PCM1748E/2K - 24-Bit Stereo Audio DAC | Texas Instruments
N.º da peça: PCM1748E/2K ✓ AtivoPCM1748E/2K Visão geral
An audio DAC is a semiconductor that converts digital PCM audio data into analog voltage signals suitable for headphone, line, amplifier, mixer, or recording-system input stages. Within the signal-chain hierarchy, the PCM1748E/2K is an audio DAC, which is a type of digital-to-analog converter and data-conversion IC. Its stereo architecture supports simultaneous left- and right-channel playback while reducing the number of separate converter packages required on a compact audio board.
The principal features include 24-bit conversion resolution, a 96 kHz sampling rate, 100 dB typical dynamic range for the PCM1748E grade, enhanced multilevel delta-sigma architecture, fourth-order noise shaping, and 8-level amplitude quantization. Its 3-wire serial digital interface accepts digital audio data and clock signals, while the analog outputs provide a straightforward path to downstream amplification. The converter is designed for consumer and professional audio equipment where compactness, dynamic range, and clock-jitter performance are important.
The internal fourth-order noise-shaping architecture moves quantization noise away from the most audible low-frequency region, while multilevel quantization reduces demands on the digital-to-analog conversion filters. This architecture supports accurate reproduction of music and speech signals at relatively low analog output amplitude. Clock jitter tolerance is improved compared with simpler delta-sigma converters, although system-level performance still depends on clean supplies, stable clocking, correct digital timing, and properly implemented output filtering.
Typical uses include powered speakers, compact USB audio interfaces, headphone amplifier boards, digital mixing consoles, multimedia equipment, and home-audio playback modules. PCM1748E/2K is particularly suitable where two analog output channels are required but a six-channel or more complex multichannel DAC would add unnecessary cost and board area. A companion codec or digital interface must supply valid PCM data, while the DAC converts that data into left and right analog outputs.
For layout, place the analog output components and their return paths close to the device, maintain a quiet analog ground reference, and separate digital clock and data routing from sensitive output nodes. Use stable low-noise supply decoupling and follow the pin-description table in the manufacturer datasheet when assigning PCB tracks. PCB footprint and pin assignment should be checked against the exact SSOP-16 ordering suffix before release.
This product data combines the manufacturer architecture description with a side-by-side family comparison, practical layout guidance, and drop-in replacement analysis. It is intended to help engineers identify the correct Texas Instruments orderable variant, assess its conversion performance, and integrate it into a repeatable audio-system design.
Alternativas drop-in para PCM1748E/2K — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com PCM1748E/2K (mesmo formato e footprint) — diferindo em Amplitude Quantization, Digital Interface.
PCM1748KE/2K
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
PCM1748KEG4
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
PCM1748E/2K Classificações máximas e características elétricas
| Product Type | Stereo audio digital-to-analog converter |
| Converter Resolution | 24 bit |
| Taxa de amostragem | 96 kHz |
| Dynamic Range | 100 dB typ for PCM1748E at VCC = 5 V |
| Signal-to-Noise Ratio | 100 dB typ for PCM1748E |
| Number of Audio Channels | 2 stereo channels |
| Tipo de saída | Voltage output |
| Conversion Architecture | Enhanced multilevel delta-sigma |
| Noise-Shaping Order | Fourth order |
| Amplitude Quantization | 8 levels |
| Digital Interface | 3-wire serial interface |
| Analog Supply Voltage | 4.5 V to 5 V |
| Faixa de temperatura de operação | -25 °C to 85 °C |
| Encapsulamento | SSOP-16 |
| Tipo de montagem | Surface mount |
| Process Technology | CMOS |
| Carrier Configuration | Custom reel |
Guia de Configuração de Pinos do PCM1748E/2K ssop-16
Configuração de pinos para PCM1748E/2K (pacote ssop-16). Este componente analógico possui pinos de entrada, saída e alimentação. Consulte o datasheet do fabricante para configurações de offset null, compensação e pino de enable. Ideal para circuitos de condicionamento de sinal e amplificadores.
Nenhum dado detalhado de pinagem disponível para PCM1748E/2K.
Consulte a ficha técnica para a configuração completa dos pinos.
Aplicações típicas
PCM1748E/2K é adequado para 6 aplicaçãos: Powered Stereo Speakers, USB Audio Interface, Headphone Amplifier Board, Digital Mixing Console, Multimedia Amplifier Module, Home Audio Network Player.
Powered Stereo Speakers
PCM1748E/2K fits powered-speaker electronics that require two high-quality analog playback channels from a digital source. Its 24-bit resolution, 96 kHz sampling capability, and 100 dB typical dynamic range preserve a useful margin between the digital program and the system's noise floor. Place the two voltage outputs close to the input network and stereo amplifier, use a low-noise 4.5 V to 5 V analog supply, and keep amplifier input returns away from digital clock routing. The converter's fourth-order noise shaping and multilevel quantization support low distortion and improved clock-jitter tolerance, while the SSOP-16 package reduces board area compared with two separate mono DACs.
Recomendado
USB Audio Interface
PCM1748E/2K is suitable for a compact USB-to-analog audio interface when the USB controller or codec supplies compatible PCM data and clocking. The DAC's 3-wire serial interface supports integrated left and right channels, while its 24-bit, 96 kHz conversion provides suitable fidelity for high-resolution playback. Clock quality remains critical, so route the master clock and serial data away from analog output components and provide a low-noise local supply. Its 100 dB typical dynamic range can form a clean endpoint for headphone or line-level stages, and the compact SSOP-16 footprint simplifies multi-output desktop and portable audio products.
Recomendado
Headphone Amplifier Board
PCM1748E/2K can provide the digital-to-analog stage for a stereo headphone-amplifier board. Two voltage outputs allow the left and right channels to feed a balanced dual-headphone amplifier, while 100 dB typical dynamic range supports a clean input signal for the analog stage. Place output resistors or the documented filter network close to the DAC pins, maintain a quiet analog return path, and keep switching supplies and digital clock traces away from the sensitive nodes. The SSOP-16 package supports compact portable equipment, while the converter's enhanced multilevel delta-sigma architecture provides good performance without requiring separate mono DAC packages.
Recomendado
Digital Mixing Console
PCM1748E/2K is appropriate for monitoring, auxiliary, or compact stereo output sections in a digital mixing console. Its stereo channels support simultaneous left and right conversion, and the 24-bit, 96 kHz format accommodates professional digital audio workflows. The converter's fourth-order noise shaping moves quantization noise away from the most sensitive low-frequency region, while 8-level amplitude quantization improves tolerance to clock variations. Use clean references and isolated supply routing for each analog section, and follow the manufacturer output-filter recommendations before driving line-level circuitry. The small SSOP-16 package helps conserve board area in densely populated console electronics.
Recomendado
Multimedia Amplifier Module
PCM1748E/2K can serve as the stereo DAC in a multimedia module that converts compressed or linear digital audio into analog signals for amplification. The 100 dB typical dynamic range provides useful headroom for typical listening environments, while 24-bit resolution and 96 kHz sampling support high-quality source material. The 3-wire serial interface reduces the required data connections compared with a parallel converter. Keep the DAC's analog supply decoupled near the device, preserve a continuous ground return beneath analog outputs, and isolate the module's switching regulators from the stereo outputs. Its small SSOP-16 package is useful in compact desktop speakers, display audio modules, and combined amplifier boards.
Recomendado
Home Audio Network Player
PCM1748E/2K fits a network audio player that receives digital music from a host processor and produces stereo analog output for a power amplifier. Its 96 kHz sampling capability supports high-resolution playback, while the 24-bit conversion and 100 dB typical dynamic range provide a solid signal foundation for a domestic listening environment. Use a stable low-jitter clock, short digital traces, and separate analog and digital return paths to prevent switching and data activity from modulating the outputs. The dual-channel SSOP-16 implementation reduces component count and board area, making it practical for compact network speakers and living-room audio endpoints.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para PCM1748E/2K — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | PCM1748KE/2K | PCM1748KEG4 |
|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | SSOP-16 | SSOP-16 | SSOP-16 |
| Converter Resolution | 24 bit | 24 bit | 24 bit |
| Sampling Rate | 96 kHz | 96 kHz | 96 kHz |
| Dynamic Range | 100 dB typ at VCC = 5 V | 106 dB typ | 106 dB typ |
| Audio Channels | 2 stereo channels | 2 stereo channels | 2 stereo channels |
| Conversion Architecture | Enhanced multilevel delta-sigma | Enhanced multilevel delta-sigma | Enhanced multilevel delta-sigma |
| Noise Shaping | Fourth order | Fourth order | Fourth order |
| Amplitude Quantization | 8 levels | 8 levels | 8 levels |
| Analog Supply Voltage | 4.5 V to 5 V | 4.5 V to 5 V | 4.5 V to 5 V |
Principais diferenciais
- Direct PCM1748-family drop-in upgrade path (vs PCM1748KE/2K)
- Higher-performance family option in the same footprint (vs PCM1748KEG4)
- Compact integration for stereo playback (vs PCM1741E)
Notas de projeto
Keep the PCM1748E/2K analog outputs and their documented output-filter components close to the device, while routing serial data and clock signals away from those nodes. Maintain a continuous analog ground reference beneath the converter and output network, and connect digital and analog return currents carefully at the system ground point. This separation reduces coupling from switching power converters, processor traces, and high-current amplifier outputs into the stereo analog path.
Use a quiet 4.5 V to 5 V analog supply for the converter and place the required local decoupling capacitors at the supply and ground pins. The manufacturer performance characterization uses VCC = 5 V for the PCM1748E dynamic-range value, so the operating point should match that condition when reproducing the specified performance. Avoid routing the analog supply through digital switching-current paths, and verify the supply remains within range under audio bursts and processor load transients.
Provide stable, low-jitter clocking to the serial interface and maintain controlled timing between the system clock and audio data. The enhanced multilevel delta-sigma architecture improves clock-jitter tolerance, but it does not remove the need for a clean reference and correct data synchronization. Short digital routes, solid return paths, and isolation from high-current outputs are appropriate measures for preserving channel separation, dynamic range, and low distortion.
Do not substitute a different SSOP-16 device solely because the package dimensions match. Confirm every pin name, analog and digital supply arrangement, output definition, and recommended filter connection against the manufacturer datasheet. The /2K ordering suffix denotes the manufacturer packaging configuration and should be maintained when procurement documentation and the PCB bill of materials are prepared.
Informações de conformidade
The PCM1748E/2K is an audio converter rather than an automotive-qualified product; no AEC-Q100 qualification is indicated.