AK4137EQ - 2-Channel 32-Bit 768kHz Audio SRC | AKM
MPN： AK4137EQ ✓ 啟用中AK4137EQ 概覽
A digital sample rate converter is an interface IC that resamples or changes the clock rate of digital audio data between incompatible source and destination rates. The AK4137EQ includes an internal oscillator, so it does not require an external master clock for its asynchronous conversion operation. This simplifies system configuration when the source and destination audio domains use unrelated clocks.
Key features include two-channel operation, 32-bit sample processing, asynchronous conversion, input and output rates spanning 8kHz to 768kHz, and PCM-DSD data conversion. The internal oscillator reduces external clock infrastructure, while the broad sample-rate range supports professional audio, USB-DAC, and multirate digital-audio designs. The device is supplied in a 48-LQFP package identified by DigiKey as 48-LQFP (7x7).
The AK4137EQ is intended for applications where audio data arrives from a source clock domain and must be delivered to a DAC, decoder, recorder, or other digital-audio subsystem operating at another rate. Its sample-rate flexibility makes it useful for format bridging, asynchronous playback paths, and PCM-to-DSD or DSD-to-PCM conversion as described by the manufacturer.
Designers should verify the complete pinout, interface logic, clock requirements, supported audio formats, control signaling, and electrical limits against the manufacturer datasheet before layout or firmware implementation. The available verified sources do not provide complete pricing, pin-level assignments, or detailed timing tables, so those values remain data-needed rather than inferred.
直接替換替代品，適用於 AK4137EQ — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此產品無可直接替換的替代品。
申請替代品AK4137EQ 規格
| Product Type | 2-channel digital sample rate converter |
| Channel Count | 2 channels |
| Sample Processing | 32-bit |
| Input Sample Rate | 8kHz to 768kHz |
| Output Sample Rate | 8kHz to 768kHz |
| Conversion Type | Asynchronous sample rate conversion |
| Internal Oscillator | Yes |
| External Master Clock | Not required for asynchronous operation according to verified description |
| PCM-DSD Conversion | Supported |
| 封裝 | 48-LQFP (7x7 mm) |
| 安裝類型 | Surface mount |
| 工作溫度 | -40C to +105C |
| Application Category | Digital audio interfacing |
| 功能 | Sample rate converter |
| 腳位數 | 48 pins |
| RoHS 狀態 | unknown |
| REACH Status | unknown |
| AEC-Q100 Qualification | not_applicable |
AK4137EQ 48-lqfp (7x7 mm) 腳位配置指南
AK4137EQ（48-lqfp (7x7 mm) 封裝）的腳位配置。 腳位編號、功能與連接圖定義於製造商資料手冊中。請參閱該手冊以取得確切的封裝尺寸與焊接指引。
無詳細腳位定義資料： AK4137EQ.
請參閱 資料表 以查看完整腳位配置。
典型應用
AK4137EQ 適用於 6 應用s: USB-DAC Audio Path, High-End Audio System, Asynchronous Audio Playback, PCM-to-DSD and DSD-to-PCM Conversion, Digital Audio Interface Bridging, Professional Audio Monitoring.
USB-DAC Audio Path
The AK4137EQ fits a USB-DAC signal chain because it is explicitly identified by Asahi Kasei Microdevices as suitable for USB-DAC applications. Its two-channel asynchronous sample-rate conversion handles audio domains whose source and destination rates differ, while the 8kHz-to-768kHz range covers high-resolution playback formats. The internal oscillator simplifies systems that would otherwise need additional master-clock infrastructure. Firmware and hardware integration still require validation of USB audio format, interface timing, clocking, and supported PCM-DSD operating modes.
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High-End Audio System
The AK4137EQ is suitable for high-end audio systems that need flexible sample-rate interfacing. Its two-channel architecture supports conversion between incompatible audio rates from 8kHz to 768kHz, allowing source, transport, and DAC stages to operate independently. The internal oscillator reduces the need for a shared master clock in asynchronous arrangements. For premium playback equipment, the key engineering checks are supported data format, clock stability, digital interface configuration, and the converter’s documented mode restrictions.
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Asynchronous Audio Playback
The AK4137EQ is well suited to asynchronous playback because it performs two-channel sample-rate conversion and contains an internal oscillator. This architecture can decouple a digital source clock from the DAC-side rate, avoiding dependence on an external master clock for the asynchronous operating mode described by the manufacturer. The converter supports rates up to 768kHz, making it relevant to high-resolution playback chains. System designers must still confirm the exact asynchronous modes, latency behavior, control registers, and supported data formats in the datasheet.
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PCM-to-DSD and DSD-to-PCM Conversion
The AK4137EQ supports PCM-DSD data conversion according to the verified Asahi Kasei Microdevices product page. This makes it relevant to digital-audio products that need to bridge PCM playback data and DSD workflows rather than merely change the numerical sample rate. Its 2-channel format and 8kHz-to-768kHz operating span provide a broad conversion foundation. Before using it in a DSD product, verify the exact supported DSD rates, data mapping, filter configuration, clock requirements, and output format in the complete manufacturer datasheet.
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Digital Audio Interface Bridging
The AK4137EQ can bridge digital-audio blocks operating at different sample rates, reducing the need to force every subsystem onto one clock domain. Its two-channel asynchronous SRC and broad 8kHz-to-768kHz range are useful when connecting sources, transports, converters, and recording or playback stages. The internal oscillator simplifies clock architecture, but integration still depends on supported interface formats and control signaling. Layout should preserve clean digital return paths and follow the manufacturer’s recommended decoupling and clock guidance.
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Professional Audio Monitoring
The AK4137EQ is applicable to professional audio monitoring systems that receive digital streams at one rate and deliver them to another processing or DAC stage. Its two-channel converter architecture supports stereo conversion, and the 32-bit processing specification is useful for high-resolution audio paths. The internal oscillator can simplify isolated digital domains, while the broad rate range supports multiple standard and high-resolution rates. Designers should verify converter mode restrictions, latency, clock jitter behavior, and the exact supported digital audio formats before production use.
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推薦產品摘要
工程參考資料，適用於 AK4137EQ — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 |
|---|---|
| Package | 48-LQFP (7x7 mm) |
| Brand | Asahi Kasei Microdevices |
| Channel Count | 2 channels |
| Sample Processing | 32-bit |
| Input Sample Rate | 8kHz to 768kHz |
| Output Sample Rate | 8kHz to 768kHz |
| Conversion Mode | Asynchronous sample rate conversion |
| Internal Oscillator | Yes |
| PCM-DSD Conversion | Supported |
| Operating Temperature | -40C to +105C |
主要差異化特點
- Integrated asynchronous conversion and clock support (對比Generic digital sample-rate converter)
- PCM-DSD conversion capability (對比AK4113VF)
- High-resolution two-channel audio positioning (對比Generic audio interface IC)
設計說明
Confirm the AK4137EQ supply voltage, sequencing requirements, and decoupling recommendations from the manufacturer datasheet before laying out the board. The verified excerpts establish the package and signal-processing role but do not provide the complete electrical limits. Place required bypass capacitors close to the relevant supply pins, maintain short return paths, and avoid routing noisy digital or power signals beneath sensitive audio-clock and data nets.
Treat the AK4137EQ as a high-speed digital and clock-sensitive audio interface. Use a continuous ground reference where practical, keep clock traces short and controlled, and route data signals away from switching-power nodes and inductors. The verified data identifies asynchronous operation and an internal oscillator, but it does not provide the complete recommended layout; follow the manufacturer’s pin and reference-circuit guidance for final impedance, topology, and keepout details.
Do not assume that a converter advertising a similar maximum sample rate is a drop-in replacement. A valid replacement must match the 48-LQFP footprint, pin functions, interface voltage, supported data format, clock architecture, and PCM-DSD behavior. The supplied cross-reference search found no verified same-package substitute, so engineering validation is required before replacing AK4137EQ in an existing design.
合規資訊
The provided manufacturer and distributor excerpts do not state RoHS, REACH, halogen-free, lead-free, or conflict-minerals status. Verify these attributes with the manufacturer or authorized distributor documentation.
