AK7755EN - 18.6MHz Audio DSP | Asahi Kasei | Codec
料号： AK7755EN ✓ 量产中AK7755EN 概述
A digital signal processor, or DSP, is a programmable semiconductor that executes audio algorithms in real time. Unlike a fixed-function codec, a RAM-based DSP can support user-defined signal processing, including high-performance hands-free functions and acoustic effects. The AK7755EN places conversion, analog amplification, and programmable processing in one compact package for voice and audio systems.
The AK7755EN provides 24-bit floating-point processing, an 18.6 MHz operating clock, and 2560 processing steps at a 48 kHz sampling rate. Its integrated signal path includes one mono ADC, a stereo audio CODEC, a microphone pre-amplifier, a line-out amplifier, and a digital audio interface. This integration can reduce the number of external audio components required in a compact product.
The device combines mixed-signal conversion with a programmable digital processing core. Its RAM-based architecture allows system developers to implement application-specific processing instead of relying only on fixed hardware playback paths. The 36-QFN package supports compact surface-mount layouts while providing access to the device's analog, digital, power, and configuration functions.
Typical uses include hands-free communications, voice-processing terminals, acoustic-effect systems, and other audio products requiring programmable mono microphone input and stereo output. The combination of a mono ADC and stereo audio processing is particularly useful when a system needs to capture one voice channel while generating stereo playback or mixed audio.
Design layouts should use the manufacturer's pin-description table for every connection, place analog and digital return paths carefully, and provide the required input, output, and bypass capacitors. Because this is a programmable DSP, confirm the supported clocking, firmware, and digital-interface configuration before committing a PCB layout.
This page combines the AK7755EN's manufacturer feature description with practical integration guidance, application fit, sourcing information, and disciplined drop-in replacement criteria. It is intended to help engineers evaluate the device without confusing same-function converters with genuinely pin-compatible alternatives.
直接替换替代料： AK7755EN ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
该产品暂无直接替换替代料。
请求替代料AK7755EN 规格参数
| Product Type | RAM-based floating-point audio digital signal processor |
| 最大时钟频率 | 18.6 MHz |
| Processing Resolution | 24 bit |
| Parallel Processing Power | 2560 steps at 48 kHz |
| ADC Configuration | 1 mono ADC channel |
| Audio CODEC Configuration | 1 stereo audio CODEC |
| Integrated Amplifier Functions | 1 microphone pre-amplifier and 1 line-out amplifier |
| Digital Audio Interface | 1 integrated digital audio I/F |
| Programmable Architecture | RAM-based DSP |
| Package Type | 36-QFN |
| Package Dimensions | 6 x 6 mm |
| 引脚数量 | 36 pins |
| 安装类型 | Surface mount |
| Exposed Pad | Present in 36-QFN EP package |
| Analog Input Type | Mono microphone input |
| Analog Output Type | Stereo line output |
AK7755EN 6 x 6 mm 引脚配置指南
AK7755EN（6 x 6 mm 封装）的引脚配置。 引脚编号、功能和连接图在制造商数据手册中定义。请参阅该手册以了解确切的封装尺寸和焊接指南。
暂无详细引脚数据： AK7755EN.
请参阅 数据手册 以查看完整引脚配置。
典型应用
AK7755EN 适用于 6 应用s: Hands-Free Voice Terminal, Voice-Controlled Speaker, Hands-Free Conferencing System, Acoustic Effects Audio Module, Compact Audio Interface, Noise-Controlled Voice Product.
Hands-Free Voice Terminal
The AK7755EN fits hands-free voice terminals that require real-time microphone processing and programmable acoustic behavior. Its 18.6 MHz floating-point DSP executes 2560 steps at a 48 kHz sampling rate, while the integrated mono ADC provides the capture path and the microphone pre-amplifier reduces the need for separate analog gain stages. The RAM-based architecture allows user-defined voice functions and acoustic effects to be implemented in the same device. Compared with a fixed-function codec, it provides greater algorithmic flexibility, although firmware development and signal-chain validation are required.
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Voice-Controlled Speaker
The AK7755EN is suitable for voice-controlled speakers that capture a single microphone channel and produce stereo audio through an integrated signal path. Its mono ADC supports voice capture, while the stereo audio CODEC and line-out amplifier support dual-channel output processing at 18.6 MHz. The 24-bit floating-point DSP can run real-time level detection, noise reduction, acoustic enhancement, or other user-defined algorithms. Using one programmable package can simplify the analog topology, although clocking, gain staging, and channel routing must follow the manufacturer configuration guidance.
推荐
Hands-Free Conferencing System
The AK7755EN can support conferencing products that process a near-end microphone signal while generating stereo output. The mono ADC handles the near-end capture path, and the programmable DSP provides 2560 processing steps at a 48 kHz rate for voice enhancement, echo-related processing, or acoustic effects. Its integrated microphone pre-amplifier and line-out amplifier reduce discrete component count around the conversion stages. For production designs, engineers should validate microphone sensitivity, output headroom, algorithmic latency, and the interaction between analog filtering and digital processing.
推荐
Acoustic Effects Audio Module
The AK7755EN is appropriate for an audio module whose defining requirement is programmable acoustic processing rather than fixed conversion alone. Its RAM-based DSP can store and execute user-defined effects, while the integrated mono ADC, stereo codec, microphone pre-amplifier, and line-out amplifier create a compact processing chain. The 18.6 MHz clock and 24-bit floating-point arithmetic provide the stated processing foundation for effects operating at 48 kHz. Implementation effort will center on algorithm development, parameter control, memory use, and ensuring the analog stages remain stable while output loading changes.
推荐
Compact Audio Interface
The AK7755EN works well in a compact audio interface that combines microphone input, stereo conversion, programmable processing, and digital connectivity. Its 36-QFN package measures 6 x 6 mm, allowing the mixed-signal functions to be placed close to connector and signal-processing components. The integrated mono ADC, stereo CODEC, microphone pre-amplifier, line-out amplifier, and digital audio interface reduce the number of discrete conversion stages. Its practical benefit is integration rather than simply raw processing speed, but sensitive analog routing, exposed-pad layout, and digital-interface timing still require careful PCB implementation.
推荐
Noise-Controlled Voice Product
The AK7755EN can be used in voice products where digital algorithms must control microphone noise, level, or spectral behavior. A mono ADC captures the voice channel, and the 24-bit floating-point processor performs programmable filtering or enhancement at up to 2560 steps per 48 kHz sample period. The integrated microphone pre-amplifier provides a defined input stage, while the stereo codec and line-out amplifier provide the playback path. This arrangement supports adaptable behavior without a fixed-function codec, but developers must budget processor capacity, test algorithmic latency, and verify that analog noise does not obscure processing improvements.
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推荐产品汇总
工程参考数据： AK7755EN ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 |
|---|---|
| Brand | Asahi Kasei Microdevices |
| Package | 36-QFN (6 x 6 mm) |
| Product Type | RAM-based floating-point audio DSP |
| Clock Frequency | 18.6 MHz |
| Processing Resolution | 24 bit |
| Processing Capacity | 2560 steps at 48 kHz |
| ADC | Mono ADC |
| Audio CODEC | Stereo |
| Integrated Amplifiers | Microphone pre-amplifier and line-out amplifier |
| Digital Interface | Digital audio I/F |
| Programmability | RAM-based user-programmable processing |
| Mounting Type | Surface mount |
关键差异点
- Programmable audio processing （对比 Fixed-function stereo audio codec)
- Mixed-signal integration （对比 Discrete ADC and codec signal chain)
- Compact processing footprint （对比 Larger multi-chip codec implementation)
设计说明
Route the mono microphone input and stereo line outputs as sensitive analog signals, keeping them away from digital clocks and high-current switching nodes. Place the manufacturer-specified input, output, bypass, and digital-interface capacitors close to their associated pins. Maintain a continuous ground reference beneath the QFN and use the datasheet land pattern for the exposed pad to preserve both electrical and thermal performance.
Separate analog input, analog output, digital interface, and power-return paths before they converge at the device ground reference. The AK7755EN combines a mono ADC, stereo CODEC, microphone pre-amplifier, and line-out amplifier with an 18.6 MHz DSP, so unintended coupling can affect either conversion channel. Use a stable ground-plane strategy, minimize loop area around sensitive pins, and keep clock traces away from microphone and line-output traces.
Follow the manufacturer’s supply, decoupling, sequencing, and exposed-pad connection requirements exactly. The QFN exposed pad is part of the thermal and electrical design and must be connected according to the datasheet land pattern rather than left isolated. Confirm the device’s required operating voltage before designing the supply rail, and validate startup behavior across all intended microphone, digital-interface, and output configurations.
Do not treat a generic 36-QFN audio codec as a drop-in replacement. Compatibility requires matching not only the package outline but also the exposed pad, pin functions, analog signal levels, clocking, digital interface, processor architecture, and firmware model. A valid redesign also requires reassessment of external component values, software startup, interrupts, and control-register behavior.
合规信息
Compliance status must be confirmed for the exact ordering variant using the manufacturer’s current declaration or product documentation.
