AK4438VN - 8-Channel 32-Bit 768kHz Audio DAC | Asahi Kasei
Référence : AK4438VN ✓ ActifAK4438VN Présentation
An audio DAC is a data-converter IC within the broader digital-to-analog converter, converter IC, signal-conversion, and semiconductor hierarchies. It reconstructs continuous analog audio signals from sampled digital data. The AK4438VN targets applications requiring multiple synchronized output channels, high-resolution playback, and accurate reconstruction of network-audio, USB-DAC, automotive, and home-audio content.
Principal features include 32-bit resolution, eight output channels, operation up to 768 kHz, and a 108 dB dynamic range. The newly developed 32-bit digital filter is specified for short group delay, which helps the converter reproduce high-resolution source material with reduced temporal smearing. Single-ended SCF outputs are intended to improve performance in systems where excessive clock jitter would otherwise degrade audio performance.
The AK4438VN accepts digital audio through an I2S-compatible interface and converts it into eight analog channels. Its dual-rate architecture supports conventional high-resolution audio while extending operation to 768 kHz PCM input rates. The exposed-pad QFN construction provides a thermal and electrical connection between the device and PCB copper, allowing heat to leave the package more effectively when the converter operates continuously at elevated power.
Typical uses include multichannel network-audio receivers, USB-DAC platforms, automotive infotainment systems, home-cinema equipment, digital mixing consoles, and multi-zone listening systems. Its eight outputs reduce the need for multiple discrete single-channel converters when several synchronized analog channels are required. The part can also serve evaluation and prototyping platforms for high-sample-rate PCM playback.
Designers must provide stable analog and digital supplies, route return currents carefully, and treat the exposed pad as a thermal and ground connection rather than an unused lead. Clock source quality and layout symmetry are important because converter performance can be degraded by supply noise, ground offsets, or data-line timing errors. Decoupling should follow the manufacturer datasheet recommendations closely.
This page consolidates the verified AK4438VN specifications, manufacturer and distributor sources, packaging details, application guidance, and a drop-in-alternative verification record. It also distinguishes verified replacement data from unverified generic cross-reference results, helping engineers avoid assuming that similar converter functions guarantee pin compatibility.
Alternatives de remplacement direct pour AK4438VN — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Aucune alternative de remplacement direct disponible pour ce produit.
Demander des alternativesAK4438VN Valeurs maximales et caractéristiques électriques
| Device Type | 8-channel audio digital-to-analog converter |
| Bit Resolution | 32 bit |
| Number of Channels | 8 channels |
| Maximum PCM Input Rate | 768 kHz |
| Dynamic Range | 108 dB |
| Digital Audio Interface | I2S |
| Analog Output Configuration | 8 single-ended SCF outputs |
| Digital Filter | Newly developed 32-bit digital filter |
| Digital Filter Group Delay | Short group delay |
| Clock Jitter Performance | SCF output architecture intended for improved performance with excessive clock jitter |
| Analog Supply Voltage Range | 1.7 V to 3.6 V |
| Plage de température de fonctionnement | -40 °C to +105 °C |
| Boîtier | 32-pin QFN, 5 mm x 5 mm |
| Package Thermal Feature | Exposed pad |
| Type de montage | Surface mount |
Guide de configuration des broches du AK4438VN exposed pad
Configuration des broches du AK4438VN (boîtier exposed pad). Ce composant analogique comporte des broches d'entrée, de sortie et d'alimentation. Consultez la fiche technique du fabricant pour les configurations des broches d'annulation d'offset, de compensation et d'activation. Idéal pour le conditionnement de signaux et les circuits amplificateurs.
Aucune donnée de brochage détaillée disponible pour AK4438VN.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
AK4438VN convient pour 6 applications: High-Resolution Network-Audio Player, USB Desktop DAC, Automotive Infotainment Audio, Home-Theater Multichannel DAC, Digital Mixing Console and Studio Monitor, Multi-Zone Audio System.
High-Resolution Network-Audio Player
The AK4438VN fits a high-resolution network-audio player that needs several synchronized analog outputs rather than separate single-channel converters. Its eight I2S-compatible output channels, 32-bit resolution, and operation up to 768 kHz support high-rate PCM streams delivered by a network audio engine. The 108 dB dynamic range gives the design headroom for quiet musical passages, while the short-group-delay 32-bit digital filter helps preserve timing. The implementation should use a low-jitter clock source, short digital routes, and the manufacturer-recommended supply decoupling so converter performance is not limited by the surrounding receiver design.
Recommandé
USB Desktop DAC
The AK4438VN is appropriate for a USB desktop DAC where an I2S interface and multiple analog outputs are required. Eight outputs can serve line-level, headphone, or powered-amplifier stages, subject to the output circuitry selected for each channel. The converter supports PCM input rates up to 768 kHz and 32-bit operation, which accommodates high-resolution source formats. Its single-ended SCF outputs are also intended to reduce sensitivity to excessive clock jitter, making a clean USB-to-I2S clock path particularly important. A practical design should isolate noisy USB and regulator stages from the converter supply and preserve symmetrical output routing.
Recommandé
Automotive Infotainment Audio
The AK4438VN can serve as the multichannel audio DAC in an automotive infotainment or cockpit-audio platform because it provides eight output channels and an operating range of -40 °C to +105 °C. The 32-bit conversion and 108 dB dynamic range suit high-fidelity playback, while multiple outputs can reduce the number of separate converter devices. Designers must still verify AEC-Q100 qualification and any automotive supplier-specific requirements because those details are not exposed in the supplied source. Signal-chain layout, ground partitioning, and protection from vehicle electrical transients are especially important around this high-performance converter.
Recommandé
Home-Theater Multichannel DAC
The AK4438VN is a strong fit for a home-theater preamplifier or multichannel DAC because eight analog outputs can feed powered speakers, line-level receivers, or active crossover channels without using eight discrete converters. The 108 dB dynamic range supports quiet movie and music passages, while the short-group-delay digital filter suits high-resolution content. A flexible system can also use fewer converter outputs for subwoofer or surround channels. Board design should keep the eight analog traces short, matched, and away from switching supplies and processor clock lines, with output buffering selected according to the intended load impedance.
Recommandé
Digital Mixing Console and Studio Monitor
The AK4438VN can support monitor-control and line-output sections in a digital mixing console or professional studio system. Its eight channels reduce the component count for synchronized monitoring routes, and the 32-bit conversion capability provides ample numerical headroom for mixing and gain staging. The converter supports rates up to 768 kHz, allowing it to fit high-resolution studio workflows when the preceding DSP and clocking architecture can supply those rates. The single-ended SCF output arrangement should be connected to a low-noise amplifier or active output stage, with balanced conversion performed afterward when required.
Recommandé
Multi-Zone Audio System
The AK4438VN is suitable for a multi-zone residential or hospitality audio system because eight converter channels can support several independent playback areas from one I2S source. A DSP can route the appropriate channels and sample data to the converter, while the AK4438VN provides consistent 32-bit conversion and a 108 dB dynamic range across the outputs. The eight-channel architecture simplifies synchronization compared with several unrelated converters, but the shared clock and data bus still require careful fan-out and termination planning. Output amplifier selection and grounding should be designed for each zone so that one channel does not create excessive loading or ground noise across the complete system.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour AK4438VN — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Do not select it merely by channel count when an exposed-pad 32-pin QFN, I2S clocking, and single-ended outputs do not match the system. A lower-channel or different-interface converter may be simpler and less demanding. The verified cross-reference results do not identify a pin-compatible AK4438VN substitute, so a same-package replacement should not be assumed. Before changing the PCB, verify every pin, power rail, clock mode, digital filter setting, analog output specification, and exposed-pad connection against the manufacturer datasheet.
Comparaison avec les alternatives
| Paramètre | Ce produit |
|---|---|
| Brand | Asahi Kasei Microdevices |
| Package | 32-pin QFN, 5 mm x 5 mm, exposed pad |
| Device Type | 8-channel audio DAC |
| Bit Resolution | 32 bit |
| Maximum PCM Input Rate | 768 kHz |
| Dynamic Range | 108 dB |
| Digital Audio Interface | I2S |
| Analog Output Configuration | 8 single-ended SCF outputs |
| Analog Supply Voltage Range | 1.7 V to 3.6 V |
| Operating Temperature Range | -40 °C to +105 °C |
Principaux différenciateurs
- Eight-channel integration reduces the number of separate DAC devices required in multichannel audio equipment. (vs A single-channel audio DAC)
- Supports exceptionally high-rate PCM playback for high-resolution source material. (vs A conventional 192 kHz-class audio DAC)
- Uses a short-group-delay 32-bit digital filter intended for high-quality sound reproduction. (vs A standard filter-mode audio converter)
- SCF single-ended outputs are designed to improve performance when clock jitter is excessive. (vs A converter using conventional single-ended outputs)
Notes de conception
Route the eight analog outputs as short, mutually consistent traces and keep them away from digital clocks, switching-regulator nodes, and high-current output stages. Place the datasheet-recommended input, output, and internal regulators bypass capacitors directly at their associated pins. The verified material does not provide exact capacitor values, so component selection and placement must follow the manufacturer guidance rather than an inferred generic network.
Treat the exposed pad as both a thermal path and a package connection whose net assignment is defined by the manufacturer datasheet. Provide a low-impedance via array into the relevant PCB plane and avoid thermal relief that increases the pad temperature rise. For eight continuously active output channels, confirm converter dissipation and adjacent amplifier heat with a board-level thermal test, especially when the device is installed in a closed audio enclosure.
Use a low-jitter clock source and preserve the relationship between the digital audio data, bit clock, and word clock across the entire I2S path. Match data and clock trace geometry where practical, provide a continuous reference plane, and avoid routing the interface next to high-current analog outputs. Because the AK4438VN uses SCF outputs specifically to improve performance in systems with excessive clock jitter, clock quality should be measured at the converter rather than inferred from the upstream source.
Do not substitute a converter merely because it also has eight channels. A valid replacement must match the 32-pin 5 x 5 mm QFN land pattern, pin assignments, I2S clocking behavior, power rails, output type, and filter configuration. The supplied cross-reference search returned generic tools rather than a verified pin-compatible replacement, so any new candidate should be checked against the exact AK4438VN manufacturer pinout before PCB or firmware changes are approved.
Informations de conformité
The supplied verified snippets do not expose explicit RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals statements. Compliance must be confirmed from the current manufacturer product page or applicable manufacturer declaration before production release.
