AK5357VT - 24-Bit Stereo Audio ADC | Asahi Kasei
MPN: AK5357VT ✗ End of LifeAK5357VT Overview
An audio ADC is an interface integrated circuit that converts left and right analog audio signals into digital samples. It belongs to the data-converter hierarchy, which includes ADCs and DACs, and operates as part of a broader audio signal-chain semiconductor. Audio ADCs are commonly positioned between microphones, line inputs, and digital audio processors.
The AK5357VT supports sampling rates from 4 kHz through 96 kHz, making it suitable for voice capture, multimedia equipment, and stereo digital-audio systems. Its 24-bit resolution provides 16,777,216 discrete codes per sample. Digital audio data is transferred through an I2S interface, while the converter operates from a 2.7 V to 5.5 V supply range.
Enhanced dual-bit delta-sigma conversion is the core signal-processing technique used by the AK5357. Delta-sigma architecture shapes quantization noise into a higher-frequency band, where digital filtering can reduce its effect on the audio passband. This approach is particularly useful when high resolution and compact implementation are more important than the very low noise associated with a conventional linear converter.
Typical uses include stereo multimedia audio inputs, digital-recording equipment, consumer audio interfaces, and systems that accept analog line-level signals for conversion to I2S data. The broad sampling-rate range also allows one converter design to cover multiple audio standards, from low-rate speech processing through high-rate multimedia playback and capture.
System integration requires correct clocking because MCLK, SCLK, and LRCK must be present during active operation. If those external clocks are absent, the PDN pin should be driven low to place the AK5357VT in power-down mode. This prevents excess current caused by internal dynamically refreshed logic operating without required clock signals.
This product page consolidates the core electrical characteristics, clocking requirements, package information, drop-in candidates, and practical integration notes for engineers evaluating the AK5357VT. Use the AK5357 English datasheet for the authoritative pin-description table, application circuit, electrical characteristics, and ordering information.
Drop-in alternatives for AK5357VT — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
AK5358AET
✅ Drop-In📋 Reference alternative (not in catalog)
AK5358ET-E2
✅ Drop-In📋 Reference alternative (not in catalog)
AK5357ET
✅ Drop-InContact for price
View Datasheet →AK5357VT Maximum Ratings & Electrical Characteristics
| Device Type | Stereo audio analog-to-digital converter |
| Converter Architecture | Enhanced dual-bit delta-sigma |
| Bit Resolution | 24 bit |
| Sampling Rate Range | 4 kHz to 96 kHz |
| Minimum Sampling Rate | 4 kHz |
| Maximum Sampling Rate | 96 kHz |
| Digital Audio Interface | I2S |
| Number of Audio Channels | 2 channels |
| Supply Voltage Range | 2.7 V to 5.5 V |
| Package Type | 16-pin TSSOP |
| Package Width | 4.40 mm |
| Package Body Length | 0.173 inch (4.40 mm) |
| Terminal Count | 16 terminals |
| Terminal Form | Gull wing |
| Package Shape | Rectangular |
| Mounting Style | Surface mount |
| Temperature Grade | Industrial |
| External Clock Signals | MCLK, SCLK, and LRCK |
| Power-Down Control | PDN pin |
| Datasheet Length | 20 pages |
AK5357VT rectangular Pin Configuration Guide
Pin configuration for AK5357VT (rectangular 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 AK5357VT.
Refer to the datasheet for full pin configuration.
Typical Applications
AK5357VT is suitable for 6 applications: Multimedia Audio Capture, Voice Recording System, Consumer Audio Line Input, Digital Recording Equipment, Digital Speaker and Amplifier Interface, Embedded Audio Acquisition Module.
Multimedia Audio Capture
The AK5357VT fits stereo multimedia capture because it converts two analog audio channels into 24-bit digital samples at rates from 4 kHz to 96 kHz. Its I2S output can connect directly to an audio processor when clock polarity, word alignment, and timing match the host. According to the AK5357 English datasheet, the converter uses enhanced dual-bit delta-sigma techniques, supporting high digital resolution in a compact 16-pin TSSOP. Keep MCLK, SCLK, and LRCK stable, and assert PDN whenever the system cannot provide those external clocks.
Recommended
Voice Recording System
The AK5357VT can serve as the stereo ADC in a voice-recording system that operates within its 4 kHz to 96 kHz sampling range. The 24-bit conversion format retains substantially more numerical headroom than a conventional 16-bit interface, allowing downstream gain control without immediate quantization loss. According to the AK5357 English datasheet, MCLK, SCLK, and LRCK must be present in active operation. Use PDN during startup and clock-loss conditions to avoid excess current from internal dynamically refreshed logic.
Recommended
Consumer Audio Line Input
For a consumer stereo line-input module, the AK5357VT provides a direct path from analog playback signals to an I2S digital bus. Its 2.7 V to 5.5 V operating range accommodates both low-voltage and 5 V system architectures, while the 16-pin TSSOP supports compact board placement. According to the AK5357 English datasheet, the converter can sample at up to 96 kHz, making it suitable for high-rate multimedia sources. Front-end attenuation, coupling, and anti-alias filtering should be selected for the source level and target bandwidth.
Recommended
Digital Recording Equipment
The AK5357VT is suitable for digital-recording front ends requiring two synchronized analog channels and 24-bit I2S output. Its sampling-rate range supports multiple operating modes within one design, from 4 kHz speech capture to 96 kHz multimedia recording. According to the AK5357 English datasheet, the external master, serial, and frame-rate clocks must remain present during normal operation. Design the clock tree and PDN control so the converter cannot begin active operation before its timing references are stable.
Recommended
Digital Speaker and Amplifier Interface
A digital speaker or amplifier input stage can use the AK5357VT to convert an analog source into the I2S stream expected by a downstream audio processor. The 24-bit converter and 96 kHz maximum sampling rate support detailed source material, while the two-channel architecture accommodates stereo signals. According to the AK5357 English datasheet, external clock continuity is essential during active conversion. Apply PDN when the upstream source or clocking subsystem is unavailable so excess current is not caused by missing timing signals.
Recommended
Embedded Audio Acquisition Module
The AK5357VT can provide a compact stereo acquisition endpoint in an embedded multimedia module. Its 24-bit resolution supports downstream filtering and level control, while the 4 kHz to 96 kHz range accommodates speech, music, and general-purpose audio capture. According to the AK5357 English datasheet, the converter operates from 2.7 V to 5.5 V and uses MCLK, SCLK, and LRCK for external timing. In a modular design, route PDN from the host so the ADC remains powered down whenever the module lacks stable clocks.
Recommended
Recommended Products Summary
Engineering reference data for AK5357VT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | AK5358AET | AK5358ET-E2 | AK5357ET |
|---|---|---|---|---|
| Package | 16-TSSOP | 16-TSSOP | 16-TSSOP | 16-TSSOP |
| Brand | Asahi Kasei Microdevices | Asahi Kasei Microdevices | Asahi Kasei Microdevices | Asahi Kasei Microdevices |
| Converter Type | Stereo delta-sigma ADC | Stereo delta-sigma ADC | Stereo delta-sigma ADC | Stereo delta-sigma ADC |
| Bit Resolution | 24 bit | 24 bit | 24 bit | 24 bit |
| Audio Channels | 2 channels | 2 channels | 2 channels | 2 channels |
Key Differentiators
- Broad multimedia sampling range in a compact stereo converter (vs AK5357ET)
- Directly documented 24-bit stereo conversion class (vs AK5358AET)
- Single-manufacturer sourcing family (vs AK5358ET-E2)
Design Notes
Hold PDN low whenever MCLK, SCLK, or LRCK is absent. According to the AK5357 English datasheet, missing external clocks can cause excess current because internal dynamically refreshed logic continues operating. Coordinate the host reset sequence so all three clocks become stable before PDN is released, and keep PDN asserted during shutdown to avoid an uncontrolled converter state.
Route MCLK, SCLK, and LRCK as short, continuous clock nets and place the associated bypass capacitor close to the device power pin. Maintain a quiet return path for the analog input and digital interface sections, with their ground references joined according to the manufacturer application circuit. PCB trace geometry should avoid running audio clocks beneath the analog input network to reduce potential coupling into the converted signal.
Do not substitute an AK5357 ordering code solely because it has the same 16-pin TSSOP outline. Confirm the numbered pin assignments, supply limits, clock behavior, interface mode, temperature grade, and lifecycle status in the manufacturer datasheet. The available comparison pages identify AK5358AET, AK5358ET-E2, and AK5357ET as related candidates, but they do not replace a complete engineering review of timing and electrical characteristics.
Compliance Information
The product is listed as an industrial-temperature-grade 16-TSSOP audio ADC. Specific RoHS, REACH, lead-free, halogen-free, and conflict-minerals statements require confirmation from the manufacturer product documentation.