AK5397EQ - 32-Bit Stereo Audio ADC | Asahi Kasei
MPN： AK5397EQ ✗ 停產AK5397EQ 概覽
An audio ADC is a data-converter IC that transforms left and right analog audio signals into digital data for processing, storage, transmission, or playback. The stereo delta-sigma architecture belongs to the broader ADC and data-acquisition IC category. It is optimized for audio-band conversion, where high dynamic range, low distortion, clocking accuracy, and an integrated digital interface are more important than the high conversion rates used by general-purpose instrumentation ADCs.
The AK5397EQ combines 32-bit resolution, stereo conversion, and operation up to 768 kHz in a single device. Its 127 dB dynamic range provides ample headroom for high-fidelity capture, while the I2S interface supports direct connection to audio processors and digital signal processors. According to the manufacturer datasheet, the AK5397 belongs to AKM's VERITA series within the Audio 4 Pro family and uses VELVET SOUND technology. The listed operating-temperature range is -10°C to 70°C.
The AK5397EQ operates from a 5 V nominal analog supply and a 3 V to 3.6 V digital supply. Separate analog and digital supply domains help control coupling between sensitive conversion circuitry and digital switching activity. The part uses an I2S output, supports a dual-channel conversion topology, and is specified for audio frequencies up to 192 kHz, with a listed 768 kHz sampling-rate capability. Exact clock architecture, digital levels, and channel timing must be implemented according to the manufacturer pin description and timing diagrams.
Typical applications include professional digital recording consoles, high-resolution stereo capture, premium home-theater equipment, studio monitors, digital mixers, and broadcast audio subsystems. Its combination of 32-bit resolution, 127 dB dynamic range, and 768 kHz capability is particularly useful when the design must preserve substantial headroom for mastering, post-processing, or future conversion stages.
Design the AK5397EQ with short, quiet analog input paths, a low-noise reference arrangement, and careful separation between analog and digital return currents. Place decoupling capacitors close to the supply pins and preserve the recommended clock and I2S layout. Because the converter is offered in an obsolete lifecycle state, verify current sourcing status and obtain a written quotation before committing it to a new production design.
This page consolidates the device's electrical identity, package information, application guidance, design cautions, and verified sourcing context. It also distinguishes documented capabilities from parameters that engineers must confirm in the manufacturer datasheet, helping purchasing, hardware, and signal-integrity teams evaluate the AK5397EQ consistently.
直接替換替代品，適用於 AK5397EQ — 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AK5397EQ 最大額定值與電氣特性
| Converter Type | 32-bit stereo delta-sigma audio ADC |
| 解析度 | 32 bit |
| Number of Channels | 2 channels |
| Dynamic Range | 127 dB |
| Standard Sampling Rate | 192 kS/s |
| Maximum Listed Sampling Rate | 768 kS/s |
| Digital Audio Interface | I2S |
| Analog Supply Voltage | 5 V nominal |
| Digital Supply Voltage Range | 3 V to 3.6 V |
| 工作溫度範圍 | -10°C to +70°C |
| 封裝 | 44-pin LQFP, 10 mm x 10 mm |
| 安裝類型 | Surface mount |
| Product Series | VERITA series, Audio 4 Pro family |
| Converter Technology | VELVET SOUND technology |
| RoHS 狀態 | Compliant |
AK5397EQ 44-pin lqfp, 10 mm x 10 mm 腳位配置指南
AK5397EQ（44-pin lqfp, 10 mm x 10 mm 封裝）的腳位配置。 此類比元件具有輸入、輸出與電源腳位。偏移歸零、補償與致能腳位配置請參閱製造商資料表。適用於訊號調理與放大器電路。
無詳細腳位定義資料： AK5397EQ.
請參閱 資料表 以查看完整腳位配置。
典型應用
AK5397EQ 適用於 6 應用s: Professional Digital Recording Console, High-Resolution Studio Monitor, Premium Home-Theater Processor, Digital Audio Mixer, Broadcast Audio Capture, Audiophile USB Listening System.
Professional Digital Recording Console
The AK5397EQ fits a professional recording console because it combines 32-bit stereo conversion, 127 dB dynamic range, and operation up to 768 kS/s for high-resolution capture. Place the converter on an analog input card, connect its I2S output to the console's digital processing engine, and operate the analog and digital domains from their specified 5 V and 3 V to 3.6 V rails. The high dynamic range preserves low-level detail during multitrack recording, while the dedicated stereo converter simplifies channel architecture compared with a multiplexed general-purpose ADC.
推薦
High-Resolution Studio Monitor
The AK5397EQ is appropriate for a studio monitor controller that converts balanced analog mixer or preamp outputs into a high-resolution digital stream. Its 32-bit resolution and 127 dB dynamic range provide ample headroom for program material, while the I2S interface can feed a digital signal processor or active crossover stage. The monitor design should preserve the converter's analog signal path, provide a quiet reference arrangement, and keep the 768 kS/s capability available only when the clock and downstream processing chain support it.
推薦
Premium Home-Theater Processor
The AK5397EQ can serve as the stereo ADC in a premium home-theater processor that accepts balanced analog sources and routes them into digital surround processing. Its 127 dB dynamic range and 32-bit conversion support low-level movie and music signals, while the I2S interface connects cleanly to an audio processor. Because the device is obsolete, a theater platform should secure supply before layout release, and the power design should isolate its 5 V analog rail from switching converter and digital processor noise.
推薦
Digital Audio Mixer
The AK5397EQ is suitable for each stereo input channel of a digital mixer because it provides two-channel conversion, 32-bit resolution, and a direct I2S digital output. A multi-channel mixer can use multiple converter instances feeding a common digital signal processor, simplifying synchronization and format conversion while preserving consistent conversion characteristics. The implementation should use a low-jitter master clock, matched input scaling, and separate analog and digital return paths to prevent converter activity from corrupting sensitive mix-bus signals.
推薦
Broadcast Audio Capture
The AK5397EQ can support broadcast and mastering capture subsystems that require stereo conversion with substantial dynamic range and flexible sampling capability. The 192 kS/s and 768 kS/s operating modes are useful for high-resolution production workflows, while the 127 dB specification gives converters and mastering engineers additional signal headroom. A broadcast installation should use a stable reference clock, carefully balanced analog inputs, and supply filtering that remains effective across the full 3 V to 3.6 V digital and nominal 5 V analog rails.
推薦
Audiophile USB Listening System
The AK5397EQ is suited to the analog-to-digital stage of a high-resolution audiophile listening system when the architecture requires 32-bit stereo conversion and a native I2S connection to a digital audio interface. Its 127 dB dynamic range supports playback of quiet, wide-dynamic-range recordings, while operation up to 768 kS/s can serve asynchronous high-resolution workflows. The front end still needs low-noise amplification, precision input attenuation, a clean reference, and short converter inputs to preserve the performance offered by the ADC.
推薦
推薦產品摘要
工程參考資料，適用於 AK5397EQ — 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 | 44-pin LQFP, 10 mm x 10 mm |
| Brand | Asahi Kasei Microdevices |
| Converter Type | 32-bit stereo delta-sigma audio ADC |
| Resolution | 32 bit |
| Channel Count | 2 channels |
| Dynamic Range | 127 dB |
| Maximum Sampling Rate | 768 kS/s |
| Digital Interface | I2S |
| Analog Supply | 5 V nominal |
| Digital Supply | 3 V to 3.6 V |
| Operating Temperature | -10°C to +70°C |
| RoHS Status | Compliant |
主要差異化特點
- Dedicated high-resolution stereo conversion (對比PCM1808PW)
- Flagship VERITA-series conversion technology (對比PCM1725DR)
- Native high-speed I2S conversion (對比WM8725CGED/R)
設計說明
Route the AK5397EQ analog inputs, reference connections, and supply decoupling as short, quiet nets, and keep the I2S clock and data traces away from the most sensitive analog input paths. Place the required input and bypass capacitors close to their associated pins, with their ground returns joining the appropriate analog or digital return plane through a controlled connection point. Follow the reference layout in the manufacturer datasheet when assigning the 44 LQFP footprint.
Treat the nominal 5 V analog rail and 3 V to 3.6 V digital rail as separate design domains. Decouple each rail directly at the appropriate device pins and avoid routing converter return current beneath the analog input or reference pins. Verify the recommended capacitor values, supply sequencing, and absolute maximum limits in the manufacturer datasheet. An analog regulator should be selected for low noise and appropriate stability with the required output and input capacitors.
Do not treat the obsolete lifecycle status as proof that every remaining unit is original, unused, or immediately deliverable. Confirm the exact AK5397EQ suffix, date code, storage condition, inspection history, quantity, and traceability through the Request a Quote process. Also avoid selecting a related AK5397-family MPN solely from its base number; verify the complete ordering information and compare every pin function before treating it as a drop-in replacement.
Use a low-jitter clock source and follow the manufacturer timing diagrams for I2S data, bit clock, and word-select behavior. Confirm that the audio processor supports the selected master or slave-clock arrangement and word alignment. Avoid adding long test pads or breakout branches to the digital bus, and validate the complete clock-to-data timing at the intended 192 kS/s or 768 kS/s operating mode with suitable measurement equipment.
合規資訊
The product listing identifies the AK5397EQ as RoHS compliant. This is an audio ADC and is not an automotive-qualified device.
