PCM5122PW - 112dB Stereo Audio DAC | Texas Instruments
N.º de pieza: PCM5122PW ✓ ActivoPCM5122PW Descripción general
A stereo audio DAC is a digital-to-analog converter that turns PCM audio samples into left and right analog voltage signals. Its position in the signal chain is between a digital audio source, such as a USB audio interface, Bluetooth receiver, or audio processor, and the output amplifier that ultimately drives headphones or powered speakers. The PCM5122 belongs to the audio DAC hierarchy within signal-conversion and interface ICs.
The PCM5122PW combines a 2 V RMS DirectPath output architecture with 112 dB dynamic range and fixed audio processing. Its stereo output stage is designed for high-fidelity audio rather than low-power telephone signaling. The 32-bit PCM interface accommodates high-resolution digital audio, while operation up to 384 kHz supports professional and high-resolution playback formats. I2C and SPI control capabilities allow the host to configure device functions.
The 28-pin TSSOP package provides a compact surface-mount implementation for multichannel audio products. Operation from 3 V to 3.6 V suits systems built around modern low-voltage digital audio processors. The -25 °C to +85 °C temperature range covers industrial and extended-temperature environments, although the complete system still requires appropriate analog and digital supply design.
Typical uses include high-end active speakers, digital audio appliances, network-audio players, soundbars, USB audio equipment, and premium headphone interfaces. The fixed processing functions can simplify implementation where standardized signal conditioning is preferable to a fully configurable codec. For multi-channel systems, multiple converter channels can be synchronized through the digital audio architecture.
The most important design tradeoff is output loading. DirectPath output stages can have different voltage, current, and stability requirements from ordinary line-output amplifiers, so the output network, grounding, and power-supply arrangement must follow the manufacturer recommendations. Confirm the selected output configuration and load range before finalizing the analog board layout.
This page combines the manufacturer’s device characteristics with drop-in replacement guidance, parameter comparisons, application guidance, and practical PCB and signal-integrity notes so engineers can evaluate PCM5122PW against alternatives before committing a board design.
Alternativas directas para PCM5122PW — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con PCM5122PW (mismo factor de forma y huella) — difiere en Output Architecture, Package.
PCM5122A
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
PCM5121PW
✅ Sustitución directa ⚠️ Especificaciones sin verificarConsulte el precio
Ver hoja de datos →PCM5122PW Valores máximos y características eléctricas
| Product Type | Stereo audio digital-to-analog converter |
| Configuración de salida | 2 channels |
| Dynamic Range | 112 dB |
| Maximum Output Amplitude | 2 V RMS |
| Digital Audio Resolution | Up to 32 bit |
| Maximum Sampling Rate | 384 kHz |
| Digital Audio Interface | PCM interface |
| Control Interface | I2C and SPI |
| Supply Voltage Range | 3 V to 3.6 V |
| Rango de temperatura de funcionamiento | -25 °C to +85 °C |
| Encapsulado | 28-pin TSSOP (PW) |
| Tipo de montaje | Surface mount |
| Output Architecture | DirectPath |
| Audio Processing | Fixed audio processing |
| Estado RoHS | unknown |
| REACH Status | unknown |
| AEC-Q100 Qualification | unknown |
Guía de configuración de pines de PCM5122PW 28-pin tssop (pw)
Configuración de pines para PCM5122PW (encapsulado 28-pin tssop (pw)). 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 PCM5122PW.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
PCM5122PW es adecuado para 6 aplicacións: High-Resolution Active Speaker, USB Audio Interface, Network Audio Player, Premium Headphone Amplifier, Digital Soundbar, Professional Audio Monitor.
High-Resolution Active Speaker
PCM5122PW fits a high-resolution active-speaker architecture because it converts two PCM audio channels with 112 dB dynamic range and supports operation up to 384 kHz. The 2 V RMS DirectPath output can simplify the signal path when the selected load remains within the device’s specified operating limits. Place the converter close to the analog output stage, provide a quiet 3 V to 3.6 V supply, and validate output stability against the actual speaker input network. The benefit is a compact digital-to-analog stage with high dynamic range; the design constraint is that loads outside the specified range may require additional buffering.
Recomendado
USB Audio Interface
PCM5122PW is suitable for a USB audio interface that converts high-resolution digital audio into a balanced or unbalanced analog output. Its 32-bit PCM interface, 384 kHz capability, and 112 dB dynamic range support demanding playback formats, while I2C or SPI control permits host-managed configuration. The converter should be synchronized to the USB audio clock domain and isolated from noisy digital return currents. A carefully partitioned analog ground and local supply decoupling can reduce converter-dependent noise. Compared with a lower-resolution DAC, the main engineering benefit is greater playback headroom and resolution, although clocking and grounding must remain disciplined.
Recomendado
Network Audio Player
PCM5122PW fits a network audio player that receives compressed or lossless audio from a processor and produces a high-quality analog signal. Its stereo topology matches two-channel speaker or headphone outputs, while 112 dB dynamic range and operation up to 384 kHz suit premium playback requirements. The device can sit at the boundary between the digital audio subsystem and the analog amplifier, allowing the network processor to control clocks and operating modes. Keep the PCM traces away from the analog output region and provide local bypass capacitance at the supply pins. The resulting advantage is a compact conversion stage that preserves high-resolution source information.
Recomendado
Premium Headphone Amplifier
PCM5122PW can form the digital front end of a premium headphone amplifier because its 2 V RMS DirectPath output is intended for direct audio-output use within specified load conditions. The 112 dB dynamic range supports low-noise playback, and the 3 V to 3.6 V digital supply simplifies integration with a modern audio controller. Confirm output current, DC offset, stability, and the manufacturer’s output-network requirements for the selected headphone impedance. If the headphone load is too demanding, add a dedicated amplifier rather than increasing drive beyond the specified conditions. This preserves signal quality while avoiding reliability problems.
Recomendado
Digital Soundbar
PCM5122PW is appropriate for a digital soundbar’s stereo main-output path because it combines two-channel conversion, fixed processing, 32-bit PCM support, and sampling rates up to 384 kHz. A soundbar processor can feed PCM data directly while using I2C or SPI for configuration, reducing the number of separate analog conversion stages. Place the converter in the low-noise analog region, isolate it from speaker-amplifier switching currents, and use controlled grounding between the digital and analog sections. The design benefit is high-fidelity conversion in a small 28-pin TSSOP footprint; the main tradeoff is ensuring the output load and supply arrangement meet the converter’s operating requirements.
Recomendado
Professional Audio Monitor
PCM5122PW can serve as the stereo DAC in a professional audio monitor when the design requires 112 dB dynamic range and support for high sampling rates up to 384 kHz. Its PCM interface accommodates digital audio from a workstation, DSP, or network decoder, while the compact TSSOP package leaves board area for analog amplification and connector isolation. Use controlled impedance routing for digital clock and data lines, provide clean supply bypassing, and follow the recommended analog-output network. Compared with a consumer-oriented DAC, the key advantage is the combination of channel count, dynamic range, and high-rate operation; system designers must still establish their own output bandwidth and noise targets.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para PCM5122PW — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | PCM5122A | PCM5121PW |
|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 28-pin TSSOP (PW) | 28-pin TSSOP (PW) | 28-pin TSSOP (PW) |
| Product Type | Stereo audio DAC | Stereo audio DAC | Stereo audio DAC |
Diferenciadores clave
- High dynamic range in a compact stereo DAC (frente a PCM5121PW)
- High-rate PCM conversion capability (frente a PCM5122A)
- 2 V RMS DirectPath output architecture (frente a PCM5121PW)
Notas de diseño
Separate the PCM5122PW analog output region from switching power stages and high-current amplifier outputs. Place its local supply bypass components next to the device, route digital clock and data lines away from the analog outputs, and keep the ground return path short. For a mixed-signal board, use the manufacturer ground and decoupling guidance as the basis for partitioning and return-current control.
Do not assume that any stereo DAC with a similar TSSOP package is electrically interchangeable with PCM5122PW. Verify pin assignments, register addresses, reset behavior, clock ratios, supported data formats, output configuration, and analog output requirements. A footprint match alone does not replace functional drop-in qualification, particularly when host firmware configures the converter through I2C or SPI.
Treat the PCM clock as a timing-critical signal and use the shortest practical route from the audio controller or clock source. Account for propagation delay when the system derives audio clocks across the board, and avoid loading the clock output more than the device supports. Validate the master-clock-to-audio-clock relationship at 384 kHz with the intended word length and the selected audio processing configuration.
Design the 3 V to 3.6 V rail with low noise because the PCM5122PW resolves high-rate PCM audio on a board that may also contain switching regulators and digital processors. Place bypass capacitance close to the supply pins, provide an uninterrupted ground reference, and monitor analog output noise during full-scale playback. Keep unrelated converter and amplifier currents out of the local return path.
Información de cumplimiento
The component information does not explicitly state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. These fields should be confirmed with the manufacturer before a compliance-controlled production release.