AK5701VN - 16-Bit Stereo ADC with PLL | Asahi Kasei
部品番号: AK5701VN ✗ 生産終了AK5701VN 概要
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.
ドロップイン代替品: AK5701VN — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
この製品に利用可能なドロップイン代替品はありません。
代替品をリクエストAK5701VN 最大定格＆電気的特性
| Converter Type | Stereo successive-approximation ADC |
| 分解能 | 16 bit |
| Number of Audio Channels | 2 channels |
| サンプリングレート | 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 |
| パッケージ | 24-pin QFN with exposed pad, 4 mm x 4 mm |
| Package Pin Count | 24 pins |
| 実装タイプ | Surface mount |
| Primary Application | Portable audio recording |
AK5701VN 24 pins ピン配置ガイド
AK5701VN (24 pins パッケージ) のピン配置。 このアナログコンポーネントは、入力、出力、および電源ピンを備えています。オフセットナル、補償、イネーブルピンの設定については、メーカーのデータシートを参照してください。信号調整やアンプ回路に最適です。
詳細なピン配置データはありません: AK5701VN.
詳細は データシート をご参照ください。
主な用途
AK5701VN の用途: 6 件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.
おすすめ
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.
おすすめ
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.
おすすめ
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.
おすすめ
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.
おすすめ
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.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: AK5701VN — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 |
|---|---|
| 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 |
主な差別化要因
- Combines analog microphone conditioning with stereo conversion （vs Generic 16-bit stereo ADC)
- Integrated PLL reduces host clock-circuit complexity （vs Stereo ADC without integrated PLL)
- Compact exposed-pad package supports dense portable assemblies （vs Larger through-hole or leaded audio converter)
設計ノート
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.
コンプライアンス情報
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.
