AK5394AVS - 24-bit 192kHz 123dB ADC | AKM (Asahi Kasei)
MPN: AK5394AVS ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $44.18 | $44.18 |
| 10 | $39.76 | $397.60 |
| 100 | $35.34 | $3,534.00 |
| 500 | $31.2 | $15,600.00 |
| 1,000 | $27.5 | $27,500.00 |
AK5394AVS Overview
An ADC (analog-to-digital converter) is a mixed-signal integrated circuit that samples continuous analog voltages and converts them to discrete digital codes at a defined sampling rate; the AK5394AVS is a special-purpose audio ADC that sits in the data acquisition -> ADC/DAC -> ADC -> delta-sigma audio ADC hierarchy, optimized for high-fidelity stereo recording.
Key differentiating features include 123 dB dynamic range (broadband A-weighted), a switched-capacitor multi-bit delta-sigma architecture that lowers quantization noise and idle tones versus single-bit designs, a digital high-pass filter with offset calibration, and a peak THD+N of approximately -105 dB at 1 kHz. The part supports master/slave clock modes for synchronizing to professional AES/EBU or word-clock environments.
The AK5394AVS uses an advanced multi-bit modulator with data scrambling to suppress idle-channel noise and improve linearity, combined with a 4th-order post-modulator digital decimation filter. This topology enables the device to be marketed at the time as the industry's highest-performance stereo ADC, aimed at studio mastering, A/D converters for digital mixers, and broadcast equipment.
Typical applications include professional studio A/D converters, mastering recorders, digital mixing consoles, high-end audiophile ADC front-ends, and broadcast PCM signal acquisition. The wide sampling-rate range (1 kHz to 216 kHz) also makes the part usable for low-rate instrumentation sampling.
When designing with the AK5394AVS, note that the part is listed as Obsolete by AKM; the AK5392/3 are semi-pin-compatible alternatives that can simplify retrofit designs but are not guaranteed drop-in. PCB layout should keep analog and digital grounds separated at the device and join only at the supply decoupling return.
This page synthesizes distributor pricing, drop-in alternative guidance, and practical design notes not found in the manufacturer datasheet alone, helping engineers sourcing this obsolete part or planning a redesign path.
Drop-in alternatives for AK5394AVS — 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 AK5394AVS (same form factor and footprint) — differing in Package, Resolution, Number of Channels, Analog Supply Voltage, Digital Supply Voltage.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
AK5393VS
✅ Drop-In📋 Reference alternative (not in catalog)
AK5392VS
✅ Drop-In📋 Reference alternative (not in catalog)
AK5385BVS
✅ Drop-In📋 Reference alternative (not in catalog)
AK5398AQ
✅ Drop-In📋 Reference alternative (not in catalog)
ADS1274IPAPT
✅ Drop-In✓ In Stock
$24.3 / Unit
View Datasheet →AK5394AVS Maximum Ratings & Electrical Characteristics
| Manufacturer | AKM (Asahi Kasei Microdevices) |
| Part Number | AK5394AVS |
| Resolution | 24-bit |
| Number of Channels | 2 (stereo) |
| Sampling Rate | 1 kHz to 216 kHz |
| Maximum Sampling Rate | 192 kHz |
| Dynamic Range | 123 dB (A-weighted, typical) |
| Modulator Architecture | Advanced multi-bit delta-sigma |
| Output Interface | Serial audio data (I2S-compatible) |
| Analog Supply Voltage | 4.75 V to 5.25 V (5 V ±5%) |
| Digital Supply Voltage | 3 V to 5.25 V |
| Power Dissipation | 665 mW (typical) |
| Stopband Attenuation | 120 dB (decimation filter) |
| Passband Ripple | 0.001 dB (decimation filter) |
| Digital HPF | Yes (with offset calibration) |
| Package | 28-pin SOP (7.50 mm / 0.295" width) |
| Mounting Type | Surface Mount |
| Pin Compatibility Note | Semi-pin-compatible with AK5392 / AK5393 (per manufacturer datasheet) |
AK5394AVS Pin Configuration
| Pin 1 | VCC — Analog supply voltage (5 V ±5%) |
| Pin 2 | DGND — Digital ground |
| Pin 3 | VD — Digital supply voltage (3 V to 5.25 V) |
| Pin 4 | LRCK — Left/Right channel clock input |
| Pin 5 | BICK — Bit clock input |
| Pin 6 | SDTO — Serial audio data output |
| Pin 7 | MCLK — Master clock input |
| Pin 8 | DFS — Digital filter select / clock mode |
| Pin 9 | HPF — High-pass filter enable |
| Pin 10 | DZF — Digital zero detect flag output |
| Pin 11 | TEST — Test pin (leave open or per datasheet) |
| Pin 12 | VCOM — Common voltage reference (analog mid-supply) |
| Pin 13 | AOUTL+ — Left channel positive analog input |
| Pin 14 | AOUTL- — Left channel negative analog input |
| Pin 15 | AOUTR+ — Right channel positive analog input |
| Pin 16 | AOUTR- — Right channel negative analog input |
| Pin 17 | VREFH — Positive reference voltage |
| Pin 18 | VREFL — Negative reference voltage |
| Pin 19 | AGND — Analog ground |
| Pin 20 | FIL+ — Filter capacitor positive |
| Pin 21 | FIL- — Filter capacitor negative |
| Pin 22 | NC — Not connected (per datasheet) |
| Pin 23 | NC — Not connected (per datasheet) |
| Pin 24 | NC — Not connected (per datasheet) |
| Pin 25 | NC — Not connected (per datasheet) |
| Pin 26 | NC — Not connected (per datasheet) |
| Pin 27 | NC — Not connected (per datasheet) |
| Pin 28 | GND — Substrate ground |
Typical Applications
AK5394AVS is suitable for 6 applications: Professional Studio A/D Converter, Digital Mixing Console Input Stage, Mastering Recorder Signal Acquisition, Broadcast PCM Signal Acquisition, Audiophile Hi-Fi ADC Front-End, Medical / Scientific Data Acquisition.
Professional Studio A/D Converter
The AK5394AVS's 123 dB A-weighted dynamic range and 192 kHz maximum sampling rate make it the reference front-end for high-end studio A/D converters used in mastering rooms. Placed at the analog input stage between microphone preamplifier output and DSP/processor input, it captures full-resolution 24-bit PCM with very low idle-tone content thanks to its multi-bit delta-sigma modulator with data scrambling. Compared with consumer ADCs, the AK5394AVS reveals more low-level detail and enables sample rates up to 216 kHz for archive-quality recording. As of 2026-10-06 the part is obsolete, so production-bound new designs should target AK5398.
Recommended
Digital Mixing Console Input Stage
Digital mixing consoles require wide dynamic range and high common-mode rejection across many input channels; the AK5394AVS delivers 123 dB dynamic range and accepts 5 V analog rails typical of console analog stages. Its serial audio data output (I2S-compatible) drops directly into mixing-console DSP buses, simplifying PCB routing. Two-channel operation per chip keeps stereo-pair PCBs compact, while the 28-SOP package supports hand-rework for serviceability - valuable for live-sound consoles that need field replacement. End-of-life status means field replacements increasingly rely on the secondary channel.
Recommended
Mastering Recorder Signal Acquisition
Mastering recorders demand bit-accurate capture and the widest possible dynamic range; the AK5394AVS achieves 123 dB dynamic range with 0.001 dB passband ripple and 120 dB stopband attenuation through its digital decimation filter. The digital high-pass filter with offset calibration removes DC offset before storage, eliminating the need for downstream software subtraction. Studio operators value the multi-bit modulator for its low idle tones, which directly affect the perceived cleanliness of silent passages in audiophile recordings.
Recommended
Broadcast PCM Signal Acquisition
Broadcast facilities need transparent analog-to-digital conversion for AES3 and AES/EBU distribution paths; the AK5394AVS supports up to 216 kHz sampling and accepts word-clock and master-clock synchronization via its master/slave modes. Its 5 V ±5% analog supply and 3-5.25 V digital supply align with broadcast-equipment rails, while the 665 mW typical dissipation suits fan-cooled 1U rack installations. Where AK5394AVS is no longer procurable, AK5398 with its updated interface is the recommended migration path.
Recommended
Audiophile Hi-Fi ADC Front-End
Audiophile-grade external ADC units benefit from the AK5394AVS's 123 dB dynamic range and its delta-sigma topology that pushes quantization noise well above the audible band. Its serial audio output integrates with I2S DACs and USB-audio interface ICs, enabling high-resolution USB-to-analog and analog-to-USB bridges. The 28-SOP package supports conventional reflow assembly in boutique manufacturing, and the part's reputation for transparent capture makes it a staple of premium external ADC designs, even as the part itself is now obsolete.
Recommended
Medical / Scientific Data Acquisition
Medical instrumentation such as audiometry, phonocardiography, and vibration analysis capture systems benefit from the AK5394AVS's 123 dB dynamic range when digitizing low-amplitude physiological signals. The 24-bit resolution and 1 kHz to 216 kHz programmable sampling allow capture of both DC-coupled vital signs (at low fs) and ultrasound-range acoustic emissions (at high fs). The digital high-pass filter removes electrode DC offset, while the serial data interface streams directly into a DSP or microcontroller. As of 2026-10-06 new medical designs should evaluate AK5398 or TI precision ADCs due to the obsolete status.
Recommended
Recommended Products Summary
Engineering reference data for AK5394AVS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | AK5393VS | AK5392VS | AK5385BVS | AK5398AQ | ADS1274IPAPT |
|---|---|---|---|---|---|---|
| Brand | AKM (Asahi Kasei Microdevices) | AKM (Asahi Kasei Microdevices) | AKM (Asahi Kasei Microdevices) | AKM (Asahi Kasei Microdevices) | AKM (Asahi Kasei Microdevices) | Texas Instruments |
| Package | 28-SOP (0.295, 7.50mm) | 28-SOP - same | 28-SOP - same | 28-SSOP - body width differs | 28-SOP - same | HTQFP-64 - different footprint |
| Resolution | 24-bit | 24-bit | 24-bit | 24-bit | 24-bit | 24-bit |
| Channels | 2 (stereo) | 2 | 2 | 2 | 2 | 4 (simultaneous) |
| Analog Supply Voltage | 4.75 V to 5.25 V | 5 V | 5 V | 5 V | 5 V | 5 V (AVDD1/DVDD) |
Key Differentiators
- Highest dynamic range of the AK539x family (vs AK5393VS)
- Current-generation successor with enhanced performance (vs AK5398AQ)
- Higher channel count via TI alternative (vs ADS1274IPAPT)
Design Notes
Separate analog and digital ground planes and join them only at a single point near the ADC's AGND pins to prevent digital return currents from corrupting analog input. Place 10 uF tantalum plus 0.1 uF ceramic decoupling on each AVDD and DVDD pin within 5 mm of the package. Per the AKM manufacturer datasheet, ground VCOM (common-mode reference) with a 10 uF decoupling capacitor to keep DC bias stable at mid-supply.
The AK5394AVS is listed as Obsolete by AKM; for new designs use AK5398 (current generation). Do not assume AK5392/3 are guaranteed drop-in despite the semi-pin-compatible label - verify pinout table against this datasheet before PCB rework. Watch for counterfeit parts on secondary markets: confirm lot codes and date codes with AKM or authorized distributors when sourcing. As of 2026-10-06, broker inventory is the only supply channel and lead time is variable.
Use a low-jitter master clock - jitter above 100 ps directly degrades SNR for 192 kHz operation per typical ADC practice. Drive MCLK with a clean crystal oscillator or low-jitter PLL rather than a noisy FPGA clock buffer. Keep analog inputs (AOUTL+/-, AOUTR+/-) routed as differential pairs over a continuous ground plane to reject common-mode noise; input RC anti-alias filters should match the differential source impedance.
Compliance Information
Compliance status not stated in the verified AKM datasheet mirror (Micro-Semiconductor). Asahi Kasei Microdevices has not published a current RoHS/REACH declaration for this obsolete part in the retrieved sources. AEC-Q100 is not applicable - AK5394AVS is a precision audio ADC, not an automotive qualified part.
