PCM1748KE - 24-Bit Stereo Audio DAC | Texas Instruments
MPN： PCM1748KE ✓ 啟用中PCM1748KE 概覽
An audio DAC is an interface IC that reconstructs analog voltage signals from digital audio data. Its position in the signal chain is between a digital audio source, such as a transmitter, decoder, or audio processor, and an analog amplifier, mixer, headphone driver, or line output stage. The PCM1748KE belongs to the broader DAC, ADC/DAC, and integrated-circuit hierarchy while specializing in high-resolution stereo audio playback.
Key features include two 24-bit DAC channels, enhanced multilevel delta-sigma conversion, fourth-order noise shaping, and 8-level amplitude quantization. These features support the stated 106 dB signal-to-noise ratio and improve tolerance to clock jitter. The converter operates from 4.5 V to 5.5 V and is specified across a -25°C to +85°C temperature range.
Internally, the PCM1748 uses an enhanced multilevel delta-sigma architecture designed for excellent dynamic performance. Fourth-order noise shaping moves quantization noise away from the most sensitive part of the audio band, while 8-level amplitude quantization reduces demands on the internal conversion system. Digital audio data is accepted through a serial interface identified in the product listing as I2S-compatible.
Typical applications include digital-audio decoding, multichannel audio equipment, powered speakers, soundbars, compact home-audio systems, and industrial monitoring equipment. It is particularly useful when two analog outputs are required and a 24-bit conversion system is preferred over lower-resolution converters. Its 16-pin surface-mount package also supports compact audio boards.
Designers should treat the PCM1748KE as a digital-to-analog output stage rather than a complete line amplifier. The analog outputs still require appropriate filtering, grounding, and signal-path design for the intended load. Use the manufacturer pin-description table when assigning PCB tracks, and verify interface timing and output-mode requirements against the manufacturer datasheet before releasing the layout.
This page organizes the PCM1748KE technical details, package information, drop-in alternatives, application guidance, and design considerations into an engineering-focused selection reference. It also identifies where direct substitution requires careful comparison of interface, package, and operating requirements.
直接替換替代品，適用於 PCM1748KE — 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。
此系列的變體
與下列產品可直接替換的同系列型號： PCM1748KE （相同外形與佔位） — 差異在於 Amplitude Quantization, Package.
PCM1748KEG4
✅ 直接替換📋 參考替代品（不在目錄中）
PCM1748E
✅ 直接替換聯絡詢價
查看資料表 →PCM1742KE/2K
✅ 直接替換📋 參考替代品（不在目錄中）
PCM1748KE 最大額定值與電氣特性
| DAC Resolution | 24 bit |
| 取樣率 | 96 kS/s |
| Signal-to-Noise Ratio | 106 dB |
| Number of DAC Channels | 2 channels |
| Conversion Architecture | Enhanced multilevel delta-sigma |
| Noise-Shaping Order | Fourth order |
| Amplitude Quantization | 8 levels |
| Supply Voltage Range | 4.5 V to 5.5 V |
| 工作溫度範圍 | -25 C to +85 C |
| Digital Audio Interface | I2S-compatible serial interface |
| Analog Output Configuration | 2 channels |
| 封裝 | SSOP-16 (DBQ) |
| 腳位數 | 16 pins |
| 安裝類型 | Surface mount |
| Process Technology | CMOS |
| Integrated Circuit Type | Monolithic stereo DAC |
PCM1748KE ssop-16 (dbq) 腳位配置指南
PCM1748KE（ssop-16 (dbq) 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： PCM1748KE.
請參閱 資料表 以查看完整腳位配置。
典型應用
PCM1748KE 適用於 6 應用s: Digital Audio Decoding, Powered Speaker Audio Output, Home Audio and Soundbar Equipment, Industrial Audio Monitoring, Digital Audio Interface Cards, Multichannel Audio Equipment.
Digital Audio Decoding
The PCM1748KE fits digital audio decoding because it converts two 24-bit channels at a 96 kS/s sampling rate with a stated 106 dB SNR. Place it after the digital audio source and before the analog output filter and amplifier stages. Its enhanced multilevel delta-sigma architecture uses fourth-order noise shaping and 8-level amplitude quantization, supporting low-noise playback and improved clock-jitter tolerance without requiring two separate converter packages.
推薦
Powered Speaker Audio Output
The PCM1748KE can provide the analog stereo section of a powered-speaker design because it supplies two 24-bit DAC channels at up to 96 kS/s. Its 106 dB SNR supports quiet reconstruction of digital music or speech, while the 4.5 V to 5.5 V supply range fits a 5 V audio architecture. The DAC should feed the documented output-filter and amplifier network rather than connect directly to a loudspeaker.
推薦
Home Audio and Soundbar Equipment
For compact home-audio equipment and soundbars, the PCM1748KE combines 24-bit stereo conversion, 96 kS/s operation, and a 106 dB stated SNR in a 16-pin SSOP package. The small surface-mount package helps preserve board area while the dual-channel architecture simplifies left and right analog-output routing. Its 4.5 V to 5.5 V operating range supports conventional 5 V system rails found in consumer audio equipment.
推薦
Industrial Audio Monitoring
The PCM1748KE is appropriate for industrial monitoring systems that receive digital stereo audio and require a clean analog conversion stage. Two 24-bit channels at 96 kS/s support playback of standard high-resolution audio streams, while the stated 106 dB SNR provides useful dynamic range for speech, announcements, and background audio. Its -25°C to +85°C operating range is suitable for many industrial environments when other system-level requirements are met.
推薦
Digital Audio Interface Cards
The PCM1748KE fits interface cards requiring a compact two-channel DAC with documented digital input and analog outputs. Its 24-bit resolution, 96 kS/s sampling rate, and I2S-compatible serial interface support common embedded audio architectures. The SSOP-16 package permits placement close to the board edge or connector, while the converter still requires proper analog grounding, filtering, and output-stage implementation to preserve its 106 dB SNR performance.
推薦
Multichannel Audio Equipment
The PCM1748KE can serve each stereo pair in multichannel playback equipment because every converter provides two independent 24-bit DAC channels at 96 kS/s. This arrangement supports left and right outputs for front, surround, or zone channels while retaining a consistent converter architecture. Designers should budget power and analog-routing space for each SSOP-16 device and confirm clock distribution when multiple converters operate in one system.
推薦
推薦產品摘要
工程參考資料，適用於 PCM1748KE — 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 | PCM1748KEG4 | PCM1748E | PCM1742KE/2K |
|---|---|---|---|---|
| Package | SSOP-16 (DBQ) | SSOP-16 (DBQ) | SSOP-16 (DBQ) | SSOP-16 (DBQ) |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| DAC Resolution | 24 bit | 24 bit | 24 bit | 24 bit |
| Sampling Rate | 96 kS/s | 96 kS/s | 96 kS/s | 96 kS/s |
| DAC Channels | 2 channels | 2 channels | 2 channels | 2 channels |
| Supply Voltage Range | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V |
主要差異化特點
- Higher SNR than PCM1748E (對比PCM1748E)
- Same-family ordering-code option (對比PCM1748KEG4)
- Documented package and terminal consistency (對比PCM1742KE/2K)
設計說明
Route the PCM1748KE digital interface and clock signals away from the analog outputs and supply return path. Place the manufacturer-recommended input, output, and bypass capacitors at their specified pins with short traces. Keep the 16-pin SSOP footprint unobstructed on the board edge when practical, and use a continuous ground reference beneath the analog section to reduce digital coupling into the reconstructed audio signal.
Treat the serial audio and clock connections as timing-sensitive digital signals even though the converter operates from a single 5 V-class supply. Match the source clock and data timing to the manufacturer requirements, avoid unnecessary stubs, and provide a low-impedance return path for high-speed signals. This is particularly important because the PCM1748KE architecture is designed for improved tolerance to clock jitter, but that tolerance does not remove the need for a clean clock source.
Do not treat the PCM1748KE analog outputs as a complete loudspeaker driver. Confirm whether the design uses the documented single-ended or balanced output arrangement, install the required reconstruction filter, and verify downstream amplifier input requirements. Also check clock format, channel alignment, and output-mode control settings against the manufacturer datasheet to avoid a functioning converter producing incorrectly routed or unexpected audio.
Separate the digital input region from the analog output region and keep the output-filter components close to the relevant DAC pins. Use a quiet analog supply branch when the board also includes switching circuitry. Maintain consistent return-current paths beneath both digital and analog sections, and inspect the final layout for coupling between the clock signal, digital data lines, output components, and connector entries.
合規資訊
The product information identifies the PCM1748KE as a CMOS, 24-bit stereo DAC in an SSOP-16 package. Specific RoHS, REACH, AEC-Q100, lead-free, halogen-free, and conflict-minerals statements require confirmation in the manufacturer product documentation or declaration.
