AK4373EN - 24-Bit Stereo DAC with HP/SPK Amp | AKM
MPN： AK4373EN ✓ 啟用中AK4373EN 概覽
An audio DAC is a signal-conversion integrated circuit that transforms digital audio samples into analog voltage signals. The AK4373EN combines three functions in one device: a stereo DAC, a stereo headphone amplifier, and a monaural speaker driver. This integration reduces the number of external analog-output blocks in portable equipment and allows the output stages to be configured for different audio use cases.
The device provides 24-bit digital audio resolution with support for 48 kHz sampling and an I2S interface. These parameters are suitable for consumer audio playback paths where a compact digital interface and low-power implementation are priorities. The integrated headphone and speaker drivers allow the same converter platform to support headphones, a speaker, or other line-level audio destinations when the application circuit is configured accordingly.
AK4373EN also includes digital signal-processing functionality associated with the AK4373 family. The manufacturer describes configurable output-driver use cases, allowing portable equipment designers to select operating arrangements suited to different playback conditions. The digital interface and control registers support integration with a host processor or audio controller, while the integrated analog output stages reduce board area compared with separate DAC and amplifier implementations.
Typical uses include game consoles, dedicated headphone drivers, personal navigation devices, portable media players, and other portable-audio or media-player products. In these systems, the AK4373EN can provide a single audio conversion and output solution for a stereo headphone connection or a monaural speaker path. The 32-QFN 5 x 5 mm package is suitable for compact boards, although its exposed-pad construction requires careful PCB land-pattern and thermal design.
When designing around the AK4373EN, verify the manufacturer pin description table, supported digital interface modes, analog output configuration, power sequencing, and bypass requirements before laying out the PCB. Keep analog output routing short, place required bypass capacitors close to their associated pins, and follow the package land pattern and exposed-pad soldering recommendations. This page consolidates the device identity, manufacturer documentation, sourcing references, and application guidance for engineers evaluating the AK4373EN.
直接替換替代品，適用於 AK4373EN — 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。
AK4373VN
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
AK4373EN 最大額定值與電氣特性
| Product Type | Stereo audio DAC with integrated headphone amplifier and speaker driver |
| Digital Audio Resolution | 24 bit |
| 取樣率 | 48 kHz |
| Digital Audio Interface | I2S |
| Channel Configuration | Stereo DAC |
| Headphone Output | Integrated stereo headphone amplifier |
| Speaker Output | Integrated monaural speaker driver |
| Digital Signal Processing | DSP functionality |
| 封裝 | 32-QFN, 5 x 5 mm |
| 安裝類型 | Surface Mount |
| Power Class | Low-power audio device |
| Application Category | Portable audio and media player |
AK4373EN 32-qfn, 5 x 5 mm 腳位配置指南
AK4373EN（32-qfn, 5 x 5 mm 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： AK4373EN.
請參閱 資料表 以查看完整腳位配置。
典型應用
AK4373EN 適用於 6 應用s: Portable Media Player, Game Console Audio Output, Dedicated Headphone Driver, Personal Navigation Device, Bluetooth Audio Accessory, Monaural Speaker Audio Path.
Portable Media Player
The AK4373EN fits portable media players that need a compact digital-to-analog conversion and output stage. Its 24-bit stereo DAC, 48 kHz operation, and I2S interface provide a direct path from a host audio controller to the integrated headphone amplifier. The 32-QFN 5 x 5 mm package helps preserve board area in a small enclosure. The headphone output network and required bypass components should be copied from the manufacturer application circuit. For a monaural speaker, the integrated speaker driver can reduce the number of separate analog blocks, subject to the load and power requirements of the chosen speaker.
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Game Console Audio Output
The AK4373EN is suited to game-console and dedicated-audio products requiring a low-power stereo DAC with integrated headphone drive. Its I2S input supports connection to a digital audio host, while the 24-bit DAC and 48 kHz capability cover common consumer playback rates. The integrated stereo headphone amplifier can simplify the output path compared with a standalone DAC followed by a separate headphone amplifier. Board-level design work should account for the 32-QFN exposed pad, short analog traces, clean digital return paths, and the exact output configuration specified in the datasheet.
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Dedicated Headphone Driver
In a dedicated headphone-driver product, the AK4373EN combines a 24-bit stereo DAC and stereo headphone amplifier in one low-power package. This arrangement can reduce component count and shorten the analog path between the converter and headphone output stage. The device supports I2S digital audio and 48 kHz operation, allowing a host processor to deliver standard consumer audio data. Designers should verify the required headphone impedance, output level, channel mode, and bypass-network values against the manufacturer guidance before choosing passive components or setting analog gain.
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Personal Navigation Device
The AK4373EN can support audio playback in a personal navigation device where board area and power consumption are important. The manufacturer identifies personal navigation devices as an application for the low-power stereo DAC with integrated headphone amplifier and monaural speaker driver. A navigation processor can provide I2S audio to the converter, which can then drive the selected headphone or speaker load. The integration helps limit external analog-output component count. Layout must still separate sensitive analog routing from digital clocks and switching nodes, and the final speaker network must meet the device's specified load conditions.
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Bluetooth Audio Accessory
The AK4373EN is a practical output stage for a compact Bluetooth headphone or portable wireless-audio accessory. A Bluetooth audio SoC can deliver decoded digital audio over I2S, and the AK4373EN supplies the 24-bit DAC plus integrated stereo headphone amplification. At 48 kHz, it supports common high-resolution playback streams while keeping the analog output chain consolidated. Designers should use the manufacturer reference configuration for digital clocking, reset, power sequencing, filtering, and output bypass. Battery-powered products should also validate current draw across the operating mode changes used for playback and standby.
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Monaural Speaker Audio Path
The AK4373EN's integrated monaural speaker driver provides an option for compact products that need a local speaker output alongside a stereo headphone function. The device can convert I2S digital audio into analog signals and select the required output-driver arrangement for the application. This can simplify systems in which a compact speaker is used for navigation prompts, status messages, or local playback. The speaker impedance and acoustic target determine the usable output configuration, so those values must be checked before finalizing the output network, amplifier mode, and passive component values.
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工程參考資料，適用於 AK4373EN — 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 | AK4373VN | AK4373EN |
|---|---|---|---|
| Product Type | Stereo DAC with headphone amplifier and speaker driver | Stereo DAC with headphone amplifier and speaker driver | Stereo DAC with headphone amplifier and speaker driver |
| Brand | Asahi Kasei Microdevices/AKM | Asahi Kasei Microdevices/AKM | Asahi Kasei Microdevices/AKM |
| Package | 32-QFN, 5 x 5 mm | 32-QFN, 5 x 5 mm | 32-QFN, 5 x 5 mm |
| Digital Audio Resolution | 24 bit | 24 bit | 24 bit |
| Sampling Rate | 48 kHz | 48 kHz | 48 kHz |
| Digital Interface | I2S | I2S | I2S |
| Headphone Output | Integrated stereo headphone amplifier | Integrated stereo headphone amplifier | Integrated stereo headphone amplifier |
| Speaker Output | Integrated monaural speaker driver | Integrated monaural speaker driver | Integrated monaural speaker driver |
| Application Class | Portable audio and media player | Portable audio and media player | Portable audio and media player |
主要差異化特點
- Integrated three-function audio output path (對比Generic 24-bit stereo DAC)
- Compact package for portable audio (對比Discrete DAC plus amplifier implementation)
- Portable-focused application support (對比General-purpose standalone DAC)
設計說明
Follow the AK4373EN 32-QFN 5 x 5 mm land pattern exactly, including the exposed-pad geometry and thermal-via arrangement defined in the manufacturer package documentation. Place input, output, and bypass components close to their associated pins to minimize loop area. Keep headphone and speaker routing away from switching nodes and high-current return paths, and use a continuous ground reference beneath the device where the layout rules permit.
Decouple each supply rail with the capacitance and connection method specified in the AK4373EN application circuit. Confirm the regulator headroom for the intended digital, analog, and output-driver operating modes, and verify power-up and power-down sequencing before attaching external loads. The low-power nature of the device does not remove the need for stable supply rails during audio playback.
Treat the I2S clock, data, and latch signals as digital signals that require controlled return paths, while keeping the analog headphone and speaker outputs away from those nodes. Use short analog traces and place output-network components close to the relevant device pins. Confirm clock timing, bit alignment, mute behavior, and reset timing against the manufacturer timing diagrams before enabling the output drivers.
Do not assume that a generic 24-bit DAC is interchangeable with the AK4373EN. The integrated headphone amplifier, monaural speaker driver, register map, output configuration, clocking, and package connectivity are essential to the design. Validate the exact load, output mode, bypass values, exposed-pad solder process, and thermal performance in the final system before production.
合規資訊
The AK4373EN is an audio DAC rather than an automotive-qualified device; no specific RoHS, REACH, lead-free, halogen-free, or conflict-minerals statement was identified in the available manufacturer and distributor references.
