AK4458VN - 32-Bit 8-Channel 768kHz DAC | AKM
MPN: AK4458VN ✓ ActiveAK4458VN Overview
An audio DAC is a mixed-signal integrated circuit that converts digital PCM or DSD audio samples into analog voltage signals suitable for amplifiers and speakers. The AK4458VN belongs to the ADC/DAC hierarchy and combines a digital audio interface, digital signal processing, and eight analog output channels in one device. Its eight-channel architecture supports multichannel playback without requiring eight separate converter packages, while separate analog output stages provide flexibility for balanced or unbalanced signal routing.
Key features include 32-bit digital resolution, eight DAC channels, operation up to 768 kHz PCM, and support for 11.2 MHz DSD. The verified manufacturer data identifies AKM's VELVET SOUND architecture as the basis for the converter's low-distortion performance. The digital input supports I2S, and the device is intended for network-audio players, USB-DAC platforms, professional audio equipment, and automotive audio systems.
The AK4458VN combines a high-resolution digital processing section with eight analog output channels. This integration reduces the component count and board complexity of an eight-channel design while preserving independent conversion for every output. The 48-QFN package provides a compact implementation, but its exposed thermal pad requires careful PCB layout and adequate copper area for heat dissipation.
Typical uses include high-resolution network players, USB audio converters, home-theater receivers, multichannel preamplifiers, automotive infotainment systems, and studio monitoring equipment. In each case, the device can accept high-rate digital audio and generate eight analog channels while reducing the need for duplicated converter circuitry.
Designers should pay particular attention to analog and digital grounding, power-supply decoupling, exposed-pad soldering, and the datasheet-recommended output-stage network. The converter's package footprint does not by itself guarantee drop-in compatibility with another DAC: clocking, digital interface, analog topology, control registers, and pin functions must all be verified before substitution.
This product summary combines manufacturer specifications, distributor availability, package information, and application-focused engineering guidance to provide more practical procurement and design context than a basic manufacturer datasheet alone.
Drop-in alternatives for AK4458VN — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with AK4458VN (same form factor and footprint) — differing in Architecture, Device Type, Package.
No drop-in alternatives available for this product.
Request AlternativesAK4458VN Maximum Ratings & Electrical Characteristics
| Device Type | 8-channel premium audio digital-to-analog converter |
| Digital Resolution | 32 bit |
| Number of DAC Channels | 8 channels |
| Maximum PCM Input Rate | 768 kHz |
| Maximum DSD Input Rate | 11.2 MHz |
| Dynamic Range | 115 dB |
| Digital Audio Interface | I2S |
| Architecture | AKM VELVET SOUND |
| Package | 48-QFN (7 mm x 7 mm) |
| Package Type | QFN-48 with exposed pad |
| Mounting Type | Surface mount |
| Number of Pins | 48 pins |
| DSD Support | Up to 11.2 MHz |
| High-Resolution Audio Support | 32-bit PCM up to 768 kHz |
| Automotive Application Suitability | Supported as a target application |
AK4458VN qfn-48 with exposed pad Pin Configuration Guide
Pin configuration for AK4458VN (qfn-48 with exposed pad package). This analog component features input, output, and power supply pins. Refer to the manufacturer datasheet for offset null, compensation, and enable pin configurations. Ideal for signal conditioning and amplifier circuits.
No detailed pinout data available for AK4458VN.
Refer to the datasheet for full pin configuration.
Typical Applications
AK4458VN is suitable for 6 applications: High-Resolution Network Audio Player, USB High-Resolution Audio Converter, Eight-Channel Home-Theater Processor, Automotive Audio Head Unit, Professional Multichannel Studio Monitor, Multichannel Digital Audio Console.
High-Resolution Network Audio Player
The AK4458VN fits a high-resolution network audio player because it accepts 32-bit PCM up to 768 kHz and DSD up to 11.2 MHz while providing eight analog outputs. The manufacturer identifies network-audio playback as a target application. In an eight-channel network player, the converter can feed balanced or unbalanced preamplifier stages without requiring eight separate DAC packages. The implementation still depends on a compatible network-audio transport, I2S interface, low-jitter clocking, and the output network prescribed by the manufacturer datasheet.
Recommended
USB High-Resolution Audio Converter
The AK4458VN is suitable for a USB DAC because its I2S input, 32-bit processing, 768 kHz PCM capability, and 11.2 MHz DSD support cover demanding USB-audio formats. A USB-to-I2S bridge supplies the digital stream, while the AK4458VN performs eight-channel conversion. The principal engineering benefit is the integration of eight DAC channels in one 48-QFN device. Clock compatibility, digital isolation, rail sequencing, and an analog output filter remain board-level responsibilities.
Recommended
Eight-Channel Home-Theater Processor
The AK4458VN aligns well with an 8-channel home-theater preamplifier or receiver because its eight DAC outputs can drive the processing and amplifier stages of a surround-sound system. The 115 dB dynamic-range figure and support for 768 kHz PCM are useful for premium high-resolution playback, while the VELVET SOUND architecture targets low distortion. Design work must define channel mapping, synchronize the audio interface, and terminate every analog output according to the recommended application circuit.
Recommended
Automotive Audio Head Unit
The AK4458VN is applicable to automotive audio head units because the manufacturer explicitly identifies car-audio systems as a target use and offers eight DAC channels for multichannel cabin audio. High-resolution PCM and DSD inputs can support premium source compatibility, although the final vehicle interface must operate across automotive voltage and environmental conditions. The design must include suitable power regulation, transient protection, low-noise grounding, and verified qualification documentation for the exact ordering code.
Recommended
Professional Multichannel Studio Monitor
The AK4458VN can serve an eight-channel professional monitoring system because it combines eight DAC channels, 32-bit resolution, and a stated 115 dB dynamic range in one package. This allows monitoring controllers to accept a multichannel digital mix and produce eight analog outputs for balanced amplifier inputs. Its premium low-distortion architecture is relevant to accurate playback, but professional performance also depends on reference-grade supplies, symmetric output topology, calibration, channel alignment, and clock jitter control.
Recommended
Multichannel Digital Audio Console
The AK4458VN is a practical converter for a multichannel digital mixing console or recording playback section that requires eight analog outputs. Its I2S interface, 32-bit processing, 768 kHz PCM support, and 11.2 MHz DSD capability provide broad format support, while eight integrated channels simplify the converter section. The board should provide clean analog and digital rails, adequate exposed-pad thermal relief, separate return paths, and output networks selected for the intended balanced or unbalanced destination.
Recommended
Recommended Products Summary
Engineering reference data for AK4458VN — comparison, design guidance, and compliance information.
Selection Guide
Choose a lower-channel-count DAC when the product is fundamentally stereo and its measured performance meets the system requirement. A PCM5102A-based implementation may reduce complexity when only two outputs are needed, although four devices are required for eight stereo converter blocks. Do not select AK4452VN, AK4490EQ, or AK4458VN-L as an automatic PCB replacement: the supplied evidence does not establish the same 48-QFN footprint, pin functions, clocking, control registers, and analog output requirements. For any proposed substitute, perform a document-level review of the pinout, electrical limits, digital interface, exposed pad, and application circuit before committing to a drop-in replacement.
Comparison with Alternatives
| Parameter | This Product |
|---|---|
| Package | 48-QFN (7 mm x 7 mm) |
| Brand | Asahi Kasei Microdevices |
| Device Type | Premium audio DAC |
| DAC Channels | 8 channels |
| Digital Resolution | 32 bit |
| Maximum PCM Rate | 768 kHz |
| Maximum DSD Rate | 11.2 MHz |
| Dynamic Range | 115 dB |
| Digital Interface | I2S |
| Architecture | AKM VELVET SOUND |
Key Differentiators
- Eight DAC channels in one package (vs PCM5102A)
- Maximum PCM input rate (vs PCM5102A)
- Native DSD input capability (vs PCM5102A)
- Multichannel premium-converter positioning (vs AK4452VN)
Design Notes
The 48-QFN exposed pad is the principal thermal and electrical connection to the PCB. Follow the manufacturer land pattern and solder-mask guidance, and provide uninterrupted ground-plane copper beneath the device wherever the footprint permits. Do not assume that the package's compact 7 mm by 7 mm footprint eliminates thermal design: eight-channel DAC operation, nearby power regulators, and the board's copper area determine junction-temperature rise. Validate the assembled thermal path under maximum channel activity.
Separate analog and digital supply paths as far as practical, placing local high-frequency decoupling close to the associated power pins and the exposed pad. Keep the eight analog outputs away from clock and switching-regulator nodes, and route each output over a quiet reference plane. Differential routing should use closely matched geometry where the board stackup permits. Any grounded test points, shields, or guard structures near the outputs should be evaluated for their effect on the complete analog return path.
Do not substitute AK4458VN, AK4458VN-L, AK4452VN, or AK4490EQ without verifying the current datasheet, footprint, pin map, supported clocking, output circuitry, and control registers. Matching channel count or marketed resolution is not proof of drop-in compatibility. In particular, the AK4458VN-L price shown by LCSC belongs to a related suffix, while AK4452VN and AK4490EQ were mentioned only as general equivalents. Treat all three as unverified alternatives until their technical documents establish compatibility.
Plan the digital interface and clock routing before placing the analog output network. Use the manufacturer's recommended application circuit as the baseline for external resistors, capacitors, filters, and output topology. Verify that every one of the eight outputs receives the intended channel and that the digital interface is configured for the correct master-clock relationship. The 48-QFN package limits access to pads for rework, so schematic review, footprint verification, and programming-sequence testing are especially important before production.
Compliance Information
The verified data identifies automotive audio as an intended application but does not explicitly provide AEC-Q100 qualification, RoHS, REACH, lead-free, halogen-free, or conflict-minerals declarations. These values are therefore marked unknown rather than inferred.
