PCM1725U - 16-Bit Stereo 96kHz Audio DAC | Texas Instruments
Référence : PCM1725U ✓ ActifPCM1725U Présentation
An audio DAC is a mixed-signal semiconductor that converts PCM-coded digital audio into left- and right-channel analog voltage signals. In the product hierarchy, PCM1725U is a stereo audio DAC within the ADC/DAC category, which combines digital signal processing, conversion technology, and analog output circuitry. The I2S interface carries framed audio data and clock signals between a digital audio source and the converter, while the DAC reconstructs continuous analog waveforms for subsequent amplification or line-level output.
The PCM1725U's headline specifications are 16-bit resolution, 96 kS/s sampling, 97 dB SNR, stereo output, and a 4.5 V to 5.5 V single-supply range. The 97 dB SNR rating is particularly useful when selecting a DAC for audio paths where quantization and conversion noise can affect perceived signal quality. The 96 kS/s maximum sampling rate supports higher-rate digital audio sources, including 48 kS/s and 88.2 kS/s standard-rate material and 96 kS/s high-resolution streams.
The delta-sigma modulator is the core conversion technique used in this device. Digital audio samples enter through the serial interface, where the delta-sigma modulation process reduces unwanted quantization noise within the signal bandwidth. The resulting analog outputs are intended to be conditioned by a suitable reconstruction and output stage. This architecture supports the stated 16-bit data resolution and 97 dB SNR while maintaining a conventional serial-audio interface.
Typical uses include digital audio player subsystems, USB or network-audio decoding, CD player output stages, industrial audio consoles, and communication equipment. The stereo format supports simultaneous left and right outputs, while the I2S interface simplifies connection to audio processors, DSPs, and microcontrollers that provide compatible serial data and clocks. The single 5 V supply also reduces the number of external rails required when the surrounding system already operates around 5 V.
A key implementation consideration is preserving the quality of the digital and analog paths around the converter. Place the PCM1725U close enough to the source interface for clean clock and data routing, and follow the manufacturer reference layout and component-selection guidance for decoupling, output filtering, and grounding. Because the available verified data does not expose the full pin table, output-current limits, or recommended external-component values, those details should be confirmed in the official PCM1725 datasheet before layout release.
This page combines the verified 16-bit, 97 dB, 96 kS/s, I2S, supply-range, and package facts with practical application guidance, verified-source links, and a transparent assessment of the available drop-in cross-reference data. It is intended to help engineers identify whether the PCM1725U matches a stereo DAC requirement without obscuring unspecified electrical details.
Alternatives de remplacement direct pour PCM1725U — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec PCM1725U (même facteur de forme et même empreinte) — différant par Digital Interface, Package.
PCM1725U/2K
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
PCM1725U/2KG4
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
PCM1725DR
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
PCM1725DG4
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
PCM1725U Valeurs maximales et caractéristiques électriques
| Product Type | Stereo audio digital-to-analog converter |
| Converter Resolution | 16 bit |
| Number of Channels | 2 channels |
| Signal-to-Noise Ratio | 97 dB |
| Maximum Sampling Rate | 96 kS/s |
| Digital Interface | I2S |
| Conversion Architecture | Delta-sigma |
| Type de sortie | Voltage output |
| Supply Type | Single supply |
| Nominal Supply Voltage | 5 V |
| Operating Supply Voltage Range | 4.5 V to 5.5 V |
| Boîtier | 14-pin SOIC (D) |
| Nombre de broches | 14 pins |
| Type de montage | Surface mount |
Guide de configuration des broches du PCM1725U 14-pin soic (d)
Configuration des broches du PCM1725U (boîtier 14-pin soic (d)). Ce composant analogique comporte des broches d'entrée, de sortie et d'alimentation. Consultez la fiche technique du fabricant pour les configurations des broches d'annulation d'offset, de compensation et d'activation. Idéal pour le conditionnement de signaux et les circuits amplificateurs.
Aucune donnée de brochage détaillée disponible pour PCM1725U.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
PCM1725U convient pour 6 applications: Digital Audio Player, USB and Network Audio Decoder, CD Player Output Stage, Industrial Audio Console, Communication Audio Terminal, Test and Measurement Audio Source.
Digital Audio Player
The PCM1725U fits a digital-audio player because it converts two 16-bit PCM streams into analog stereo outputs while supporting sampling rates up to 96 kS/s. Its I2S interface can receive framed left and right channel data from a dedicated audio processor, DSP, or digital transport controller. The specified 97 dB SNR provides a useful signal-to-noise benchmark for player designs, while the 4.5 V to 5.5 V single-supply range fits a 5 V audio architecture. The implementation should include the manufacturer-recommended bypass and reconstruction network, and the 14-pin SOIC package supports compact, conventional surface-mount layouts. Engineers should confirm output topology, maximum analog output range, and external filter values in the official datasheet before fixing the analog stage.
Recommandé
USB and Network Audio Decoder
In a USB or network-audio decoder, PCM1725U can serve as the final stereo DAC when the upstream controller supplies compatible I2S data and clocks. Its 16-bit resolution and 96 kS/s maximum sampling rate align with conventional PCM audio streams used by source processors and decoders. The I2S format reduces the number of parallel data connections, while the stereo outputs support independent left and right reconstruction paths. A key design benefit is the specified 97 dB SNR, which provides a measurable noise-floor reference for the analog reconstruction stage. The supply rail should remain within 4.5 V to 5.5 V, and clock routing, analog grounding, and output filtering must follow the manufacturer layout to prevent digital switching activity from degrading the reconstructed signal.
Recommandé
CD Player Output Stage
PCM1725U is appropriate for the analog-output portion of a CD player or other 44.1 kS/s digital-audio source. Although its maximum rate is 96 kS/s, that upper capability allows it to support multiple standard source rates when the digital front end selects the appropriate clock configuration. The converter's 16-bit interface resolution and 97 dB SNR suit conventional high-fidelity playback, and its two-channel voltage output maps directly to left and right reconstruction paths. The 5 V single-supply architecture can simplify integration with existing analog circuitry, provided the downstream amplifier accepts the converter's output range. Engineers should use the official PCM1725 data sheet to set the digital clock mode, reconstruction-filter values, analog output loading, and bypass capacitance rather than relying on generic DAC layouts.
Recommandé
Industrial Audio Console
The PCM1725U can provide the stereo conversion function in an industrial audio console that accepts digital audio from a control processor or DSP. Its I2S interface reduces wiring complexity, while 96 kS/s sampling and 16-bit resolution support common industrial monitoring and communications rates. The 97 dB SNR specification is relevant when preserving low-level audio cues or voice communications, and the 4.5 V to 5.5 V supply range permits operation from a regulated 5 V rail. Because industrial equipment can introduce EMI and ground-potential differences, keep I2S clock and data traces controlled, provide local bypass capacitors, and isolate analog and digital return paths as directed by the manufacturer reference layout. Confirm the converter's output swing and loading before selecting the following audio amplifier.
Recommandé
Communication Audio Terminal
PCM1725U is suitable for communication terminals when a digital signal processor supplies two-channel I2S audio and the system requires an analog stereo output. The device's 96 kS/s capability exceeds common voice-sampling requirements and permits reuse in equipment that also handles higher-quality audio notifications or playback. Its 97 dB SNR supports a high-quality conversion reference, while the single 5 V supply range can simplify integration into communications hardware. The I2S interface must be clocked consistently with the source processor, and the design should account for codec echo control, mute behavior, and analog output muting outside the DAC. The verified material does not provide the complete pin table or timing values, so those functions must be confirmed from the official PCM1725 datasheet before PCB implementation.
Recommandé
Test and Measurement Audio Source
PCM1725U can act as the stereo DAC in a compact test and measurement source that generates known digital-audio waveforms for validation of amplifiers, filters, and signal chains. Sixteen-bit resolution and 96 kS/s sampling provide useful numerical and bandwidth characteristics, while the 97 dB SNR specification provides a defined conversion-noise benchmark. The stereo voltage outputs allow differential channel measurements, and the 4.5 V to 5.5 V range simplifies operation from a common laboratory 5 V rail. Instrument designers should treat the converter output as a controlled source rather than a general-purpose power output, account for the output load, and preserve the recommended analog reconstruction network. Exact calibration behavior, output range, and bypass requirements remain to be verified from the manufacturer datasheet.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour PCM1725U — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | PCM1725U/2K | PCM1725U/2KG4 | PCM1725DR | PCM1725DG4 |
|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 14-pin SOIC (D) | 14-pin SOIC (D) | 14-pin SOIC (D) | 14-pin SOIC (D) | 14-pin SOIC (D) |
| Product Type | Stereo audio DAC | Stereo audio DAC | Stereo audio DAC | Stereo audio DAC | Stereo audio DAC |
Principaux différenciateurs
- Defined 97 dB SNR for stereo conversion (vs PCM1725U/2K)
- 96 kS/s conversion capability (vs PCM1725DR)
- I2S interface and voltage output in one stereo converter (vs PCM1725DG4)
Notes de conception
Use the Texas Instruments PCM1725 reference layout as the controlling guide for placement and routing. Keep the I2S data and clock traces short, avoid routing them alongside the analog outputs, and place bypass capacitors close to the associated supply pins. Separate noisy digital return current from the analog output reference. The supplied snippets do not provide the manufacturer's component values or pin numbers, so do not infer those details from a generic DAC layout.
Treat the I2S source clock as a critical digital signal. Route data and clock consistently, use a continuous reference plane, and avoid unnecessary stubs or test-probe discontinuities. The verified material identifies I2S operation and 96 kS/s maximum sampling but does not disclose allowed clock modes, setup times, or timing margins. Confirm those requirements in the official PCM1725 datasheet and the source processor's timing documentation before selecting edge rates or external buffering.
Do not assume that a 5 V nominal rail is the only supply requirement; the verified operating range is 4.5 V to 5.5 V, so transient excursions must be controlled. Also do not substitute a generic SOIC footprint based solely on pin count: the complete pin functions, exposed thermal considerations, and analog connections must match the official 14-pin D-package drawing. Verify output swing, permissible load, and recommended reconstruction-filter values before selecting downstream amplifiers.
Keep switching-regulator and digital-processor return paths away from the PCM1725 analog outputs. Place the DAC close to its digital source while routing the analog output toward the reconstruction and amplification stage with minimal loop area. If switching nodes are physically unavoidable, increase separation and use a defined ground strategy. The 97 dB SNR specification is useful for system-level comparison, but the final noise floor also depends on external filtering, grounding, and downstream amplifier selection.
Informations de conformité
The supplied verified snippets do not state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. These fields therefore remain unknown rather than being inferred from the manufacturer or package type.
