AK5357ET - 24-Bit Stereo Audio ADC, 96 kHz | AKM
N.º da peça: AK5357ET ✓ AtivoAK5357ET Visão geral
An audio ADC is a specialized data-acquisition IC that converts left- and right-channel analog audio voltages into sequential digital samples. Within the signal path, the ADC belongs to the broader ADC/DAC category and ultimately to the integrated-circuit and data-conversion families. Its sampling rate defines how many audio samples are captured each second, while the 24-bit conversion resolution establishes the numerical format of the resulting samples.
The AK5357ET operates with the audio clock signals MCLK, SCLK, and LRCK. The manufacturer datasheet states that all external clocks must be present unless the PDN pin is held low. If the external clocks are absent, placing the converter in power-down mode prevents its internally refreshed logic from drawing excess current. This clock-control requirement makes power sequencing an important part of the surrounding system design.
A typical implementation places the AK5357ET after the microphone preamplifier or line-level input stage. Analog inputs are sampled, converted by the dual-bit delta-sigma architecture, and transferred to a digital audio processor or audio codec through the serial interface. The 16-pin TSSOP package is suitable for compact consumer audio, communication, and multimedia equipment where board area is constrained.
When designing the PCB, treat MCLK, SCLK, and LRCK as sensitive digital timing signals and route them away from analog input traces. Establish analog and digital ground partitioning according to the layout guidance in the manufacturer datasheet, and place input and interface components close to their associated pins. The analog signal path should be kept short and away from high-current switching nodes.
This page consolidates the confirmed converter characteristics, interface requirements, application guidance, and a verified same-family replacement into a design-focused component reference for audio subsystem engineers.
Alternativas drop-in para AK5357ET — 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 AK5357ET (mesmo formato e footprint) — diferindo em Package.
AK5381ET
✅ Drop-InConsulte o preço
Ver ficha técnica →AK5357ET Classificações máximas e características elétricas
| Converter Type | Stereo audio analog-to-digital converter |
| Conversion Architecture | Enhanced dual-bit delta-sigma |
| Resolução | 24 bit |
| Maximum Sampling Rate | 96 kHz |
| Minimum Sampling Rate | 4 kHz |
| Sampling Rate Range | 4 kHz to 96 kHz |
| Digital Audio Interface | I2S |
| Number of Audio Channels | 2 channels |
| Encapsulamento | 16-pin TSSOP |
| Tipo de montagem | Surface mount |
| Power-Down Control | PDN pin |
| Required Clock Signals | MCLK, SCLK, and LRCK |
| Clock-Free Operating Condition | PDN held low |
| Application Segment | Multimedia audio systems |
Guia de Configuração de Pinos do AK5357ET 16-pin tssop
Configuração de pinos para AK5357ET (pacote 16-pin tssop). Este componente analógico possui pinos de entrada, saída e alimentação. Consulte o datasheet do fabricante para configurações de offset null, compensação e pino de enable. Ideal para circuitos de condicionamento de sinal e amplificadores.
Nenhum dado detalhado de pinagem disponível para AK5357ET.
Consulte a ficha técnica para a configuração completa dos pinos.
Aplicações típicas
AK5357ET é adequado para 6 aplicaçãos: Stereo Multimedia Audio Capture, USB Audio Interface, Voice and Communication Terminal, Digital Recording and Conferencing, Consumer Audio System, Audio Test and Measurement Front End.
Stereo Multimedia Audio Capture
The AK5357ET fits stereo multimedia capture because it digitizes two audio channels with 24-bit resolution and supports sampling rates from 4 kHz to 96 kHz. Place the converter after the microphone or line-input preamplifier and connect its I2S output to a digital audio processor. The dual-channel architecture avoids duplicating the converter for conventional left and right paths. Because MCLK, SCLK, and LRCK must be present in normal operation, the host processor should hold PDN low during reset or no-clock periods. This prevents excess current from the internally refreshed logic and makes the device practical for consumer audio products with strict standby-power limits.
Recomendado
USB Audio Interface
The AK5357ET is suitable for a USB audio interface when analog stereo must be converted before a USB controller processes the samples. Its 24-bit resolution and 96 kHz maximum sampling rate align with high-fidelity playback and recording paths, while the 4 kHz lower limit also supports voice-class capture. The I2S interface provides a conventional connection to an audio codec or digital signal processor. Designers should isolate the analog input traces from USB switching nodes, maintain the clock and data routing recommended in the manufacturer datasheet, and use PDN to remove the converter from the active power budget whenever the USB audio stream is stopped.
Recomendado
Voice and Communication Terminal
The AK5357ET can serve as the audio capture converter in a voice terminal or communication appliance because its sampling range begins at 4 kHz. A microphone preamplifier drives the converter, and the resulting digital samples are passed through I2S to a processor or communications codec. The device's 24-bit sample format leaves headroom for gain calibration and digital filtering in narrowband or wideband voice pipelines. Keep analog input routing short and keep the MCLK, SCLK, and LRCK routes away from microphone and switching-regulator nodes. Asserting PDN low when the audio path is inactive also helps control standby consumption in battery-powered terminals.
Recomendado
Digital Recording and Conferencing
The AK5357ET is appropriate for digital recording equipment that captures two channels at rates between 4 kHz and 96 kHz. Its 24-bit delta-sigma conversion provides a high-resolution sample stream for downstream editing, mixing, or speech processing, while I2S simplifies integration with audio engines and application processors. The converter should be positioned immediately after the analog preamplifier to minimize sensitive signal routing. Provide clean, short analog traces and separate the converter's clock and data routes from display, memory, and power-converter switching signals. The PDN feature allows the recording system to disable the converter during idle recording sessions.
Recomendado
Consumer Audio System
The AK5357ET fits consumer audio systems that require two-channel analog-to-digital conversion before digital volume, mixing, or effects processing. Its 24-bit resolution and 96 kHz upper sampling rate support conventional high-fidelity multimedia signals, while the 16-pin TSSOP package keeps the footprint compact. Connect the I2S output to an audio codec or processor and manage MCLK, SCLK, and LRCK as a coordinated clock group. When the product enters standby, hold PDN low so the converter avoids the excess current that can occur with absent external clocks. Validate analog headroom with the input amplifier because the converter does not replace the required gain stage.
Recomendado
Audio Test and Measurement Front End
The AK5357ET can serve as the stereo conversion front end in an audio test instrument or signal-monitoring product. The 4 kHz-to-96 kHz range permits different measurement bandwidths, and the 24-bit format supports analysis stages that need more numeric headroom than a simple control-audio converter. Route the analog inputs through a calibrated gain stage and keep high-impedance input traces short. The serial interface carries the measurement samples to a digital processing section, with MCLK, SCLK, and LRCK supplying the required timing. Powering down through PDN during inactive test cycles reduces standby demand and simplifies clock-management logic.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para AK5357ET — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | AK5381ET |
|---|---|---|
| Brand | Asahi Kasei Microdevices/AKM | Asahi Kasei Microdevices/AKM |
| Package | 16-pin TSSOP | 16-pin TSSOP |
| Converter Type | Stereo audio ADC | Dual-channel ADC |
Principais diferenciais
- Direct stereo conversion in one package (vs AK5381ET)
- Broad multimedia sampling range (vs AK5381ET)
- Clock-free power-down behavior (vs AK5381ET)
Notas de projeto
Assert PDN low whenever MCLK, SCLK, or LRCK is absent. The manufacturer datasheet warns that the AK5357ET may draw excess current when its internally refreshed logic operates without the expected external clocks. This is especially important in USB, portable, and codec architectures where the audio controller can stop the master clock before the converter is placed into standby. Verify the power-down state in both hardware reset and software mute paths.
Keep the analog input paths short, shielded where appropriate, and separated from digital clock, data, and switching-node routing. MCLK, SCLK, and LRCK should travel as a coordinated clock group, with data routed away from sensitive analog inputs. Follow the analog and digital grounding arrangement in the manufacturer datasheet rather than allowing return currents from the audio interface to pass beneath the converter.
Do not treat the AK5357ET as a microphone preamplifier; external analog gain and signal conditioning are still required to establish the correct input level. Also avoid operating the converter with a missing master, serial, or frame clock. Because PDN is part of the clock-management strategy rather than a substitute for valid clocking, use it when clocks are intentionally absent and keep the I2S interface timing aligned with the connected codec or processor.
Informações de conformidade
The manufacturer datasheet describes the converter and its clocking requirements. No explicit RoHS, REACH, halogen-free, or conflict-minerals declarations were identified for this part.