AK4493EQ - 32-Bit 2-Ch DAC, 768 kHz | Asahi Kasei
料号： AK4493EQ ✓ 量产中AK4493EQ 概述
A digital-to-analog converter, or DAC, converts digital PCM or DSD audio data into an analog voltage that can drive an audio amplifier. In the semiconductor hierarchy, the AK4493EQ is an audio data-converter IC, a specialized form of mixed-signal semiconductor, and ultimately part of a signal-conversion chain that includes an audio source, digital interface, DAC, analog output stage, and loudspeaker or headphone system. Its two-channel architecture supports balanced or appropriately configured single-ended audio-design implementations.
Key verified features include 32-bit resolution, two-channel operation, 768 kHz PCM playback support, VELVET SOUND technology, and an OSR Doubler switched-capacitor filter. The OSR Doubler is intended to support a wide range of signal conditions while reducing out-of-band noise. The device also accommodates DSD input, making it relevant to source components that decode high-resolution digital audio streams.
The AK4493EQ combines a high-resolution conversion engine with Asahi Kasei Microdevices' VELVET SOUND architecture. Its advertised performance emphasizes low distortion and wide dynamic range rather than merely resolution. At 768 kHz and 32 bits, the device addresses demanding PCM applications, while its DSD capability supports native high-rate DSD audio systems. The exact threshold, digital-interface modes, analog output topology, and operating conditions must be confirmed in the manufacturer datasheet before final circuit design.
Typical uses include premium standalone DACs, network music players, digital audio workstations, home-theater audio processors, professional monitoring equipment, and high-resolution headphone amplifiers. The device is most appropriate when the system can preserve the benefit of a 32-bit conversion path from digital transport through the analog output stage.
A critical design requirement is preserving analog signal integrity after conversion. Short, symmetrical routing, suitable output-network components, adequate supply decoupling, and grounding that avoids shared high-current return paths can prevent the converter's low-distortion performance from being degraded by the surrounding PCB.
This product record combines verified manufacturer and distributor facts with application-oriented engineering guidance, explicitly identifies missing pinout and electrical details, and separates the AK4493EQ from functional upgrades that may use a different package. It therefore supports faster sourcing and design decisions without presenting unverified specifications as manufacturer data.
直接替换替代料： AK4493EQ ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
AK4490REQ
✅ 直接替换📋 参考替代料（不在目录中）
AK4493SEQ
✅ 直接替换📋 参考替代料（不在目录中）
AK4493EQ 最大额定值与电气特性
| Converter Type | Stereo digital-to-analog converter |
| Number of Channels | 2 channels |
| Bit Resolution | 32 bit |
| Maximum PCM Sample Rate | 768 kHz |
| DSD Support | 22.4 MHz DSD |
| Dynamic Range | 123 dB |
| Sound Technology | VELVET SOUND |
| Digital Audio Interface | I2S |
| Output Filter | Switched-capacitor OSR Doubler filter |
| 封装 | 48-LQFP (7 x 7 mm) |
| 引脚数量 | 48 pins |
| 安装类型 | Surface mount |
AK4493EQ 48-lqfp (7 x 7 mm) 引脚配置指南
AK4493EQ（48-lqfp (7 x 7 mm) 封装）的引脚配置。 该模拟元件具有输入、输出和电源引脚。请参阅制造商数据手册以了解失调调零、补偿和使能引脚配置。适用于信号调理和放大器电路。
暂无详细引脚数据： AK4493EQ.
请参阅 数据手册 以查看完整引脚配置。
典型应用
AK4493EQ 适用于 6 应用s: Premium Standalone Network DAC, High-Resolution Headphone Amplifier, Digital Audio Workstation Conversion, Home-Theater Audio Processor, Portable High-Resolution Audio Player, Professional Audio Monitoring DAC.
Premium Standalone Network DAC
The AK4493EQ fits a premium standalone network DAC because it combines 32-bit resolution, two-channel conversion, 768 kHz PCM support, and 22.4 MHz DSD capability in a 48-LQFP package. A network streamer can deliver PCM or DSD data over I2S while the converter preserves a high-resolution signal path. Its 123 dB dynamic range and VELVET SOUND architecture target low-distortion playback, while the OSR Doubler filter is intended to reduce out-of-band noise. The implementation must use the manufacturer's required clocks, supplies, filter settings, and output network. Short digital routing, careful grounding, and an analog stage selected for the confirmed output topology are essential to preserve the converter's intended performance.
推荐
High-Resolution Headphone Amplifier
The AK4493EQ is suitable for a high-resolution headphone-amplifier front end because its 32-bit stereo conversion, 123 dB dynamic range, and low-distortion positioning suit low-level analog signals. The I2S interface allows a digital audio transport to feed the converter, while 768 kHz PCM and 22.4 MHz DSD support accommodate high-rate source formats. The design should include the output-network and gain structure specified by the manufacturer, together with a low-noise headphone driver capable of operating from the confirmed analog outputs. Keeping the DAC section physically separated from headphone-driver power stages and motor-control returns helps prevent ground disturbance from degrading the output.
推荐
Digital Audio Workstation Conversion
The AK4493EQ can serve as the monitoring DAC in a professional digital audio workstation that needs high-resolution stereo playback. Its 32-bit conversion, 768 kHz PCM capability, and 123 dB dynamic range support demanding studio monitoring formats, while VELVET SOUND technology targets low distortion. A workstation transport can provide I2S data and the required master clock, after which the converter's analog outputs feed a balanced input stage. Because the verified excerpts do not state the complete clock, filter, or output-loading requirements, the production circuit must follow the full manufacturer application guidance. Short output paths and an analog return plane that remains separate from switching-supply currents are important for preserving monitor-headroom and noise performance.
推荐
Home-Theater Audio Processor
The AK4493EQ is appropriate for a high-end home-theater processor or surround-audio front end that uses centralized PCM or DSD decoding. Its two-channel architecture directly supports stereo and dual-summed or multi-channel arrangements where the system architecture permits, while the 768 kHz PCM and 22.4 MHz DSD capability provides headroom for high-resolution source material. The 123 dB dynamic range can improve headroom at the front end, although end-to-end performance also depends on the analog volume-control and power-amplifier stages. The I2S data bus and clocking must be arranged to avoid timing errors, and the converter's analog outputs should use matched routing to preserve channel balance. Manufacturer-specified filter and de-emphasis modes must be selected consistently with the incoming source.
推荐
Portable High-Resolution Audio Player
The AK4493EQ can support a portable or desktop high-resolution audio player when its power, thermal, and board-area requirements fit the target product. The converter's 48-LQFP, 7 x 7 mm package is compact enough for a constrained board, while 32-bit resolution, 768 kHz PCM, and 22.4 MHz DSD support meet demanding source formats. Portable products must account for battery efficiency, supply sequencing, and heat generated by the analog output stage. The manufacturer datasheet should be used to determine the exact power-consumption envelope and permissible operating temperature. Short I2S and clock routes, local decoupling, and a controlled ground arrangement are especially valuable where switching regulators and display circuitry share a compact enclosure.
推荐
Professional Audio Monitoring DAC
The AK4493EQ is well matched to a professional monitoring DAC because low distortion, 32-bit resolution, and 123 dB dynamic range are central to transparent playback. Its two-channel conversion supports left and right monitor outputs, while 768 kHz PCM and 22.4 MHz DSD support high-resolution studio sources. The converter should be paired with a balanced analog interface and an amplifier or active monitor appropriate for the confirmed output voltage and impedance. Clock jitter, digital return currents, and asymmetric analog routing can affect a monitoring system even when the DAC itself operates within specification. Use the manufacturer's reference configuration, maintain symmetrical analog traces, and avoid sharing sensitive output return paths with relay, fan, or display-control currents.
推荐
推荐产品汇总
工程参考数据： AK4493EQ ——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 | AK4490REQ | AK4493SEQ |
|---|---|---|---|
| Brand | Asahi Kasei Microdevices | Asahi Kasei Microdevices | Asahi Kasei Microdevices |
| Package | 48-LQFP (7 x 7 mm) | 48-LQFP (7 x 7 mm) | 48-LQFP (7 x 7 mm) |
| Converter Type | Stereo digital-to-analog converter | Stereo digital-to-analog converter | Stereo digital-to-analog converter |
| Number of Channels | 2 channels | 2 channels | 2 channels |
| Bit Resolution | 32 bit | 32 bit | 32 bit |
关键差异点
- Higher-resolution source support （对比 AK4490REQ)
- Premium sound architecture （对比 AK4490REQ)
- Verified dynamic-range positioning （对比 AK4493SEQ)
设计说明
Treat the I2S data, word-select, and master-clock routes as a matched, tightly controlled digital interface. Route the clock and data away from the analog outputs, use the shortest practical connection to the source device, and avoid routing them beneath output components or split analog ground planes. The verified excerpts identify I2S operation and up to 768 kHz PCM, so the implementation must use clock and timing arrangements explicitly supported by the manufacturer datasheet rather than extrapolating from lower-rate designs.
Preserve the analog output path with short, symmetric traces, suitable series damping, and a load network selected for the DAC's confirmed output architecture. Place analog-output components close to the package and keep digital-clock return currents out of the output reference path. The AK4493EQ's 123 dB dynamic range and low-distortion positioning make PCB-induced degradation significant even when the converter itself operates correctly.
Separate the converter's digital and analog supply paths as directed by the manufacturer and place the required bypass capacitors immediately beside their associated pins. Use low-noise local regulation where the datasheet noise-sensitive section calls for it. Do not infer capacitor values, rail voltages, sequencing, or permitted ripple from the product summary because those details are marked as needed data and must be obtained from the full AK4493EQ datasheet.
合规信息
The supplied verified excerpts do not contain explicit compliance statements for the AK4493EQ. Compliance fields therefore remain unknown rather than being inferred from general distributor listings.
