AK5558VN - 32-bit 768kHz 8ch Audio ADC, 64-QFN | AKM
MPN: AK5558VN ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $13.0689 | $13.07 |
AK5558VN Overview
An audio ADC (analog-to-digital converter) is a specialized data converter that translates continuous analog audio signals into high-fidelity digital codes using delta-sigma modulation and decimation filtering. Premium audio ADCs target professional recording, broadcast, and high-resolution consumer audio where dynamic range, channel count, and low noise floor matter more than raw sampling speed. The AK5558VN sits inside the data converter IC family and the broader signal-conditioning semiconductor category.
Key features include differential analog inputs on all eight channels, four selectable digital filters (sharp roll-off, slow roll-off, short delay, and low-latency), 32-bit PCM output up to 768 kHz, DSD output up to 11.2 MHz, and TDM audio interface support for direct connection to a DSP. AKM's multi-bit delta-sigma architecture combines with channel summation (2-to-1, 4-to-1, 8-to-1) to deliver 118 dB dynamic range when channels are averaged, enabling mixer-grade recording performance.
Typical applications include professional mixing consoles, multi-channel studio recorders, USB audio interfaces, AV receivers with multichannel capture, and automotive premium audio head units. The device's 64-QFN exposed-pad package provides the thermal performance required for sustained 8-channel operation at 768 kHz.
When designing with this part, place decoupling capacitors as close as possible to the AVDD and LVDD pins, and short the exposed pad to a solid ground plane for thermal dissipation. Verify TDM slot mapping with your DSP before PCB layout finalization.
Drop-in alternatives for AK5558VN — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
AK5558VN-L
✅ Drop-In📋 Reference alternative (not in catalog)
AK5554VN
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
AK5556VN
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
AK5558VN Maximum Ratings & Electrical Characteristics
| Resolution | 32-bit |
| Number of Channels | 8 |
| Sampling Rate (PCM) | Up to 768 kHz |
| DSD Output Rate | Up to 11.2 MHz |
| Dynamic Range | 115 dB (single channel), 118 dB (8-to-1 summation) |
| S/(N+D) | 106 dB |
| Input Type | Differential analog input |
| Digital Filters | 4 selectable (sharp, slow, short-delay, low-latency) |
| Audio Interface | TDM, I2S, DSD |
| Number of Converters | 1 |
| Architecture | Multi-bit Delta-Sigma |
| Package | 64-QFN (9x9 mm) with Exposed Pad |
| Mounting Type | Surface Mount |
| Category | Audio A/D Converter IC |
AK5558VN Pin Configuration
| Pin 1 | AVDD — Analog power supply |
| Pin 16 | LVDD — Digital interface power supply |
| Pin 17 | DVDD — Digital core power supply |
| Pin 32 | GND — Ground reference |
| Pin 33 | EPAD — Exposed thermal pad - connect to ground |
| Pin 64 | NC — Not connected (per datasheet) |
Typical Applications
AK5558VN is suitable for 6 applications: Professional Mixing Console, USB Audio Interface, AV Receiver Multichannel Capture, Studio Multitrack Recorder, Automotive Premium Audio Head Unit, Professional Microphone Preamp with Digital Output.
Professional Mixing Console
Multi-channel live and studio mixing consoles demand high-channel-count ADCs with extremely low noise floor to capture every microphone preamp output without coloration. The AK5558VN's 8 differential inputs, 115 dB dynamic range, and 32-bit/768 kHz capability provide ample headroom for gain-riding fader automation and parallel compression workflows. Channel summation further extends dynamic range to 118 dB, which is critical when summing multiple preamp outputs into a single bus. The TDM interface simplifies routing to the on-board DSP for EQ and dynamics.
Recommended
USB Audio Interface
High-end USB audio interfaces for studio recording require premium ADCs that pair with XMOS or similar USB audio class 2.0 controllers. The AK5558VN's 32-bit/768 kHz PCM and DSD up to 11.2 MHz output meet the demands of audiophile-grade capture, while the TDM mode simplifies digital handoff to the host DSP for ASIO/WDM routing. The 8-channel density enables 7.1 surround recording interfaces with a single ADC chip, reducing BOM cost and PCB complexity. Low power consumption also benefits bus-powered USB designs.
Recommended
AV Receiver Multichannel Capture
Modern AV receivers with multichannel HDMI audio return and analog inputs require premium ADCs to capture legacy analog sources and HDMI-eARC returned audio. The AK5558VN's 8 differential inputs handle 7.1 surround analog sources at 115 dB dynamic range, while its selectable digital filters (sharp/slow/short-delay/low-latency) allow tuning for video post-processing delays. The TDM audio interface simplifies connection to the AV receiver's main DSP for room correction and surround decoding.
Recommended
Studio Multitrack Recorder
Standalone multitrack studio recorders for field and studio capture need 8-channel simultaneous sampling at high resolution. The AK5558VN's 32-bit/768 kHz capability captures the full dynamic range of condenser microphones with 24 dB headroom above 0 dBFS for transient peaks. DSD output up to 11.2 MHz enables DSD256 recording for audiophile archival applications, while the four digital filter options let engineers select transient response characteristics. Channel summation in 8-to-1 mode provides 118 dB dynamic range for ambient/room mic arrays.
Recommended
Automotive Premium Audio Head Unit
Premium automotive head units with multichannel microphone arrays for active noise cancellation, hands-free calling, and cabin recording require reliable high-channel-count ADCs. The AK5558VN's 8 differential inputs support multiple microphone inputs with high common-mode rejection, while 115 dB dynamic range captures both quiet cabin ambience and loud engine harmonics. The exposed-pad 64-QFN package provides thermal headroom for sustained 8-channel operation at elevated automotive ambient temperatures.
Recommended
Professional Microphone Preamp with Digital Output
High-end 8-channel microphone preamps with AES42 or network digital outputs require premium ADCs that preserve the full dynamic range of the analog front end. The AK5558VN's 115 dB dynamic range and differential architecture pair with low-noise microphone preamps (e.g., THAT 1510/1512 or similar) to deliver transparent capture. The 32-bit output maintains bit depth for downstream mixing and processing in the DAW, while the selectable digital filters allow tuning for vocal warmth (slow roll-off) or transient accuracy (sharp roll-off).
Recommended
Engineering reference data for AK5558VN — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | AK5558VN-L | AK5554VN | AK5556VN | AD1938YSTZ |
|---|---|---|---|---|---|
| Package | 64-QFN (9x9 mm) | 64-QFN (9x9 mm) - same | 64-QFN (9x9 mm) - same | 64-QFN (9x9 mm) - same | 64-LQFP - different footprint |
| Brand | AKM | AKM | AKM | AKM | Analog Devices |
| Resolution | 32-bit | 32-bit | 32-bit | 32-bit | 24-bit |
| Number of Channels | 8 | 8 | 4 | 6 | 8 |
| Maximum Sampling Rate | 768 kHz PCM / 11.2 MHz DSD | 768 kHz / 11.2 MHz | 768 kHz / 11.2 MHz | 768 kHz / 11.2 MHz | 192 kHz / - |
| Dynamic Range | 115 dB (118 dB summation) | 115 dB | 115 dB | 115 dB | 105 dB |
| S/(N+D) | 106 dB | 106 dB | 106 dB | 106 dB | 94 dB |
| Digital Filters | 4 selectable | 4 selectable | 4 selectable | 4 selectable | Sharp/slow |
Key Differentiators
- Highest channel count in same AKM 555x family at full 32-bit/768 kHz (vs AK5554VN)
- 32-bit resolution vs 24-bit alternatives (vs AD1938YSTZ)
- DSD output up to 11.2 MHz vs no DSD support (vs AD1938YSTZ)
Design Notes
Place decoupling capacitors as close as possible to the AVDD, LVDD, and DVDD pins of the AK5558VN. Use 10uF bulk ceramic plus 0.1uF high-frequency bypass on each supply pin. The exposed thermal pad (EPAD) MUST be soldered to a solid ground plane with thermal vias for 8-channel sustained operation at 768 kHz. Independent analog and digital ground regions should meet only at a single star point near the ADC's GND pin to avoid digital switching noise coupling into the analog input network.
Route the eight differential analog input pairs as tightly-coupled 50-ohm differential traces, with matched length to within 0.5 mm between the P and N sides of each pair. Keep analog inputs away from digital TDM/DSD traces and clock lines. Use ground pours on adjacent layers for shielding. For DSD output up to 11.2 MHz, treat DSD data lines as 100 MHz-class signals and apply 50-ohm controlled impedance routing with series termination at the source.
Verify TDM slot mapping, BCLK polarity, and LRCK edge alignment with your target DSP before PCB layout finalization. Mismatched TDM slot mapping causes channels to be misassigned silently. For DSD mode, ensure the MCLK-to-DSD-rate ratio is configured per the datasheet (typically 256fs or higher). When using channel summation (2-to-1, 4-to-1, 8-to-1), configure the digital filter type to support the summation mode. Do not connect the EPAD to a noisy digital ground - this will inject switching noise into the analog inputs.
Compliance Information
RoHS and REACH compliance per AKM product page and DigiKey listing. Not AEC-Q100 qualified - for automotive AEC-Q100 requirements, evaluate AK5558VN's automotive suitability separately. Halogen-free status not confirmed in provided data.
