WM8738CGED - 24-Bit 96kHz Stereo ADC | Cirrus Logic
MPN: WM8738CGED ✓ نشطWM8738CGED نظرة عامة
An ADC, or analog-to-digital converter, is an integrated circuit that samples an analog audio voltage and converts it into a digital representation. A stereo ADC processes two audio channels, which allows left and right microphone, line, or other analog sources to be captured simultaneously. Digital audio words are then transferred to a processor, digital signal processor, or audio codec using a serial interface such as I2S. The WM8738CGED therefore occupies the boundary between the analog input stage and the digital audio processing stage.
According to the verified DigiKey and Mouser product listings, the key device parameters are 24-bit conversion, operation up to 96 kHz, stereo ADC operation, I2S support, and a 14-SOIC package. The 24-bit resolution provides a nominal 16,777,216 quantization levels per channel, while 96 kHz supports the conversion rate required by many CD-rate and higher-rate audio systems. These figures make the part applicable to consumer audio, communications, multimedia, and embedded audio-conversion equipment.
The 14-SOIC package is mechanically compact relative to many older through-hole audio converters and is suitable for conventional surface-mount PCB assembly. Its small pin count should be evaluated carefully in designs requiring multiple analog inputs, auxiliary digital functions, or extensive filtering. The verified distributor data does not expose the complete input topology, clocking architecture, analog reference arrangement, or auxiliary interface implementation, so those details should be confirmed in the manufacturer datasheet before layout is released.
For implementation, the analog input path, grounding, and clocking integrity are the decisive engineering areas. Short, symmetrical analog traces, adequate bypass capacitors, and a clean source of digital audio clock signals help preserve converter performance. Designers should also verify supported master and slave clock configurations, input coupling requirements, and the required logical control sequence against the official datasheet.
This page consolidates verified distributor specifications, source links, and drop-in replacement information for the Cirrus Logic WM8738CGED. It also separates confirmed parameters from values that still require the manufacturer datasheet, preventing unverified electrical, pinout, and compliance claims from being presented as established facts.
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الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع WM8738CGED (نفس عامل الشكل والبصمة) — يختلف في Manufacturer, Package.
WM8738CGED/R
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عرض ورقة البيانات ←WM8738CGED الحدود القصوى والخصائص الكهربائية
| Manufacturer | Cirrus Logic |
| الوظيفة | Stereo audio analog-to-digital converter |
| الدقة | 24 bit |
| Maximum Sampling Rate | 96 kHz |
| Digital Audio Interface | I2S |
| Channel Configuration | Stereo |
| العلبة | 14-SOIC |
| نوع التركيب | Surface Mount |
| Device Classification | Audio A/D Converter IC |
دليل تكوين أطراف WM8738CGED 14-soic
تكوين الأطراف لـ WM8738CGED (حزمة 14-soic). يتميز هذا المكوّن التناظري بأطراف الإدخال والإخراج وإمداد الطاقة. راجع ورقة بيانات الشركة المصنعة لتكوينات طرف إلغاء الإزاحة والتعويض والتمكين. مثالي لدوائر تكييف الإشارة والمضخمات.
لا تتوفر بيانات مفصلة لمخطط التوصيلات لـ WM8738CGED.
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التطبيقات النموذجية
WM8738CGED مناسب لـ 6 التطبيقs: Stereo Microphone Audio Capture, USB and Embedded Audio Capture, Digital Audio Recording Front End, Communications and VoIP Audio Front End, Consumer Audio and Multimedia Conversion, Stereo Test and Measurement Front End.
Stereo Microphone Audio Capture
The WM8738CGED fits stereo microphone capture because it combines 24-bit conversion, simultaneous stereo operation, and digital audio transfer through I2S in a 14-SOIC package. Two analog channels can be digitized and handed to a digital signal processor, codec, or host controller without a separate converter for each side. The 96 kHz maximum rate also provides headroom above 48 kHz class audio. Before schematic capture, verify the supported microphone input topology, gain range, biasing requirements, and analog reference arrangement in the manufacturer datasheet. PCB layout should keep the two channels geometrically similar so that timing and analog-path differences do not introduce channel imbalance.
موصى به
USB and Embedded Audio Capture
The WM8738CGED can serve as the analog front end in a USB or embedded audio-capture design where a controller requires an I2S slave interface. Its 24-bit stereo conversion and 96 kHz capability suit multimedia capture while the 14-SOIC package keeps the analog section compact. The converter sits between the analog input network and the digital audio processor; synchronization depends on a clean master clock and correctly configured I2S framing. Verify supported clock ratios and slave-mode behavior before finalizing the host interface. Use controlled-impedance digital routing for I2S and clock signals, and keep microphone or line amplifiers physically separate from the converter return path.
موصى به
Digital Audio Recording Front End
The WM8738CGED is applicable to the conversion stage of a multi-channel recording system that requires accurate 24-bit stereo sampling at up to 96 kHz. Its I2S output can feed a digital audio processor that performs mixing, encoding, or storage formatting. Because the verified listing identifies the device as a low-power stereo ADC, it is particularly relevant to compact portable equipment. The 96 kHz capability allows designs to oversample or support higher-rate source material, provided the rest of the clock and storage chain supports that rate. Confirm converter latency, digital filters, and supported data-word formats in the datasheet before synchronizing multiple channels or aligning recorded samples.
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Communications and VoIP Audio Front End
The WM8738CGED can be used in communications equipment as the stereo ADC ahead of a voice-processing or conferencing pipeline. The 24-bit conversion depth preserves a wide digital representation of the analog input, while I2S provides a conventional link to digital signal processors and communication controllers. At 96 kHz maximum sampling, the device can support oversampling relative to narrowband voice rates, although the system clock tree must be designed around a supported operating mode. Keep the microphone preamplifier close to the ADC and route I2S away from sensitive analog inputs. Verify whether the selected source impedance and bias arrangement meet the converter's analog input requirements.
موصى به
Consumer Audio and Multimedia Conversion
The WM8738CGED fits consumer audio and multimedia subsystems that need a compact stereo conversion function between analog media sources and a digital processor. Its 24-bit resolution, 96 kHz maximum rate, and I2S output cover a broadly useful range of playback-adjacent and capture-related conversion tasks. The 14-SOIC package supports standard surface-mount assembly and is smaller than many legacy converter packages. Designers should treat the ADC as one element of a complete analog chain: input conditioning, reference quality, grounding, and clock cleanliness can determine practical performance. Confirm supported input paths and digital filter behavior in the datasheet before sharing a converter between multiple source selections.
موصى به
Stereo Test and Measurement Front End
The WM8738CGED may be evaluated for stereo test and measurement front ends that convert two analog signals into 24-bit digital data for analysis, display, or automated capture. Its 96 kHz sampling capability gives the instrument designer a defined upper conversion rate, while I2S simplifies connection to programmable digital logic. Because the supplied data does not specify full-scale range, SNR, THD+N, latency, or clock accuracy, those characteristics must be measured or obtained from the datasheet before setting measurement expectations. Use separate analog paths where possible, provide symmetric routing, and calibrate gain after installation. A clean reference and controlled clock distribution are especially important in instrumentation applications.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ WM8738CGED — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | WM8738CGED/R |
|---|---|---|
| Package | 14-SOIC | 14-SOIC |
| Brand | Cirrus Logic | Cirrus Logic |
| Function | Stereo audio ADC | Stereo audio ADC |
| Resolution | 24 bit | 24 bit |
| Maximum Sampling Rate | 96 kHz | 96 kHz |
| Digital Audio Interface | I2S | I2S |
| Channel Configuration | Stereo | Stereo |
| Replacement Requirement | Reference device | No PCB modification required per verified cross-reference |
أبرز الفروقات
- Compact 24-bit stereo conversion in 14 pins (مقابلWM8738CGED/R)
- High-rate stereo capture in a surface-mount footprint (مقابلWM8738CGED/R)
- Documented mechanical and functional interchangeability (مقابلWM8738CGED/R)
ملاحظات التصميم
Route the two analog input channels as similarly as practical, including comparable trace lengths, component placement, and return paths. Differences in source impedance, grounding, or trace geometry can create channel-to-channel gain and timing offsets that are not corrected by the converter's 24-bit nominal resolution. Keep the analog section physically separated from I2S and clock routing, and place input-network components close to the package rather than at the connector.
Treat the master clock and I2S lines as timing-critical digital interfaces. Use short traces, continuous reference planes, and a clock source with low jitter; verify both edges and setup-and-hold requirements against the manufacturer timing data before choosing pull resistors or termination. Because the supplied snippets confirm I2S support but do not specify master-versus-slave modes or supported clock ratios, those requirements must be resolved from the official datasheet before routing is finalized.
Separate analog and digital supply routing where the device architecture provides independent rails, and place the required bypass capacitors directly beside their respective pins. Keep supply-return currents out of the analog signal-return path to avoid converting supply ripple into conversion error. The verified web data does not include supply voltages, current consumption, or capacitor recommendations, so use the manufacturer values rather than generic assumptions.
Do not treat a 24-bit label as an automatic guarantee of 24-bit system accuracy. Source noise, analog gain, reference quality, clock jitter, PCB leakage, and digital post-processing all affect the usable result. Similarly, the verified 96 kHz figure is a maximum capability, not a guarantee that every clock ratio is supported. Build a clock tree that matches a documented operating mode and evaluate the complete analog-to-digital path before production release.
معلومات الامتثال
The supplied web results confirm distributor availability and basic device parameters but do not state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. These fields remain unknown rather than being inferred from general distributor listings.