AK4440EF - 8-Channel 24-Bit 192kHz DAC | Asahi Kasei
Référence : AK4440EF ✗ Fin de vieAK4440EF Présentation
An audio DAC is a data converter that transforms digital audio samples into an analog voltage or current. The AK4440EF belongs to the digital-to-analog converter, audio data converter, signal-conversion IC, and power-management-aware semiconductor hierarchy. Unlike a basic resistor-network or delta-sigma converter, this device combines an eight-channel architecture, high-resolution operation, integrated analog output buffers, and a charge-pump-assisted output stage in one package.
The AK4440EF accepts 24-bit digital audio data and supports sampling rates up to 192 kHz. Its integrated output buffer generates a 2 Vrms full-scale output referenced to ground. The charge pump develops an internal negative supply rail, allowing the output stage to swing below ground without requiring a negative external analog supply. This architecture is useful in multichannel audio systems where eight balanced or unbalanced analog outputs are required.
AKM's multi-bit modulator architecture is the primary technical feature distinguishing this converter from many conventional delta-sigma implementations. The manufacturer describes the architecture as combining wide dynamic range with preserved linearity and improved THD+N performance. Because the analog outputs are integrated, the system designer does not need eight separate output-buffer ICs, reducing circuit area while maintaining consistent channel drive capability.
Typical applications include multichannel professional audio equipment, high-end consumer audio systems, AV receivers, digital mixing consoles, surround-sound processors, and audio interface hardware. A 192 kHz sampling capability supports high-resolution playback, while the eight-channel organization is suitable for cinema, music-production, and multi-zone audio architectures. The I2S interface allows the converter to operate directly with compatible digital audio processors.
The main design consideration is analog-output implementation. The 2 Vrms capability must be checked against downstream amplifier gain, headphone-driver limits, line-level input ranges, and coupling or filtering requirements. Layout should preserve short, symmetric analog output paths, provide a quiet supply network, and avoid routing digital clock and data signals beneath sensitive analog outputs. Grounding and return paths should follow the manufacturer's recommended application circuit.
This product summary combines the verified manufacturer datasheet, package and interface information, architectural details, application analysis, and engineering selection guidance. It also distinguishes confirmed characteristics from specifications that must be confirmed in the datasheet before a precision design is released.
Alternatives de remplacement direct pour AK4440EF — 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 alternativesAK4440EF Valeurs maximales et caractéristiques électriques
| Device Type | 8-channel audio digital-to-analog converter |
| Résolution | 24 bit |
| Maximum Sampling Rate | 192 kHz |
| Number of Output Channels | 8 channels |
| Digital Audio Interface | I2S |
| Tension d'alimentation | 5 V |
| Full-Scale Output | 2 Vrms |
| Output Buffer | Integrated per channel |
| Output Reference | Ground referenced |
| Internal Negative Rail | Charge-pump generated |
| Modulator Architecture | AKM multi-bit modulator |
| Boîtier | 30-VSOP |
| Nombre de broches | 30 pins |
| Type de montage | Surface mount |
Guide de configuration des broches du AK4440EF 30-vsop
Configuration des broches du AK4440EF (boîtier 30-vsop). 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 AK4440EF.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
AK4440EF convient pour 6 applications: Home Theater and Surround-Sound Processing, Professional Multi-Channel Audio Interface, High-End Network Audio Player, Digital Mixing Console and Studio Monitor Hub, Multichannel AV Receiver DAC Section, Multi-Zone Residential Audio System.
Home Theater and Surround-Sound Processing
The AK4440EF fits an eight-channel home theater signal path because it combines eight DAC channels, 24-bit resolution, operation up to 192 kHz, and integrated 2 Vrms output buffers. An I2S-compatible source can feed the converter while the eight analog outputs feed the appropriate surround and main-channel amplifier inputs. The integrated buffers reduce the number of external output-buffer stages, and the ground-referenced outputs simplify coupling to conventional line-level circuitry. The system integrator must still map channels correctly, provide the specified 5 V supply and decoupling, select suitable output filtering, and verify downstream amplifier gain and input impedance.
Recommandé
Professional Multi-Channel Audio Interface
The AK4440EF is suited to professional audio interfaces that require multiple synchronized analog outputs from a digital audio engine. Its 24-bit, 192 kHz capability supports high-resolution monitoring and mastering workflows, while eight integrated output buffers provide a consistent 2 Vrms full-scale target. A digital audio processor can supply I2S data and clocking, and the converter can feed balanced-input stages, monitor mixers, or line distribution circuits. Designers should confirm clock architecture, supported digital formats, output-current requirements, grounding strategy, and the exact pin assignments in the manufacturer documentation before finalizing the interface board.
Recommandé
High-End Network Audio Player
The AK4440EF can form the conversion stage of a high-end network or local audio player that accepts digital audio and produces eight analog channels. The 2 Vrms ground-referenced output is appropriate for line-level stages, while the internal charge-pump-generated negative rail supports the output buffer without an external negative analog supply. This can simplify the analog architecture around the converter. The design must preserve a clean digital-to-analog boundary, avoid digital routing beneath analog outputs, apply the recommended filtering, and account for the output level when setting preamp gain and digital volume headroom.
Recommandé
Digital Mixing Console and Studio Monitor Hub
The AK4440EF is appropriate for a digital mixing console or studio monitor hub requiring eight independently organized analog playback paths. The converter's 24-bit data width and 192 kHz sampling support high-resolution program material, while its integrated output buffers reduce external analog stages. The eight outputs can feed monitor controllers, line-level mixers, or balanced distribution inputs, depending on channel routing. Clocking must remain deterministic across all channels, and the analog output network should use controlled impedance and grounding to preserve channel consistency. Output-filter and reference-circuit choices should follow the manufacturer's application guidance.
Recommandé
Multichannel AV Receiver DAC Section
The AK4440EF can serve as the eight-channel conversion section of an AV receiver when the receiver requires independent front, surround, and related audio outputs. Its 192 kHz maximum rate supports high-resolution source formats, and the 2 Vrms buffered outputs can feed line-level gain stages before power amplifiers. The internal charge pump produces the negative rail needed for ground-referenced output swing, simplifying the external power arrangement. Designers should allocate channels in software and hardware, maintain a low-noise 5 V supply, separate clocking from analog routing, and confirm amplifier input ranges before selecting passive attenuation or gain components.
Recommandé
Multi-Zone Residential Audio System
The AK4440EF fits a multi-zone residential audio controller when the system requires eight buffered audio outputs distributed to separate amplification channels. A central audio processor can deliver synchronized I2S audio, and the converter provides matched 2 Vrms outputs for the zone preamplifiers. The high sample-rate capability supports lossless or high-resolution sources where the upstream transport supports them. Because each channel still requires routing, filtering, protection, and potentially a line driver, designers must match the converter output to downstream gain structures. Keep analog traces short, provide solid grounding, and verify every channel for noise, crosstalk, and clipping during production test.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour AK4440EF — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit |
|---|---|
| Brand | Asahi Kasei Microdevices |
| Package | 30-VSOP |
| Device Type | 8-channel audio DAC |
| Supply Voltage | 5 V |
| Resolution | 24 bit |
| Maximum Sampling Rate | 192 kHz |
| Digital Audio Interface | I2S |
| Output Channels | 8 channels |
| Full-Scale Output | 2 Vrms |
| Output Buffer | Integrated |
| Modulator Architecture | AKM multi-bit modulator |
| Lifecycle Status | Obsolete |
Principaux différenciateurs
- Eight integrated buffered channels in one converter (vs Two-channel PCM1725DR)
- Higher maximum sampling rate (vs PCM1808PW)
- Ground-referenced high-level output (vs PCM1725DR)
- Dedicated high-channel-count conversion (vs WM8723GEDT/R)
Notes de conception
Keep the eight analog output traces short and symmetrical, and route them away from I2S data, clock, and switching-regulator nodes. Use a continuous ground reference where the package construction permits, avoid vias in sensitive output paths, and place the manufacturer-recommended filtering and bypass components close to their associated pins. The layout should also separate digital return currents from analog output returns so switching activity does not add disturbance to the audio channels.
Implement the specified 5 V analog supply with low-impedance decoupling and verify ripple and transient performance at the device pins. Because the output buffer uses a charge pump to develop an internal negative rail, follow the exact recommended capacitor connections and values from the manufacturer application circuit. Do not substitute generic charge-pump capacitors without checking effective capacitance, voltage rating, leakage, and stability requirements.
Do not treat the 2 Vrms output specification as permission to drive an arbitrary load. Confirm output-current capability, load impedance, distortion, and stability for the connected headphone, line input, or amplifier stage. Also verify the digital clock mode, supported I2S format, channel alignment, and pin polarity before connecting a source processor; incorrect clock configuration can produce incorrect channel order or invalid output behavior.
Define the digital audio source and clocking architecture before PCB layout. Account for source impedance, cable or PCB loss, clock jitter, ground bounce, and simultaneous switching on the I2S bus. Keep clocks away from analog outputs and use source-series termination only when the manufacturer interface guidance calls for it. Validate channel mapping and full-scale output with a representative digital source before finalizing production test limits.
Informations de conformité
The confirmed EF ordering designation does not by itself establish lead-free, halogen-free, RoHS, or REACH status. These fields remain unknown until the manufacturer product page or material declaration confirms them.
