PCM1796DB - 24-Bit 192 kHz Stereo DAC | Texas Instruments
料号： PCM1796DB ✓ 量产中PCM1796DB 概述
An audio DAC is a data-conversion IC that transforms digital PCM samples into analog current signals suitable for a downstream operational amplifier, reconstruction filter, or speaker system. Within the semiconductor hierarchy, a DAC belongs to the ADC/DAC class of data-converter ICs. The PCM1796DB is designed for stereo audio conversion where signal fidelity, channel balance, and compatibility with digital audio interfaces are primary design considerations.
The converter supports 24-bit resolution and operation up to 192 kHz, while the listed DSD capability reaches 200 kHz. Its 123 dB signal-to-noise ratio supports low-noise conversion in demanding listening equipment. Balanced current outputs provide a flexible analog architecture, allowing the designer to optimize the external amplifier and filtering stages. Software control supports configurable system behavior when the DAC is managed by an audio controller or digital audio interface.
Internally, the PCM1796DB combines stereo digital-to-analog converters and support circuitry in one monolithic CMOS device. The segment DAC architecture separates the conversion function into smaller segments, improving dynamic behavior and reducing sensitivity to timing errors in the digital audio stream. This architecture is particularly useful in designs where incoming clock jitter could otherwise affect the analog output.
Typical applications include high-resolution CD and DVD audio players, network audio receivers, digital music systems, professional audio equipment, home-theater processors, and multichannel audio platforms. The balanced current-output topology can support transformer-balanced or line-level single-ended outputs when paired with suitable external circuitry. The converter is especially appropriate when a design requires 24-bit resolution and high sampling rates without using an external discrete DAC architecture.
The principal design consideration is the analog output stage. Because the device produces current rather than a finished voltage, component selection, current-to-voltage conversion, ground treatment, and reconstruction filtering directly influence sound quality. Place the DAC, its digital interface components, and the analog output circuitry according to the pin descriptions and application information in the manufacturer datasheet. Maintain the stated supply ranges of 3 V to 3.6 V and 4.75 V to 5.25 V.
This product page combines manufacturer specifications, application guidance, package information, and compatibility considerations for engineers evaluating the PCM1796DB. It also highlights the significance of its segment DAC architecture, 123 dB SNR, 192 kHz sampling capability, and 28-pin SSOP implementation when planning a high-fidelity audio converter stage.
直接替换替代料： PCM1796DB ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： PCM1796DB （相同外形与封装尺寸） ——差异在于 Clock Jitter Tolerance, Digital Audio Interface, Package, Process Technology.
PCM1795DB
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
PCM1796DB 最大额定值与电气特性
| Converter Type | Stereo audio digital-to-analog converter |
| DAC Architecture | Advanced segment DAC |
| 分辨率 | 24 bit |
| Maximum Sampling Rate | 192 kHz |
| DSD Rate | 200 kHz |
| Signal-to-Noise Ratio | 123 dB |
| 输出配置 | Balanced current outputs |
| Digital Audio Interface | PCM serial interface |
| Control Method | Software control |
| Core Supply Voltage Range | 3 V to 3.6 V |
| Analog Supply Voltage Range | 4.75 V to 5.25 V |
| 工作温度范围 | -25 C to +85 C |
| 封装 | 28-pin SSOP (DB) |
| Lead Count | 28 pins |
| Process Technology | Monolithic CMOS |
| 安装类型 | Surface mount |
| RoHS 状态 | unknown |
| REACH Status | unknown |
| Clock Jitter Tolerance | Improved by advanced segment DAC architecture |
PCM1796DB 28-pin ssop (db) 引脚配置指南
PCM1796DB（28-pin ssop (db) 封装）的引脚配置。 该模拟元件具有输入、输出和电源引脚。请参阅制造商数据手册以了解失调调零、补偿和使能引脚配置。适用于信号调理和放大器电路。
暂无详细引脚数据： PCM1796DB.
请参阅 数据手册 以查看完整引脚配置。
典型应用
PCM1796DB 适用于 6 应用s: High-Resolution Network Audio Receiver, CD and DVD Audio Player, Professional Audio Converter, Home-Theater Processor, Digital Music Player, USB Audio Interface.
High-Resolution Network Audio Receiver
The PCM1796DB fits a network audio receiver requiring 24-bit conversion at up to 192 kHz and balanced analog outputs. It accepts digital audio from a network-audio decoder and converts the PCM stream into current outputs for the receiver's line-level amplifier stage. Its 123 dB SNR supports low-noise playback, while the advanced segment DAC architecture improves tolerance to clock jitter from asynchronous digital transport paths. The analog section must provide current-to-voltage conversion and appropriate filtering before driving the output connector.
推荐
CD and DVD Audio Player
PCM1796DB is appropriate for a high-resolution CD or DVD player requiring a 24-bit stereo DAC with a 192 kHz sampling ceiling. The balanced current outputs can feed a carefully selected current-to-voltage amplifier and reconstruction-filter network, allowing the design to preserve channel symmetry. Its 123 dB SNR provides a useful noise margin in passive or active analog output stages. Clock and data lines must be routed according to the manufacturer interface guidance to avoid introducing jitter-related artifacts.
推荐
Professional Audio Converter
The PCM1796DB can serve as the conversion stage in professional monitoring, recording, and mastering equipment requiring balanced outputs. Its 24-bit resolution and 192 kHz maximum sampling rate suit high-resolution PCM workflows, while balanced current outputs support transformer-balanced or electronically balanced downstream circuitry. The 123 dB SNR specification leaves noise-margin room for careful analog design. Thermal stability, clean references, ground partitioning, and the manufacturer's recommended filtering network remain important for professional performance.
推荐
Home-Theater Processor
PCM1796DB is suitable for a home-theater processor that converts compressed or lossless digital audio into high-quality stereo analog signals. The 24-bit, 192 kHz capability supports modern lossless formats, while the segment DAC architecture provides improved tolerance to clock jitter in systems with multiple asynchronous clock domains. Balanced current outputs give the board designer flexibility over output topology and channel matching. The converter should be paired with a stable analog supply, low-noise references, and an appropriate reconstruction filter.
推荐
Digital Music Player
The PCM1796DB can provide the final conversion stage in a digital music player intended for high-resolution headphone or line-level playback. Its 123 dB SNR supports a quiet output floor, and balanced current outputs allow a low-noise amplifier stage with symmetrical channel construction. The 24-bit format and 192 kHz rate accommodate high-resolution source material. Designers should keep digital routing compact, isolate the analog output path, and select the external filter according to the device's documented frequency-response requirements.
推荐
USB Audio Interface
PCM1796DB is applicable to a USB audio interface that requires a high-performance stereo output converter. After a USB audio controller formats the stream, the PCM1796DB performs 24-bit conversion at rates up to 192 kHz and produces balanced current outputs. Its improved clock-jitter tolerance is valuable when the converter clock is derived from a separate asynchronous domain. The design still requires careful treatment of the digital interface, analog supplies, output current-to-voltage conversion, and reconstruction filtering.
推荐
推荐产品汇总
工程参考数据： PCM1796DB ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | PCM1795DB |
|---|---|---|
| Package | 28-pin SSOP (DB) | 28-pin SSOP |
| Brand | Texas Instruments | Texas Instruments |
| Converter Type | Stereo audio DAC | Stereo audio DAC |
| Resolution | 24 bit | 32 bit |
关键差异点
- Native 24-bit conversion with high-resolution playback support （对比 PCM1795DB)
- 123 dB signal-to-noise ratio （对比 PCM1795DB)
- High-rate stereo conversion with balanced current outputs （对比 PCM1795DB)
设计说明
Keep the PCM1796DB digital interface routing short and away from the current-to-voltage amplifier and reconstruction-filter network. The device's segment DAC architecture improves clock-jitter tolerance, but clock and data traces still require careful return-path continuity. Follow the manufacturer application layout for component placement and grounding, particularly where the digital interface crosses near the analog output section.
Decouple the 3 V to 3.6 V core supply and 4.75 V to 5.25 V analog supply independently. Place the recommended input capacitors at the corresponding IC pins and keep high-current digital return paths away from sensitive analog references. Supply-noise suppression at the converter is essential because a clean digital data stream does not prevent analog power disturbances from appearing in the output.
Design the external current-to-voltage conversion and reconstruction filtering around the balanced outputs rather than treating the DAC outputs as voltage outputs directly. Use the manufacturer reference circuit as the basis for component values, resistor matching, and filter topology. Maintain symmetrical left and right layouts so that matching component tolerances and ground return paths support channel balance.
Do not substitute PCM1795DB solely because its 28-lead SSOP footprint matches. PCM1795DB provides 32-bit conversion rather than the PCM1796DB's 24-bit conversion, and the digital word format, filter behavior, and operating conditions must be compatible with the complete system. Verify all interface and timing requirements in the manufacturer documentation before treating it as a drop-in replacement.
合规信息
Compliance classifications are not stated in the available product information and must be confirmed through current manufacturer documentation.
