the broader hierarchy of consumer-audio ICs, audio signal processors, and application-specific semiconductors.
Typical applications include television speaker-path control, stereo television audio processing, volume-attenuation coordination, and sound systems that require programmable audio behavior through an I2C bus. The processor can be paired with a television audio amplifier when a system requires an external power stage after low-level signal processing. It may also be used in other consumer-audio products that can reproduce the required signal functions and implement the corresponding control protocol.
When designing around the BD3869AF-E2, confirm the complete pin assignment, analog signal levels, control registers, and external-component recommendations in the Rohm datasheet before finalizing the PCB. Pay particular attention to the 18-SOP footprint, the 3.3 V to 5.5 V control-voltage range, and the interface requirements of the host controller. Decoupling, grounding, and analog-versus-digital partitioning should follow the manufacturer’s reference layout to reduce noise coupling into the processed audio paths.
This product record combines the verified device identity, package format, control interface, channel capability, process technology, and sourcing context with practical design guidance. It also distinguishes the exact BD3869AF-E2 orderable device from unsupported claims about other package variants and provides a clear basis for checking datasheets, pin assignments, lifecycle status, and replacement requirements.
بدائل مباشرة لـ BD3869AF-E2 — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
لا تتوفر بدائل متوافقة تمامًا لهذا المنتج.
اطلب بدائلBD3869AF-E2 الحدود القصوى والخصائص الكهربائية
| Device Type | Audio signal processor |
| Audio Channel Count | 2 channels |
| Maximum Simultaneously Used Channels | 3 channels |
| Control Interface | I2C bus |
| Control Voltage Range | 3.3 V to 5.5 V |
| Operating Voltage Range | 5.3 V to 9.5 V |
| Process Technology | Bi-CMOS |
| Integrated Circuit Construction | Silicone monolithic integrated circuit |
| Loudness Function | Built-in loudness linked to volume attenuation amount |
| العلبة | 18-SOP |
| نوع التركيب | Surface mount |
| Order Code Handling | Tape-and-reel -E2 code |
| Target Application | TV audio sound processing |
دليل تكوين أطراف BD3869AF-E2 18-sop
تكوين الأطراف لـ BD3869AF-E2 (حزمة 18-sop). تتضمن هذه الدائرة المتكاملة الرقمية GPIO وواجهات الاتصال (UART وSPI وI2C) وأطراف الطاقة. راجع ورقة بيانات الشركة المصنعة لوظائف الأطراف البديلة وخيارات التكوين. ضرورية لتصميم الأنظمة المدمجة وتخطيط PCB.
لا تتوفر بيانات مفصلة لمخطط التوصيلات لـ BD3869AF-E2.
راجع ورقة البيانات للحصول على تكوين الأطراف الكامل.
التطبيقات النموذجية
BD3869AF-E2 مناسب لـ 6 التطبيقs: Television Stereo Audio Processing, Programmable Volume-Attenuation Control, Multi-Channel Television Sound Path, Consumer-Audio System Control, Audio Preprocessing Before External Amplification, Surface-Mount Television Main Board.
Television Stereo Audio Processing
The BD3869AF-E2 fits television stereo audio paths that require dedicated signal processing rather than a general-purpose codec. Its two-channel architecture corresponds to left and right stereo channels, while the built-in loudness function linked to volume attenuation helps coordinate perceived loudness as the user changes the volume setting. The Rohm datasheet identifies the device specifically as an audio sound processor for TV systems. Its 3.3 V to 5.5 V I2C control range also allows connection to common 3.3 V or 5 V television control buses. Place the processor in the low-level audio-control path and preserve a separate amplifier stage where the design requires additional output power.
Programmable Volume-Attenuation Control
The BD3869AF-E2 is appropriate when a television must apply programmed attenuation while maintaining the intended relationship between perceived loudness and volume. The Rohm datasheet identifies built-in loudness linked to the volume-attenuation amount as a defining feature, allowing system software to coordinate the behavior through I2C rather than relying solely on an external analog control network. This can simplify control logic in consumer-audio products that need repeatable presets, mute coordination, or level-dependent loudness compensation. The implementation should follow the manufacturer’s register and application guidance, and the host controller must meet the supported 3.3 V to 5.5 V control-voltage range.
Multi-Channel Television Sound Path
The BD3869AF-E2 can be considered for television systems that need more than a simple stereo volume block because the Rohm documentation states that a maximum of three channels can be used simultaneously. This makes the processor relevant to designs combining conventional stereo audio with an additional processed channel, such as a related auxiliary or surround-related signal path. The device’s two-channel audio-processor identity should still be reconciled with the three-channel family capability during schematic design. Confirm the exact routing, mode settings, pin allocation, and shared signal constraints in the manufacturer datasheet, and implement I2C control from a host capable of operating within the 3.3 V to 5.5 V control-voltage range.
Consumer-Audio System Control
The BD3869AF-E2 can serve as the programmable audio-control element in a consumer-audio product that requires coordinated level behavior. Its I2C interface allows a system controller to invoke internal processing functions, and the loudness-attenuation relationship supports products in which perceived loudness should remain consistent across volume positions. The device is especially relevant where a dedicated 18-SOP audio processor is preferred over implementing the same behavior in a host microcontroller or adding discrete analog networks. Designers should evaluate whether the functional gain justifies the additional IC, and should follow the Rohm reference circuit for supply decoupling, grounding, signal routing, and control-bus connections.
Audio Preprocessing Before External Amplification
The BD3869AF-E2 is suitable for an audio preprocessing stage placed ahead of a power amplifier in television or integrated-audio equipment. Its role is to apply programmed audio behavior and coordinate attenuation before the downstream amplification stage, allowing that amplifier to concentrate on voltage gain and speaker drive. The 5.3 V to 9.5 V operating range and separate 3.3 V to 5.5 V control range should be planned during rail budgeting. Because the device is an 18-SOP surface-mount part, designers must preserve adequate copper area and maintain separation between sensitive audio traces and digital control paths according to the manufacturer layout guidance.
Surface-Mount Television Main Board
The -E2 ordering code identifies a tape-and-reel presentation of the 18-SOP device, making BD3869AF-E2 appropriate for automated assembly in television main boards and compact consumer-audio products. Surface-mount construction reduces board area compared with a through-hole implementation and supports high-volume pick-and-place manufacturing. The design still requires careful handling of the 18 leads, analog input or output routing, ground connections, and the I2C control bus. Review the package drawing and recommended land pattern in the Rohm datasheet, verify pin 1 orientation during PCB review, and apply the specified reflow profile to achieve reliable production assembly.
بيانات مرجعية هندسية لـ BD3869AF-E2 — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج |
|---|---|
| Package | 18-SOP |
| Brand | ROHM Semiconductor |
| Product Type | Audio signal processor |
| Audio Channels | 2 channels |
| Maximum Simultaneously Used Channels | 3 channels |
| Control Interface | I2C bus |
| Control Voltage Range | 3.3 V to 5.5 V |
| Operating Voltage Range | 5.3 V to 9.5 V |
| Process Technology | Bi-CMOS |
| Loudness Function | Built-in loudness linked to volume attenuation amount |
ملاحظات التصميم
Assign the PCB footprint from the Rohm package drawing rather than from a generic 18-SOP library symbol. Confirm lead pitch, body width, span, and pin-1 orientation before releasing Gerber files. The -E2 suffix denotes tape-and-reel ordering, so the component placement and feeder orientation should also match the manufacturer’s handling instructions. A separate pin and footprint review is particularly important because pin functions and supply connections determine whether the analog and digital sections remain properly separated.
Route the I2C control signals away from the processed audio paths and use the grounding and decoupling arrangement shown in the manufacturer application guidance. Place bypass capacitors at the intended power pins with short, direct return paths, and avoid routing high-current amplifier outputs beneath the processor. When the television main board combines audio processing with switching supplies, keep switching nodes and inductors away from the sensitive audio section to reduce magnetic and capacitive coupling into the processor.
Do not treat BD3869AF, BD3869AF-E2, and BD3869AS as automatically interchangeable order codes. Confirm the exact ordering code, package, pinout, temperature requirements, and production configuration in the Rohm documentation. Also distinguish the 3.3 V to 5.5 V control-voltage range from the 5.3 V to 9.5 V operating-voltage range; designing the interface and supply rails from the wrong limit can prevent operation or damage downstream circuitry.
معلومات الامتثال
The available product information identifies the device as a non-automotive consumer-audio IC but does not state RoHS, REACH, lead-free, halogen-free, or conflict-minerals status.
