PCM1796DB - 24-Bit 192 kHz Stereo DAC | Texas Instruments
MPN： PCM1796DB ✓ 啟用中PCM1796DB 概覽
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.
直接替換替代品，適用於 PCM1796DB — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： PCM1796DB （相同外形與佔位） — 差異在於 Clock Jitter Tolerance, Digital Audio Interface, Package, Process Technology.
PCM1795DB
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
PCM1796DB 最大額定值與電氣特性
| Converter Type | Stereo audio digital-to-analog converter |
| DAC Architecture | Advanced segment DAC |
| 解析度 | 24 bit |
| Maximum Sampling Rate | 192 kHz |
| DSD Rate | 200 kHz |
| Signal-to-Noise Ratio | 123 dB |
| 輸出配置 | 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 |
| 工作溫度範圍 | -25 C to +85 C |
| 封裝 | 28-pin SSOP (DB) |
| Lead Count | 28 pins |
| Process Technology | Monolithic CMOS |
| 安裝類型 | Surface mount |
| RoHS 狀態 | unknown |
| REACH Status | unknown |
| Clock Jitter Tolerance | Improved by advanced segment DAC architecture |
PCM1796DB 28-pin ssop (db) 腳位配置指南
PCM1796DB（28-pin ssop (db) 封裝）的腳位配置。 此類比元件具有輸入、輸出與電源腳位。偏移歸零、補償與致能腳位配置請參閱製造商資料表。適用於訊號調理與放大器電路。
無詳細腳位定義資料： PCM1796DB.
請參閱 資料表 以查看完整腳位配置。
典型應用
PCM1796DB 適用於 6 應用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.
推薦
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.
推薦
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.
推薦
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.
推薦
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.
推薦
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.
推薦
推薦產品摘要
工程參考資料，適用於 PCM1796DB — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | 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 |
主要差異化特點
- Native 24-bit conversion with high-resolution playback support (對比PCM1795DB)
- 123 dB signal-to-noise ratio (對比PCM1795DB)
- High-rate stereo conversion with balanced current outputs (對比PCM1795DB)
設計說明
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.
合規資訊
Compliance classifications are not stated in the available product information and must be confirmed through current manufacturer documentation.
