AK5701VN - 16-Bit Stereo ADC with PLL | Asahi Kasei
MPN： AK5701VN ✗ 停產AK5701VN 概覽
An ADC is an analog-to-digital converter, a data-conversion IC that transforms continuous analog audio voltages into discrete digital samples. The stereo ADC category includes devices that capture left and right audio channels, while a PLL, or phase-locked loop, generates a clock aligned to the digital audio interface. Together, these blocks place microphone conditioning and audio conversion within one compact mixed-signal IC.
The AK5701VN combines a 16-bit stereo conversion path, an integrated microphone amplifier, automatic level control, and a PLL. Its 24-pin QFN package reduces board area compared with larger multi-purpose audio converters. The I2S interface is suited to digital signal processors and application processors, while the stated 7.35 kHz to 48 kHz sampling range supports voice capture, portable recording, and conventional compact audio systems.
Technically, the integrated PLL reduces the need for a separate clock-generation component when the host DSP expects a derived base-band clock. The microphone amplifier provides analog gain before conversion, and automatic level control adjusts signal level to reduce the likelihood of clipping or an excessively weak recording. These functions are especially useful in designs where the analog microphone source varies substantially in level.
Typical applications include mobile-phone microphone capture, portable voice recorders, compact stereo audio products, and DSP-connected communication equipment. The IC can also support consumer audio modules where one device must combine microphone conditioning, clock generation, and stereo conversion without using a larger codec footprint.
The main design consideration is confirming that the host interface and clock arrangement match the AK5701VN requirements. The exposed pad requires an appropriate thermal and electrical land pattern, while microphone input routing, grounding, and decoupling must follow the manufacturer application guidance. Confirm package dimensions and pin assignments against the current manufacturer datasheet before releasing a PCB layout.
This product record consolidates the available manufacturer documentation, distributor specifications, interface details, application guidance, and verified source links. It also distinguishes documented functions from parameters that still require board-specific design confirmation, helping engineers evaluate the AK5701VN before starting a compact audio-capture design.
直接替換替代品，適用於 AK5701VN — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此產品無可直接替換的替代品。
申請替代品AK5701VN 最大額定值與電氣特性
| Converter Type | Stereo successive-approximation ADC |
| 解析度 | 16 bit |
| Number of Audio Channels | 2 channels |
| 取樣率 | 7.35 kHz to 48 kHz |
| Digital Audio Interface | I2S |
| Integrated PLL | Yes |
| Integrated Microphone Amplifier | Yes |
| Automatic Level Control | Yes |
| Analog Supply Voltage | 2.4 V to 3.6 V |
| Digital Interface Supply Voltage | 1.6 V to 3.6 V |
| 封裝 | 24-pin QFN with exposed pad, 4 mm x 4 mm |
| Package Pin Count | 24 pins |
| 安裝類型 | Surface mount |
| Primary Application | Portable audio recording |
AK5701VN 24 pins 腳位配置指南
AK5701VN（24 pins 封裝）的腳位配置。 此類比元件具有輸入、輸出與電源腳位。偏移歸零、補償與致能腳位配置請參閱製造商資料表。適用於訊號調理與放大器電路。
無詳細腳位定義資料： AK5701VN.
請參閱 資料表 以查看完整腳位配置。
典型應用
AK5701VN 適用於 6 應用s: Mobile Phone Voice Capture, Portable Voice Recorder, DSP-Connected Communication Module, Compact Stereo Audio Capture, USB Audio Capture Adapter, IoT Voice Sensor Interface.
Mobile Phone Voice Capture
The AK5701VN fits mobile-phone voice capture because it combines a 16-bit stereo ADC, integrated microphone amplifier, automatic level control, PLL, and I2S interface in one 24-pin QFN package. The 7.35 kHz sampling capability supports narrowband speech acquisition, while the PLL provides a base-band-clock option for DSP-connected designs. Using one device for microphone conditioning and conversion reduces the number of separate analog and clocking blocks. Designers should still verify the host clock ratio, I2S timing, input biasing, and acoustic-noise performance in the target enclosure.
推薦
Portable Voice Recorder
The AK5701VN is appropriate for a portable voice recorder requiring compact microphone capture without a large discrete preamplifier section. Its integrated microphone amplifier and automatic level control address variable speech levels, while the 16-bit stereo ADC preserves more amplitude detail than an 8-bit recorder. The I2S output allows samples to be transferred to a microcontroller or dedicated DSP for storage and encoding. At the 7.35 kHz lower sampling rate, the device is suited to voice-band recording rather than high-fidelity music capture.
推薦
DSP-Connected Communication Module
The AK5701VN fits communication modules in which a DSP performs voice processing after analog capture. The integrated PLL supports base-band-clock arrangements for DSP-connected equipment, avoiding a separate clock generator in designs where the host expects a derived clock. The I2S interface carries 16-bit stereo samples at up to 48 kHz, while the microphone amplifier and ALC reduce the amount of analog conditioning required. Board-level validation should compare clock jitter, I2S setup and hold timing, microphone sensitivity, and channel-to-channel behavior.
推薦
Compact Stereo Audio Capture
The AK5701VN can support compact stereo capture products that need more than a basic mono voice ADC but do not require a full multimedia codec. Its 16-bit stereo conversion and 7.35 kHz-to-48 kHz range cover voice, communications, and selected general-audio uses, while the 4 mm by 4 mm QFN package conserves board area. The integrated microphone amplifier and automatic level control simplify dual-channel input conditioning. Applications above 48 kHz or requiring playback, speaker amplification, or codec-level routing should use a more comprehensive audio-conversion device.
推薦
USB Audio Capture Adapter
The AK5701VN can serve as the analog-to-digital front end in a compact USB audio capture adapter when the host controller accepts I2S audio. Its microphone amplifier and automatic level control are useful for portable microphones with inconsistent output levels, and the PLL can support clocking arrangements expected by the downstream processor. The converter does not implement USB directly, so a USB-capable controller or bridge must handle enumeration, clock recovery, and data transport. Validate the complete clock tree and audio timing before selecting this architecture.
推薦
IoT Voice Sensor Interface
The AK5701VN is suitable for an IoT voice sensor that captures environmental speech through a microphone and processes the samples in an embedded controller. The integrated microphone amplifier, ALC, and PLL allow a compact sensor node to avoid separate analog gain and clock blocks. I2S transfers 16-bit stereo samples at voice-appropriate rates, including 7.35 kHz, while the small QFN package supports dense portable assemblies. A practical design must include close decoupling, a defined ground return, microphone biasing, and suitable acoustic isolation from fan or switching noise.
推薦
推薦產品摘要
工程參考資料，適用於 AK5701VN — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 |
|---|---|
| Package | 24-QFN-EP (4 mm x 4 mm) |
| Brand | Asahi Kasei Microdevices |
| Converter Type | 16-bit stereo ADC |
| Sampling Rate | 7.35 kHz to 48 kHz |
| Digital Audio Interface | I2S |
| Integrated PLL | Yes |
| Integrated Microphone Amplifier | Yes |
| Automatic Level Control | Yes |
| Analog Supply Voltage | 2.4 V to 3.6 V |
| Digital Interface Supply Voltage | 1.6 V to 3.6 V |
主要差異化特點
- Combines analog microphone conditioning with stereo conversion (對比Generic 16-bit stereo ADC)
- Integrated PLL reduces host clock-circuit complexity (對比Stereo ADC without integrated PLL)
- Compact exposed-pad package supports dense portable assemblies (對比Larger through-hole or leaded audio converter)
設計說明
Place the AK5701VN input, digital-interface, and supply decoupling capacitors directly beside their associated pins, following the manufacturer application circuit and land pattern. Keep the exposed-pad connection unobstructed and use the recommended thermal-via arrangement. Route I2S clock and data as a compact, length-matched group to reduce timing skew and susceptibility to switching noise around the analog microphone path.
Separate microphone input traces from I2S clock, data, and switching-supply paths. Use a quiet ground reference for the analog input and avoid routing the microphone signal beneath the exposed pad, clock lines, or digital return currents. Validate channel separation, noise floor, and ALC behavior with the final microphone, housing, and PCB because the external source impedance can materially affect the recorded signal.
Do not assume that a family suffix or a similar package proves drop-in compatibility. Confirm every pin, supply rail, I2S timing parameter, PLL configuration, microphone input range, and exposed-pad connection against the manufacturer datasheet. Also confirm that the selected sampling rate is acceptable for the intended voice or audio bandwidth; the 48 kHz maximum does not make the converter suitable for every ultrasonic or high-bandwidth application.
合規資訊
The AK5701VN is an audio converter and is not an automotive-qualified AEC-Q100 device. No explicit RoHS, REACH, lead-free, halogen-free, or conflict-minerals declaration was established for this exact orderable MPN.
