PCM1748KE - 24-Bit Stereo Audio DAC | Texas Instruments
MPN: PCM1748KE ✓ Hoạt độngPCM1748KE Tóm tắt
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.
Bộ thay thế dễ dàng lắp đặt cho PCM1748KE — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với PCM1748KE (cùng hình factor và footprint) — khác nhau ở Amplitude Quantization, Package.
PCM1748KEG4
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PCM1748E
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PCM1742KE/2K
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PCM1748KE Tỷ lệ tối đa & tính chất điện
| DAC Resolution | 24 bit |
| Tỷ lệ lấy mẫu | 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 |
| Khoảng nhiệt độ hoạt động | -25 C to +85 C |
| Digital Audio Interface | I2S-compatible serial interface |
| Analog Output Configuration | 2 channels |
| Hộp | SSOP-16 (DBQ) |
| Số chân | 16 pins |
| Kiểu lắp đặt | Surface mount |
| Process Technology | CMOS |
| Integrated Circuit Type | Monolithic stereo DAC |
Hướng dẫn cấu hình chân PCM1748KE ssop-16 (dbq)
Cấu hình chân cho PCM1748KE (ssop-16 (dbq) gói). Thành phần số hiệu này có chân đầu vào, đầu ra và nguồn cung cấp. Tham khảo tài liệu thông số kỹ thuật của nhà sản xuất để biết cấu hình chân bù, bù trừ và chân kích hoạt. Hoàn hảo cho điều kiện tín hiệu và mạch khuếch đại.
Không có dữ liệu chân cụ thể sẵn có cho PCM1748KE.
Tham khảo: tài liệu kỹ thuật cho cấu hình chân đầy đủ.
Ứng dụng tiêu biểu
PCM1748KE phù hợp cho 6 Áp dụngs: 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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PCM1748KE — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | 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 |
Bảo phân biệt quan trọng
- Higher SNR than PCM1748E (vsPCM1748E)
- Same-family ordering-code option (vsPCM1748KEG4)
- Documented package and terminal consistency (vsPCM1742KE/2K)
Ghi chú thiết kế
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.
Thông tin tuân thủ
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.
