PCM1733U - 18-Bit 96 kHz Stereo Audio DAC | Texas Instruments
N.º de pieza: PCM1733U ✓ ActivoPCM1733U Descripción general
An audio DAC is a semiconductor that accepts digital PCM audio samples and reconstructs their corresponding analog voltages. In the electronic-component hierarchy, an audio DAC belongs to the broader ADC/DAC conversion IC category and ultimately falls within signal-processing semiconductors. This distinction matters because a DAC does not amplify or generate the source recording; it converts encoded digital samples into an analog output that can drive a headphone, line-level, or downstream audio amplification stage.
The PCM1733U provides 18-bit resolution, 96 kHz sampling, stereo operation, and an I2S interface. Its 97 dB SNR rating describes the signal-to-noise performance available to downstream analog circuitry. The part is listed with a single 5 V supply and an operating temperature range of -25°C to +85°C in the verified distributor data. Its 14-pin SOIC package supports conventional surface-mount PCB assembly and is compatible with automated pick-and-place and reflow processes.
At the digital side, the PCM1733U accepts serial audio data through its I2S interface, reducing the number of interconnects required compared with a parallel audio converter. The 18-bit word length provides finer numerical granularity than a 16-bit converter, while 96 kHz supports the stated sampling rate required by CD-quality audio formats. At the analog side, the converter produces differential stereo outputs, allowing the output network and audio amplifier to reject common-mode disturbances when the circuit is designed accordingly.
Typical applications include stereo CD and DVD playback, digital audio receivers, mini-disc systems, home-theater equipment, active speakers, and other consumer audio products. In each application, the PCM1733U can serve as the final digital-to-analog conversion stage before a low-noise line amplifier or headphone driver. A complete design must still provide suitable clocking, decoupled analog and digital supplies, a correctly designed reconstruction or output filter, and short signal paths to minimize noise pickup.
For PCB implementation, keep the digital interface traces away from the analog outputs and place input, output, and bypass capacitors close to their associated pins. Verify the supported master-clock and sample-rate requirements against the manufacturer datasheet before fixing system clock architecture. If output circuitry differs between the original design and a replacement candidate, evaluate DC offset, full-scale amplitude, and filter response rather than assuming that the same package guarantees identical behavior.
This product data consolidates the verified manufacturer and distributor information, provides application-specific engineering context, and separates documented specifications from values that remain unavailable. It also highlights the main substitution risk: a 14-pin SOIC footprint alone does not prove that every stereo DAC is pin-to-pin, clock-compatible, and output-compatible with the PCM1733U.
Alternativas directas para PCM1733U — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
PCM1733UG4
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
PCM1733U/2KG4
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
PCM1725DR
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
PCM1733U Valores máximos y características eléctricas
| Product Type | Stereo audio digital-to-analog converter (DAC) |
| Manufacturer | Texas Instruments |
| Resolución | 18 bit |
| Maximum Sampling Rate | 96 kHz |
| Signal-to-Noise Ratio | 97 dB |
| Digital Audio Interface | I2S |
| Number of Audio Channels | 2 channels |
| Tensión de alimentación | 5 V |
| Rango de temperatura de funcionamiento | -25°C to +85°C |
| Encapsulado | 14-pin SOIC (D) |
| Tipo de montaje | Surface mount |
| Product Series | SoundPlus |
Guía de configuración de pines de PCM1733U 14-pin soic (d)
Configuración de pines para PCM1733U (encapsulado 14-pin soic (d)). Este componente analógico presenta pines de entrada, salida y alimentación. Consulte la hoja de datos del fabricante para conocer las configuraciones de los pines de ajuste de offset, compensación y habilitación. Ideal para circuitos de acondicionamiento de señal y amplificadores.
No hay datos detallados de patillaje disponibles para PCM1733U.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
PCM1733U es adecuado para 6 aplicacións: CD and Digital Audio Player, Home Theater Audio Receiver, Stereo Active Speaker, Digital Audio Receiver, Professional Audio Monitoring, Multimedia Speaker and Dock.
CD and Digital Audio Player
The PCM1733U fits a CD or digital-audio playback path because it provides 18-bit stereo conversion at a maximum 96 kHz sampling rate and uses an I2S interface for serial digital audio. Place the converter after the digital source and before the analog line amplifier, then use the manufacturer's recommended reconstruction and output network. The 97 dB SNR specification provides a concrete system target, while the 5 V supply simplifies integration with common consumer-audio voltage rails. Compared with a 16-bit converter, the 18-bit word length reduces numerical quantization granularity, but actual audible improvement also depends on the source, clock jitter, analog filtering, and downstream amplifier noise.
Home Theater Audio Receiver
PCM1733U is suitable for a home-theater receiver that converts digital PCM streams into left and right analog channels before volume control and power amplification. Its 96 kHz maximum rate accommodates the verified target operating class, while 18-bit resolution preserves finer sample-value granularity than a 16-bit DAC. The I2S interface reduces wiring between the digital audio processor and converter. Designers should pay particular attention to supported master-clock modes, channel alignment, and output-filter values because those details are not exposed in the supplied search snippets and must be confirmed in the manufacturer datasheet before layout release.
Stereo Active Speaker
An active speaker can use the PCM1733U as the bridge between a digital audio source and its internal analog power amplifier. The stereo DAC provides dedicated left- and right-channel conversion at 18 bits and up to 96 kHz, with a documented 97 dB SNR target that helps define the source-to-amplifier signal quality. Place the converter near the amplifier input to minimize analog trace length, and separate digital clock and data traces from the analog outputs. The converter does not replace the power amplifier or speaker protection network, so output level, DC offset, and filter compatibility must be verified against the chosen amplifier input.
Digital Audio Receiver
PCM1733U is appropriate for a digital audio receiver that accepts I2S audio from a transport, processor, or interface and produces stereo analog outputs. The 18-bit resolution and 96 kHz maximum sampling rate support high-quality consumer audio conversion, while the single 5 V operating supply simplifies analog and digital rail planning. A practical implementation should decouple the supply pins locally, route clock and data away from the analog output region, and verify supported clock ratios before selecting the digital source. The stated 97 dB SNR should be treated as a device-level target rather than guaranteed end-system performance.
Professional Audio Monitoring
The PCM1733U can serve as the DAC stage in a professional monitoring path where 18-bit conversion and 97 dB SNR are useful baseline specifications. It converts the stereo digital stream into differential analog signals for a low-noise line stage or balanced headphone driver. Because monitoring systems are sensitive to clock jitter, ground contamination, and output distortion, the implementation should follow the manufacturer reference circuit closely, maintain short analog paths, and verify the external filter against the intended output impedance. The available data does not state THD, dynamic range, or jitter figures, so those values must be reviewed in the official datasheet before a precision monitoring design is approved.
Multimedia Speaker and Dock
PCM1733U is a practical fit for a multimedia speaker or system dock that receives digital audio from a host processor and drives an analog amplifier. The I2S interface supports a compact digital connection, while the 14-pin SOIC package is compatible with standard surface-mount manufacturing. Its 5 V supply can simplify integration, although the design must still provide clean, decoupled analog power. Compared with an integrated codec, a discrete PCM1733U can provide a dedicated 18-bit conversion stage at 96 kHz. Firmware, clock configuration, channel mapping, and analog gain must be coordinated with the host SoC to prevent incorrect sample framing or an unexpected output level.
Datos de referencia de ingeniería para PCM1733U — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | PCM1733UG4 | PCM1733U/2KG4 | PCM1725DR |
|---|---|---|---|---|
| Package | 14-pin SOIC (D) | 14-pin SOIC (D) | 14-pin SOIC (D) | 14-pin SOIC (D) |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Resolution | 18 bit | 18 bit | 18 bit | 16 bit |
| Maximum Sampling Rate | 96 kHz | 96 kHz | 96 kHz | 96 kHz |
| Audio Channels | 2 channels | 2 channels | 2 channels | 2 channels |
| Mounting Type | Surface mount | Surface mount | Surface mount | Surface mount |
Diferenciadores clave
- Higher conversion resolution than PCM1725DR (frente a PCM1725DR)
- Documented high-SNR stereo conversion (frente a PCM1725DR)
- Verified I2S integration (frente a PCM1725DR)
Notas de diseño
Separate the I2S data and clock routing from the analog output region. Keep the PCM1733U's analog traces short and route them away from digital clock edges and switching-supply nodes. Place analog and digital decoupling capacitors close to their respective supply pins, with the shortest possible return path to the device ground. The supplied data confirms the 14-pin SOIC package but does not specify a pinout, so engineers must obtain the official pin map before assigning decoupling or filter components to particular pins.
Do not select a replacement based only on the 14-pin SOIC outline. Confirm pin assignments, supply requirements, master-clock behavior, digital input format, channel mapping, analog output polarity, full-scale amplitude, and external filter recommendations in the manufacturer datasheet. In particular, PCM1725DR is identified as a 16-bit 96 kHz stereo DAC in a 14-SOIC package, but the supplied comparison evidence does not establish complete pin compatibility with the 18-bit PCM1733U.
The verified 97 dB SNR specification represents a device-level signal-to-noise target, not guaranteed system performance. Printed-circuit noise, clock jitter, ground bounce, and poor output-filter design can degrade the result. Use a stable audio clock, maintain a continuous ground reference under the analog pins, and evaluate the complete output path with the intended amplifier load. Clock-frequency and jitter limits require confirmation from the manufacturer datasheet because they are absent from the supplied search data.
Plan the 5 V supply to provide low-noise power for both digital and analog sections of the PCM1733U. Place local high-frequency bypass capacitance at the supply pins and keep input and output return currents from sharing narrow paths. The available data confirms single-supply operation at 5 V but does not provide recommended capacitor values or allowable supply ripple, so those values must be taken directly from the manufacturer application guidance before schematic release.
Información de cumplimiento
The verified search data identifies lead-free ordering variants but does not provide explicit compliance statements for the PCM1733U. RoHS, REACH, halogen-free, and conflict-minerals status are therefore unknown.
