AK4499EQ - 32-Bit 4-Channel Audio DAC | Asahi Kasei
部品番号: AK4499EQ ✓ 生産中AK4499EQ 概要
A DAC is a digital-to-analog converter that transforms PCM, DSD, or other digital audio samples into continuous analog voltage signals for amplification and loudspeaker reproduction. The AK4499EQ belongs to the broader digital-to-analog converter hierarchy and uses a switched-resistor architecture intended to provide low distortion and low noise in high-resolution audio equipment.
The AK4499EQ supports four DAC channels and multiple digital audio interfaces, including PCM, DSD, and EXDF formats. Its maximum PCM rate is 768 kHz, while its maximum DSD rate is DSD512. These capabilities suit high-resolution network players, USB DACs, professional audio equipment, digital mixing consoles, and premium home-audio systems. Configuration is supported through I2C and 3-wire serial register control.
The switched-resistor conversion architecture separates the conversion function from conventional current-source ladder behavior and is intended to improve linearity and reduce distortion. The manufacturer describes the device as a premium four-channel DAC aimed at applications where low distortion, low noise, and support for very high-resolution source material are priorities. Operation can be configured for use with internal LDO regulation or external analog supplies, providing flexibility in power-supply implementation.
Typical implementations place the converter between a digital audio receiver such as AK4118 and a high-quality analog output stage. AK4499EX is associated with related AK4499-family designs, while AK4191EQ appears in architectures using an AKM digital interface and converter chipset. The four-channel structure also permits balanced or multichannel output arrangements when the surrounding circuitry supports the converter's channel organization.
PCB design requires close attention to the exposed-pad package, analog and digital supply routing, and separation of high-speed digital interfaces from sensitive analog outputs. Place output capacitors and analog routing in accordance with the manufacturer reference layout, keep the exposed pad properly connected to the ground plane, and decouple each supply domain close to its pins. The 14 mm by 14 mm footprint makes thermal management and analog-layout planning more demanding than in a small QFN audio converter.
This product page combines the manufacturer datasheet information with practical interface, application, package, and replacement guidance. It also distinguishes verified AK4499EQ characteristics from functional alternatives so engineers can determine whether a candidate is a true pin-compatible replacement or merely a different premium DAC architecture.
ドロップイン代替品: AK4499EQ — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: AK4499EQ （同一形状・フットプリント） — 相違点: Package.
この製品に利用可能なドロップイン代替品はありません。
代替品をリクエストAK4499EQ 最大定格＆電気的特性
| Product Type | 32-bit four-channel switched-resistor audio DAC |
| 分解能 | 32 bit |
| Number of DAC Channels | 4 channels |
| Minimum PCM Sampling Rate | 8 kHz |
| Maximum PCM Sampling Rate | 768 kHz |
| Maximum DSD Rate | DSD512 |
| Supported Audio Interfaces | PCM, DSD, and EXDF |
| Register Control Interface | I2C and 3-wire serial |
| Conversion Architecture | Switched-resistor |
| Power Supply Configuration | Internal LDO or external analog supply |
| パッケージ | 128-pin HTQFP with exposed pad, 14 mm x 14 mm |
| 実装タイプ | Surface mount |
| Typical Application | High-resolution network audio and USB-DAC systems |
AK4499EQ 128-pin htqfp with exposed pad, 14 mm x 14 mm ピン配置ガイド
AK4499EQ (128-pin htqfp with exposed pad, 14 mm x 14 mm パッケージ) のピン配置。 このアナログコンポーネントは、入力、出力、および電源ピンを備えています。オフセットナル、補償、イネーブルピンの設定については、メーカーのデータシートを参照してください。信号調整やアンプ回路に最適です。
詳細なピン配置データはありません: AK4499EQ.
詳細は データシート をご参照ください。
主な用途
AK4499EQ の用途: 6 件s: High-Resolution Network Audio Player, USB Desktop DAC, Professional Audio Monitoring DAC, Digital Mixing Console, Multichannel Hi-Fi DAC, Premium Portable Audio System.
High-Resolution Network Audio Player
The AK4499EQ fits a premium network player that accepts very high-resolution PCM and DSD sources because its 32-bit conversion section supports PCM from 8 kHz to 768 kHz and DSD512 input. Four channels also provide flexibility for stereo, multichannel, or balanced-output arrangements. The device should follow a compatible digital audio receiver such as AK4118, with low-jitter clocking and carefully separated analog and digital power domains. Its 128-pin HTQFP package requires substantial routing space, so the converter is most appropriate when performance and channel flexibility justify a larger, carefully engineered board.
おすすめ
USB Desktop DAC
The AK4499EQ is well suited to a desktop USB DAC requiring very high-resolution PCM and native DSD reproduction. Its maximum PCM rate of 768 kHz and DSD512 capability allow compatible host interfaces to pass very high-rate material to the converter, while the switched-resistor architecture targets low distortion and low noise. The design should use a USB audio interface with a clean asynchronous clocking arrangement, separate digital and analog supply filtering, and an output stage matched to the converter's four-channel organization. Because the package is a 14 mm by 14 mm HTQFP, adequate routing density and exposed-pad thermal management are essential.
おすすめ
Professional Audio Monitoring DAC
AK4499EQ can serve as the conversion stage in a professional monitoring DAC where very high sampling rates, low distortion, and flexible channel routing are important. Its four-channel architecture supports balanced and multichannel monitoring arrangements, while support for PCM, DSD, and EXDF allows the front end to accept different source formats. For a studio implementation, the converter should be paired with a low-jitter digital interface, isolated analog supplies, and a balanced output stage with very low distortion. The large HTQFP footprint makes controlled thermal design and symmetrical analog routing essential for repeatable channel performance.
おすすめ
Digital Mixing Console
The AK4499EQ can contribute high-resolution conversion capability to a digital mixing console or multichannel signal processor. Four DAC channels allow one device to address several monitoring or line-output channels, and the 768 kHz PCM ceiling supports high-rate processing workflows. The implementation must ensure that the digital transport supplies correctly formatted data and that each converter channel receives suitable clocking and analog reference conditions. The exposed-pad HTQFP package requires a solid thermal design, while the analog outputs should be routed away from high-speed digital signals and switching regulators to preserve the low-noise performance expected from a premium converter.
おすすめ
Multichannel Hi-Fi DAC
AK4499EQ is appropriate for a multichannel hi-fi converter using the device's four-channel switched-resistor DAC architecture. PCM and DSD support permits the same converter platform to handle conventional high-resolution audio and DSD512 material, while internal-LDO or external analog-supply operation gives the designer flexibility in rail management. A multichannel implementation should assign outputs symmetrically, maintain matched digital routing lengths where timing sensitivity matters, and place analog output components close to their corresponding converter pins. The 128-pin package offers extensive configuration connectivity but demands a disciplined ground, decoupling, and exposed-pad strategy.
おすすめ
Premium Portable Audio System
The AK4499EQ can support a premium portable or compact audio system when high-resolution playback justifies its converter capability and larger package. PCM operation up to 768 kHz and DSD512 support provide compatibility with high-rate sources, while I2C or 3-wire serial control simplifies configuration in a custom digital subsystem. Portable-product implementation requires careful attention to board area, exposed-pad heat spreading, power-conversion efficiency, and battery-related supply noise. The converter should still be isolated from display, wireless, and switching circuitry to protect its low-noise analog performance.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: AK4499EQ — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
設計ノート
Use the manufacturer datasheet's 128-pin HTQFP land pattern, pin table, and exposed-pad guidance without modification. Keep analog and digital returns separate until the converter's specified grounding point, place input and output decoupling close to the associated pins, and route high-speed digital interfaces away from the analog output region. The exposed pad should use the manufacturer's recommended via pattern and connect to the specified ground plane so heat is transferred without compromising analog return control.
Evaluate both supported supply architectures before laying out the board. When using the internal LDO, follow the manufacturer input and output capacitor requirements exactly. When using an external analog supply, preserve the converter's specified analog-rail conditions and filtering. Keep switching regulators and their inductors away from sensitive analog output nodes, and provide local high-frequency bypass at the supply pins to reduce coupling into the four output channels.
Treat the exposed pad as both a thermal and layout feature. Provide a continuous, low-impedance ground connection beneath the package, use the datasheet's recommended thermal-via pattern, and avoid placing a narrow thermal cutout where it would impede heat transfer. Validate junction and case temperature in the final enclosure, especially when the converter operates continuously at high sample rates or drives downstream circuitry through sustained high-power conditions.
Maintain a low-jitter and determinate digital clock path, because the AK4499EQ supports PCM rates up to 768 kHz and DSD512. Keep clock, data, and ground routing short, observe interface timing requirements from the manufacturer datasheet, and avoid unnecessary stubs or test points that create discontinuities. Separate the digital interface section from the analog output section so switching activity does not couple directly into the sensitive switched-resistor conversion and output network.
Do not treat ES9038PRO, ES9039PRO, ES906K, PCM5222, or WM828 as automatic replacements merely because they are premium audio DACs. A valid board-level substitute must match the package footprint, exposed-pad connection, pin assignments, supply voltages, clock interface, digital formats, and reset or control behavior. Also verify channel mapping and output polarity in software, because a functional audio role does not establish register or pin compatibility.
コンプライアンス情報
No specific RoHS, REACH, lead-free, halogen-free, or conflict-minerals declaration appears in the retrieved product information. AEC-Q100 qualification is not applicable to this audio DAC based on the available documentation.
