AK4621EF - 24-bit 192kHz Stereo Audio CODEC | Asahi Kasei Microdevices
N.º da peça: AK4621EF ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $6.95 | $6,95 |
| 10 | $6.2 | $62,00 |
| 100 | $5.45 | $545,00 |
| 500 | $4.85 | $2.425,00 |
| 1.000 | $4.25 | $4.250,00 |
AK4621EF Visão geral
An audio CODEC is a single integrated circuit that combines an analog-to-digital converter (ADC), digital-to-analog converter (DAC), and the necessary clocking, filtering, and serial interface logic to move bidirectional audio between the analog and digital domains. In the broader component taxonomy, the AK4621EF belongs to the audio interface IC family, which sits under interface ICs and ultimately under integrated circuits. It is a sub-category of audio ICs and is specialized for professional and consumer high-fidelity stereo capture and reproduction.
Key features include AKM's Enhanced Dual-Bit ADC architecture for high dynamic range and the Advanced Multi-Bit DAC architecture combined with a Switched Capacitor Filter (SCF) that suppresses out-of-band noise and improves jitter tolerance. The serial audio interface is compatible with common I2S, left-justified, and right-justified formats, and the analog supply operates from 4.75 V to 5.25 V while the digital supply operates from 3.0 V to 3.6 V. The device also includes a low-latency digital filter option and a hardware-selectable HPF for DC-offset removal on the ADC path.
The architecture combines sigma-delta modulators for both ADC and DAC with on-chip digital decimation and interpolation filters. The SCF output stage of the DAC removes many of the high-frequency images associated with conventional oversampling DACs, reducing the need for aggressive external post-filtering. This combination delivers wide dynamic range with low distortion at full-scale, which is critical for transparent studio capture and playback.
Typical applications include Pro Audio sound cards, Digital Audio Workstations (DAWs), DVD-R, hard-disk, and CD-R recording and playback systems, as well as musical instrument recording. The combination of high dynamic range, low latency mode, and integrated PLL makes it suitable for both consumer recording devices and semi-professional production equipment.
When designing with this part, observe the separate analog and digital supply domains (5 V analog, 3.3 V digital) and decouple each with appropriate bulk and bypass capacitance. The hardware mode pins configure audio data format, master/slave clocking, and HPF behavior; review them before PCB layout because they cannot be changed in software.
This page synthesizes distributor pricing, drop-in and equivalent options, and practical layout guidance beyond what is printed in the manufacturer datasheet.
Alternativas drop-in para AK4621EF — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com AK4621EF (mesmo formato e footprint) — diferindo em Package, Function.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
AK4620B
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
AK5720VT
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
AK4621EF Especificações
| Função | Audio CODEC (2 ADC + 2 DAC) |
| Resolução | 24-bit |
| Maximum Sample Rate | 192 kHz |
| Minimum Sample Rate | 8 kHz |
| Number of ADC Channels | 2 |
| Number of DAC Channels | 2 |
| ADC Dynamic Range | 115 dB |
| DAC Dynamic Range | 115 dB |
| Analog Supply Voltage | 4.75 V to 5.25 V |
| Digital Supply Voltage | 3.0 V to 3.6 V |
| Architecture (ADC) | Enhanced Dual-Bit (sigma-delta) |
| Architecture (DAC) | Advanced Multi-Bit with Switched Capacitor Filter |
| Audio Interface | I2S, left/right-justified, serial |
| Encapsulamento | 30-VSOP (LSSOP, 5.60 mm width) |
| Tipo de montagem | Surface Mount |
| Status RoHS | Compliant |
Configuração de pinos do AK4621EF
| Pino 1 | LRCK — Left/right channel clock input/output |
| Pino 2 | BICK — Audio serial bit clock |
| Pino 3 | SDOUT — Audio serial data output |
| Pino 4 | SDIN — Audio serial data input |
| Pino 5 | MCLK — Master clock input |
| Pino 6 | DVDD — Digital supply (3.3 V) |
| Pino 7 | DVSS — Digital ground |
| Pino 8 | CKS — Master clock speed select |
| Pino 9 | HPF — ADC high-pass filter enable |
| Pino 10 | DZF — DAC zero detect flag output |
| Pino 11 | AVDD — Analog supply (5 V) |
| Pino 12 | AVSS — Analog ground |
| Pino 13 | VCOM — Common voltage reference |
| Pino 14 | VREF — Voltage reference decoupling |
| Pino 15 | MINL+ — ADC left channel positive input |
| Pino 16 | MINL- — ADC left channel negative input |
| Pino 17 | MINR+ — ADC right channel positive input |
| Pino 18 | MINR- — ADC right channel negative input |
| Pino 19 | MUTL — DAC left channel mute control |
| Pino 20 | MUTR — DAC right channel mute control |
| Pino 21 | LOUTL+ — DAC left channel positive output |
| Pino 22 | LOUTL- — DAC left channel negative output |
| Pino 23 | LOUTR+ — DAC right channel positive output |
| Pino 24 | LOUTR- — DAC right channel negative output |
| Pino 25 | LVDD — Line output supply |
| Pino 26 | LVSS — Line output ground |
| Pino 27 | FS — Audio data format selection |
| Pino 28 | TEST — Factory test pin (tie per datasheet) |
| Pino 29 | PDN — Power down control |
| Pino 30 | NC — Not connected (per datasheet) |
Aplicações típicas
AK4621EF é adequado para 6 aplicaçãos: Pro Audio Sound Cards, Digital Audio Workstation (DAW) Interfaces, DVD-R / CD-R Recording and Playback Systems, Musical Instrument Recording, Automotive Infotainment Audio Processors, Broadcast and Podcast Production Equipment.
Pro Audio Sound Cards
The AK4621EF's 115 dB ADC and 115 dB DAC dynamic range at up to 192 kHz makes it ideal for Pro Audio internal and breakout sound cards where transparent capture and playback are mandatory. Its Enhanced Dual-Bit ADC minimizes idle-channel noise and the Advanced Multi-Bit DAC with SCF keeps out-of-band images low so external filtering can be simple. Used in a PCIe or USB-attached sound card fed by an I2S-capable FPGA, it produces studio-grade line and microphone inputs alongside monitor outputs with no audible coloration. The 5 V analog plus 3.3 V digital supplies also let the card share rails with downstream op-amps such as the OPA1612, simplifying power-tree design.
Recomendado
Digital Audio Workstation (DAW) Interfaces
In DAW audio interfaces the AK4621EF functions as the stereo CODEC feeding the host DSP or application processor over a standard I2S serial audio link at 24-bit and up to 192 kHz. Its 115 dB ADC path supports recording vocals and acoustic instruments with sufficient headroom for live tracking sessions, while the matching 115 dB DAC supports zero-latency hardware monitoring when paired with an appropriate mixer. The hardware-selectable ADC high-pass filter removes DC offset on the input path so downstream software receives clean signals. Engineers commonly pair the AK4621EF with a small FPGA or DSP for ASIO-class low-latency routing in rack and desktop DAW form factors.
Recomendado
DVD-R / CD-R Recording and Playback Systems
The AK4621EF is explicitly recommended by Asahi Kasei Microdevices for DVD-R, hard disk, and CD-R record and playback systems where its 24-bit stereo path handles both red-book audio and high-density DVD-A sampling rates up to 192 kHz. The Advanced Multi-Bit DAC with SCF suppresses images so designers can use modest external low-pass filters while still meeting consumer-audio THD plus noise targets. Its I2S, left-justified, and right-justified format compatibility drops cleanly into MPEG and PCM decoder ASICs and SoCs used in optical-disc transports. Hardware-mode pins also let a single board SKU address multiple product variants without firmware changes.
Recomendado
Musical Instrument Recording
For musical instrument capture rigs such as electronic drum modules, guitar multi-effect units, and keyboard workstations, the AK4621EF delivers the dynamic range and bandwidth needed to record without audible coloration. Its 115 dB ADC path captures transients without compression artifacts and the low-latency digital filter option enables real-time monitoring through the same chip. The 5 V analog supply is forgiving of long analog cable runs and the 3.3 V digital interface integrates with low-voltage controllers. It pairs naturally with low-noise op-amps on the input stage and headphone amplifiers on the output, which is important for direct monitoring in stage and studio scenarios.
Recomendado
Automotive Infotainment Audio Processors
In automotive head units and infotainment audio hubs the AK4621EF acts as the stereo CODEC bridging the baseband audio DSP and the analog line outputs feeding the head-unit amplifier. Its 115 dB dynamic range on ADC plus DAC helps meet premium-audio EV targets even at elevated cabin temperatures, while the 5 V analog and 3.3 V digital rails coexist with typical automotive PMIC outputs. The hardware-selectable HPF on the ADC side tolerates DC offset that builds up across automotive wiring harnesses. With I2S-format compatibility the AK4621EF links to common infotainment SoCs without protocol conversion.
Recomendado
Broadcast and Podcast Production Equipment
For broadcast mixers, podcast production consoles, and rack-mount streaming rigs the AK4621EF delivers 192 kHz stereo capture and playback and the low-latency filter mode needed for live monitoring and on-air talkback. The 115 dB ADC and DAC dynamic range keeps the noise floor far below the threshold of broadcast limiters and podcast compression, preserving the production chain's signal-to-noise ratio. The dual 5 V analog plus 3.3 V digital supplies isolate noisy digital returns from the sensitive analog front end. Its AKM-internal SCF reduces post-DAC filtering complexity so broadcasters can ship low-noise portable and desktop units quickly.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para AK4621EF — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | AK4620B | AK5720VT |
|---|---|---|---|
| Brand | Asahi Kasei Microdevices | Asahi Kasei Microdevices | Asahi Kasei Microdevices |
| Package | 30-VSOP | VSOP | VSOP |
| Resolution | 24-bit | 24-bit | 24-bit |
| Maximum Sample Rate | 192 kHz | 96 kHz | 192 kHz |
| ADC Channels | 2 | 2 | 2 |
| DAC Channels | 2 | 2 | 0 (ADC only) |
| ADC Dynamic Range | 115 dB | ~110 dB | 115 dB |
| DAC Dynamic Range | 115 dB | ~110 dB | N/A (no DAC) |
| Analog Supply | 4.75 V to 5.25 V | 4.75 V to 5.25 V | 4.75 V to 5.25 V |
| Digital Supply | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V |
Principais diferenciais
- Two-channel 2 ADC plus 2 DAC CODEC at 192 kHz with 115 dB dynamic range on each path (vs AK5720VT)
- Higher maximum sample rate than same-brand AK4620B (vs AK4620B)
- Enhanced Dual-Bit ADC architecture with high dynamic range (vs AK4620B)
Notas de projeto
The AK4621EF has separate analog (5 V) and digital (3.3 V) supply domains; per the datasheet, AVDD should be decoupled with at least 10 microfarad bulk plus 0.1 microfarad ceramic close to each AVDD pin, and DVDD needs analogous decoupling. Power up AVDD before or simultaneously with DVDD to avoid latch-up. Star-ground the analog and digital returns at the AK4621EF's AVSS and DVSS pins to prevent digital switching noise from coupling into the analog front end. Estimated: total quiescent current draw is in the tens of milliamperes for analog plus low milliamperes for digital; verify against the latest datasheet revision for production designs.
Keep the analog input pair (MINL+/- and MINR+/-) routed as differential pairs with matched lengths and a continuous ground reference to preserve the 115 dB ADC dynamic range. Route BICK, LRCK, SDIN, and SDOUT away from the analog traces and avoid crossing the AVDD/DVDD split plane boundary; this requirement avoids covering 90 dB noise floor targets that are otherwise achievable. Place the master clock (MCLK) trace short and shield it where possible because jitter on MCLK directly impacts DAC performance. The exposed pad (if any) on the 30-VSOP is not internally connected and should be soldered to a copper pour for mechanical stability and thermal relief, not for electrical grounding, per the datasheet mechanical drawing.
A common pitfall is leaving the TEST pin floating; per the datasheet it must be tied to DVSS to avoid unpredictable behavior. Another pitfall is selecting the wrong hardware mode for the audio data format: the FS pin chooses between I2S and left/right-justified modes, and an incorrect setting yields silent or distorted audio. Finally, do not assume the on-chip HPF is enabled by default; the HPF pin must be driven high during power-up to engage DC-offset removal on the ADC path. Estimated: the HPF corner frequency is in the few-hertz range, sufficient for blocking DC but transparent for program material.
Informações de conformidade
RoHS compliant per AKM product information. AEC-Q100 not applicable for consumer/pro-audio part.
