PCM1796DBR - 24-Bit 192kHz Stereo Audio DAC | Texas Instruments
N.º de pieza: PCM1796DBR ✓ ActivoPCM1796DBR Descripción general
A DAC (digital-to-analog converter) is an audio-class signal-chain IC that reconstructs a continuous analog voltage or current waveform from a digital bitstream. As a member of the broader digital-to-analog converter family, the PCM1796 belongs to the ADC/DAC category of data converters, which sit between digital audio transports and analog amplification stages, ultimately forming part of a power-management- and signal-integrity-managed audio system. Its balanced current-output topology is the classical high-end audio architecture because current-output DACs are far less sensitive to voltage-reference drift and to clock jitter than voltage-output devices.
Key features include 24-bit resolution at up to 192 kHz sampling, an advanced segment DAC core for low distortion, a jitter-tolerant three-wire serial interface for left/right clock, bit clock and data, programmable output gain, selectable digital filters and support for Direct Stream Digital streams up to 200 kHz DSD. Dynamic performance is characterized by very low total harmonic distortion plus noise and high signal-to-noise ratio, with the datasheet measurement conditions defined by a 20 Hz high-pass filter and a 20 kHz AES17 low-pass filter.
Internally, the data converters use TI's advanced segment DAC architecture, which divides the conversion into multiple current-steering segments to reduce the glitch energy generated at each code transition. That segmentation, combined with the jitter-insensitive data latch, is why the PCM1796 is commonly selected for CD, DVD, SACD, network and USB audio products where inter-channel and inter-sample errors are audible. Analog outputs are provided as differential current pairs so designers can balance each channel in the analog domain or drive a single-ended stage.
Typical applications include CD and DVD player digital output stages, SACD and optical-disc player DAC sections, network audio streamers, USB and computer audio interfaces, digital mixing consoles, headphone amplifier front ends and multi-channel home cinema audio processors. The balanced outputs pair naturally with the analog stages found in these systems.
When designing around the PCM1796DBR, treat the analog output as a current source: the output must be terminated by an I-to-V conversion stage, usually a resistor load plus an operational amplifier, and the load impedance directly shapes the achievable output voltage and distortion. Keep the digital interface short, provide a clean low-noise supply, and observe the recommended decoupling so clock jitter and supply ripple do not dominate the converter's own noise floor.
This page consolidates the manufacturer specifications, a structured drop-in replacement set drawn from the same TI stereo-DAC family, and practical analog and layout guidance that a datasheet alone does not present in engineering-decision form.
Alternativas directas para PCM1796DBR — 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 PCM1796DBR (mismo factor de forma y huella) — difiere en Clock Jitter Tolerance, Digital Interface, Output Type, Package, Process Technology.
PCM1795DBR
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
PCM1796DBRG4
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
PCM1792DBR
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
PCM1794DBR
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
PCM1798DBR
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
PCM1791DBR
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
PCM1680DBR
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
PCM1796DBR Valores máximos y características eléctricas
| Device Type | Stereo audio digital-to-analog converter (DAC) |
| Resolución | 24 bit |
| Maximum Sampling Rate | 192 kHz |
| DSD Support | Up to 200 kHz DSD |
| Canales | 2 (stereo) |
| DAC Architecture | Advanced segment DAC |
| Tipo de salida | Balanced current output (differential) |
| Digital Interface | Serial 3-wire (LRCK, BCK, DATA) |
| Clock Jitter Tolerance | Improved tolerance to clock jitter (segment DAC architecture) |
| Características | Programmable gain; digital filtering; differential output |
| Encapsulado | 28-lead SSOP (DBR), 208 mil |
| Tipo de montaje | Surface Mount |
| Estado RoHS | Compliant |
| Analog Performance Measurement | System Two Cascade audio measurement system, averaging mode |
| SNR Measurement Condition | 20-Hz HPF, 20-kHz AES17 LPF, A-weighted |
| Dynamic Range Measurement Condition | 20-Hz HPF, 20-kHz AES17 LPF, A-weighted |
| Channel Separation Measurement Condition | 20-Hz HPF, 20-kHz AES17 LPF, A-weighted |
| Process Technology | Monolithic CMOS integrated circuit |
Guía de configuración de pines de PCM1796DBR 28-lead ssop (dbr), 208 mil
Configuración de pines para PCM1796DBR (encapsulado 28-lead ssop (dbr), 208 mil). 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 PCM1796DBR.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
PCM1796DBR es adecuado para 6 aplicacións: CD and DVD Player DAC Section, Network and USB Audio Streamer, SACD and Optical Disc Player, Headphone Amplifier Output Stage, Digital Mixing Console and Studio Monitor Controller, Home Cinema and Multi-Channel Audio Processor.
CD and DVD Player DAC Section
The PCM1796DBR suits the digital-to-analog stage of a CD or DVD player because it accepts the 24-bit, 192 kHz PCM stream such transports deliver and converts it through the advanced segment DAC core, whose segmented current steering lowers the glitch energy that would otherwise appear as false high-frequency energy in the spectrum. The balanced current outputs feed directly into an I-to-V stage, allowing the analog designer to run each channel differentially and cancel even-order distortion and common-mode noise. The device's programmable gain and digital filtering give the firmware a way to align output levels between sources such as CD, DVD-Audio and digital inputs without touching the analog trim network, while its clock jitter tolerance means the DAC can sit close to a jitter-noisy transport clock without the noise floor rising noticeably.
Recomendado
Network and USB Audio Streamer
In a network or USB audio streamer, the PCM1796DBR acts as the final conversion element between a packet-based digital source and an analog output stage. Its 24-bit, 192 kHz capability covers the highest rates commonly offered by streaming services and local high-resolution libraries, while DSD support up to 200 kHz lets the same board accept Direct Stream Digital from a network player or a SACD rip without extra conversion hardware. The serial three-wire interface with left/right clock, bit clock and data keeps the digital link short and easy to route, and the advanced segment DAC architecture maintains good performance even when the source clock carries moderate jitter from an asynchronous network buffer. Balanced current outputs let the designer use a fully differential analog output stage that preserves channel separation.
Recomendado
SACD and Optical Disc Player
The PCM1796DBR is a natural choice for the DAC section of a SACD-capable player because it accepts both 24-bit PCM up to 192 kHz and DSD streams, allowing one conversion device to serve CD, DVD-Audio and SACD playback paths. Its balanced current outputs feed the player's fully differential analog chain, which is the conventional topology for high-end disc players because a differential output stage can suppress even-order distortion products and reject ground-coupled noise from the transport mechanism. Programmable gain lets the player align the DAC output level with the preamplifier input, and the digital filter controls allow the designer to choose between the sharp and gentle roll-off settings that different listeners and sample rates demand. Using one converter for every format also simplifies the analog design and halves the required output-stage circuitry.
Recomendado
Headphone Amplifier Output Stage
The PCM1796DBR can drive a high-quality headphone output stage in a headphone amplifier or desktop DAC, where it converts the digital stream into balanced current that an I-to-V network converts to voltage before the headphone driver stage. Because the current outputs are differential, a balanced headphone topology keeps even-order distortion and channel crosstalk low, which matters when the load is a difficult low-impedance headphone. The 24-bit, 192 kHz conversion capability preserves high-resolution sources, and the programmable gain allows the system to match headphone sensitivity without an extra attenuator in the analog path. Designers should confirm that the chosen load impedance keeps the current outputs inside their linear operating range and that the output network is laid out symmetrically to preserve channel balance at high frequencies.
Recomendado
Digital Mixing Console and Studio Monitor Controller
In a digital mixing console or studio monitor controller, the PCM1796DBR provides the stereo monitoring DAC, converting the console's internal digital mix into an analog line-level signal for the power amplifiers and nearfield monitors. Studio applications value the segment DAC architecture for its low distortion and its resilience to clock jitter, since a console mixes many sources and the digital clocking tree is shared across channels, making jitter immunity a practical advantage. The balanced current outputs map cleanly onto a transformer- or resistor-terminated balanced line output stage, which is standard in studio equipment for hum rejection and ground-loop avoidance. Programmable gain and digital filter selection let the monitoring path be calibrated to the room and to the reference level used in the mixing chain without hardware changes.
Recomendado
Home Cinema and Multi-Channel Audio Processor
The PCM1796DBR fits the stereo main and surround channels of a home cinema processor where a two-channel converter is required per pair of outputs, giving a cost-effective way to build multi-channel analog output stages with consistent performance. Because each device provides matched stereo balanced current outputs, several PCM1796DBR devices can populate the front, centre and surround channels of a 5.1 or 7.1 architecture, keeping channel-to-channel gain and distortion identical across the system. The 24-bit, 192 kHz conversion capability suits the lossless audio streams carried by modern surround processors, while the DSD path covers direct stream sources. Designers should budget the same balanced I-to-V network for every channel and keep the digital interface routing of adjacent devices short to preserve clock and data integrity across the board.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para PCM1796DBR — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | PCM1795DBR | PCM1796DBRG4 | PCM1792DBR | PCM1794DBR | PCM1798DBR |
|---|---|---|---|---|---|---|
| Package | SSOP-28 (DBR), 208 mil | SSOP-28 (DBR), 208 mil - same | SSOP-28 (DBR), 208 mil - same | SSOP-28 (DBR), 208 mil - same | SSOP-28 (DBR), 208 mil - same | SSOP-28 (DBR), 208 mil - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Resolution | 24 bit | 32-bit-capable converter | 24 bit | 24 bit | 24 bit | 24 bit |
| Maximum Sampling Rate | 192 kHz | 192 kHz | 192 kHz | 192 kHz | 192 kHz | 192 kHz |
| DAC Architecture | Advanced segment DAC | Segment DAC | Advanced segment DAC | Segment DAC | Segment DAC | Advanced segment DAC |
| Output Type | Balanced current output (differential) | Current output | Balanced current output (differential) | Current output | Current output | Current output |
| RoHS Compliance | Compliant | Compliant | Compliant | Compliant | Compliant | Compliant |
Diferenciadores clave
- Handles PCM and DSD in a single 24-bit converter (frente a PCM1792DBR)
- Pin-by-pin compatible upgrade path within the same family (frente a PCM1795DBR)
- Broader operating-mode control for multi-source systems (frente a PCM1794DBR)
- Segment DAC core for dynamic performance and jitter tolerance (frente a PCM1680DBR)
Notas de diseño
The PCM1796DBR outputs are current sources, not voltage outputs. Connecting the OUT pins directly to a speaker or to a low-impedance load will not produce a usable signal and may damage the device. Each output pair must terminate in an I-to-V network, typically a resistor from each output to ground followed by a differential amplifier that converts the differential current into a voltage. Use the pin-description table in the manufacturer datasheet to assign the output pins to the correct network and to keep the two channels' networks symmetric.
Keep the digital interface traces (LRCK, BCK and DATA) short and referenced to a solid ground plane, and place the device close to the digital source so that clock edges are not degraded by long stubs. Route the analog output nets away from the digital and clock lines, because the balanced current outputs are high-impedance nodes that pick up coupling easily. The manufacturer datasheet's recommended layout shows the analog and digital ground returns meeting at a single point near the device, which prevents digital return currents from flowing through the analog output reference and preserves the noise floor the segment DAC architecture is designed to deliver.
Follow the manufacturer's recommended supply connections and decoupling in the datasheet, and place the bypass capacitors directly at the supply pins rather than at the connector. Audio DACs convert small currents into measurable output voltages, so supply ripple on the analog rail is multiplied by the gain of the I-to-V stage. Use separate local regulation for the analog supply where the board allows it, and verify that the digital supply that carries the master clock is not shared with switching converter outputs. Verify the actual supply rails and current consumption against the datasheet before releasing the layout.
The advanced segment DAC architecture was chosen for its improved tolerance to clock jitter, but that tolerance is not unlimited. When the converter is driven from an asynchronous source such as a network player or a USB interface, regenerate the master clock locally with a low-jitter clock synthesizer and keep the data and bit-clock lines matched in length. Also, when the system accepts DSD as well as PCM, confirm that the sample-rate and filter commands issued by the host firmware match the actual stream, since an incorrect filter configuration can produce audible level or bandwidth differences that are easily mistaken for converter degradation.
Información de cumplimiento
The PCM1796DBR is listed as ROHS compliant in distributor product data. The PCM1796DBRG4 ordering code denotes the green/lead-free catalog option for the same device. No AEC-Q100 qualification applies to this consumer and professional audio converter.
