PCM1793DB - 24-Bit 192kHz Stereo DAC | Texas Instruments
MPN： PCM1793DB ✓ 啟用中PCM1793DB 概覽
A digital-to-analog converter, or DAC, converts digital audio samples into an analog voltage waveform. The PCM1793 belongs to the broader hierarchy of stereo DAC, audio converter, signal-conversion IC, and semiconductor. Balanced voltage outputs support noise-rejecting analog signal paths, allowing a designer to optimize the output stage for the target amplifier and load. Its I2S-compatible digital interface accepts audio data from a digital audio source, while the DAC performs the final conversion before the analog output stage.
The principal features are 24-bit resolution, a maximum sampling rate of 192 kHz, balanced outputs, 113 dB dynamic range, and a typical THD+N of 0.001%. Hardware control provides an external interface for adjusting supported operating functions without relying entirely on software commands. The advanced segment DAC architecture is specifically designed to improve dynamic performance and reduce sensitivity to timing variations in the incoming digital clock.
The converter uses a monolithic CMOS implementation containing stereo digital-to-analog converters and associated support circuitry. Balanced voltage outputs distinguish the PCM1793 from converters that provide differential current outputs. At the postamplifier, a typical full-scale output of 2.1 V rms provides a defined analog reference level for subsequent voltage amplification or line-level routing. Its operating supply range is 4.5 V to 5.5 V.
Typical applications include high-resolution stereo audio equipment, CD and DVD player digital audio paths, professional audio converters, powered speakers, headphone-amplifier front ends, and digital audio system boards. The balanced output topology is useful when the downstream circuitry supports balanced inputs, while a carefully designed single-ended summing network can serve conventional line outputs.
Designers should treat the power supply, digital clock, ground layout, and output network as a complete signal-chain design. Place decoupling and output-network components close to their associated pins, keep analog return paths separate from switching and digital return currents, and provide filtering appropriate to the audio bandwidth. The SSOP package also requires attention to solder-joint quality and thermal conditions during assembly.
This product overview combines converter architecture, key electrical characteristics, application guidance, package information, and sourcing-oriented details. It is intended to help engineers determine whether the PCM1793DB's balanced voltage output, dynamic performance, and interface characteristics fit a stereo DAC design before beginning a detailed schematic and layout review.
直接替換替代品，適用於 PCM1793DB — 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。
此產品無可直接替換的替代品。
申請替代品PCM1793DB 最大額定值與電氣特性
| Converter Type | Stereo audio digital-to-analog converter |
| 解析度 | 24 bit |
| Maximum Sampling Rate | 192 kHz |
| Digital Audio Interface | I2S |
| Output Architecture | Balanced voltage output |
| Typical Signal-to-Noise Ratio | 113 dB |
| Typical THD+N | 0.001% |
| Typical Full-Scale Output | 2.1 V rms at the postamplifier |
| Supply Voltage Range | 4.5 V to 5.5 V |
| DAC Architecture | Advanced segment DAC architecture |
| Process Technology | CMOS |
| 封裝 | 28-lead SSOP (DB) |
| 腳位數 | 28 pins |
| 安裝類型 | Surface mount |
PCM1793DB 28-lead ssop (db) 腳位配置指南
PCM1793DB（28-lead 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： PCM1793DB.
請參閱 資料表 以查看完整腳位配置。
典型應用
PCM1793DB 適用於 6 應用s: High-Resolution Stereo DAC, Professional Audio Converter, CD and DVD Player Audio Path, Powered Speaker Front End, Headphone Amplifier Front End, Digital Audio System Board.
High-Resolution Stereo DAC
The PCM1793DB fits a high-resolution stereo conversion stage because it accepts 24-bit digital audio at sampling rates up to 192 kHz and provides 113 dB typical SNR with 0.001% typical THD+N. Its balanced voltage outputs can feed a balanced analog input directly when the channel polarity and signal levels are handled correctly. The complete design should preserve clock quality, provide a stable 4.5 V to 5.5 V supply, and reference the manufacturer datasheet for supported digital formats and output-network values.
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Professional Audio Converter
The PCM1793DB is appropriate for a professional stereo output stage requiring balanced voltage outputs and high-resolution conversion. Its typical 113 dB SNR and 0.001% THD+N establish a strong baseline for a converter, while the 192 kHz sampling capability supports high-rate digital audio sources. The downstream amplifier must accept the converter's balanced voltage outputs, and the board should use controlled ground partitioning so digital return currents do not add noise to the analog output stage.
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CD and DVD Player Audio Path
PCM1793DB can serve as the final stereo DAC in a CD or DVD player architecture when a system requires more than a basic consumer converter. The I2S interface supports connection to a digital audio transport, while the balanced voltage outputs feed a line-level amplifier or active output stage. Its 24-bit resolution, 192 kHz maximum sampling rate, and 113 dB typical SNR are useful for high-quality playback. Designers should still evaluate the source's actual sample-rate requirements and the jitter performance of the complete clock path.
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Powered Speaker Front End
The PCM1793DB is suitable for the digital-to-analog front end of a powered speaker when the system uses a balanced voltage-output signal chain. The 24-bit, 192 kHz converter provides ample source resolution, and its balanced outputs help maintain signal integrity over the internal analog route to the power amplifier. The implementation should account for the converter's 4.5 V to 5.5 V supply range, use local decoupling, and select an output network that preserves channel balance through the target cable and amplifier input.
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Headphone Amplifier Front End
PCM1793DB can precede a headphone amplifier when the design requires a high-resolution balanced digital source and a clean voltage-output stage. Its balanced outputs can preserve noise rejection through the analog routing, while the 113 dB typical SNR and 0.001% typical THD+N minimize converter-generated degradation before amplification. A practical design must include the appropriate postamplifier or output network, manage gain carefully, and keep the headphone return path separate from converter and switching-supply return currents.
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Digital Audio System Board
The PCM1793DB works well in a modular digital audio system that accepts I2S audio data and produces balanced analog stereo channels. Its 28-lead SSOP package supports compact board construction, and the converter's 4.5 V to 5.5 V operating range fits a conventional analog supply section. System integration requires stable clocking, defined channel polarity, correctly scaled output impedances, and a ground strategy that prevents high-current digital and switching paths from contaminating the balanced analog outputs.
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推薦產品摘要
工程參考資料，適用於 PCM1793DB — 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 |
|---|---|
| Package | 28-lead SSOP (DB) |
| Brand | Texas Instruments |
| Converter Type | Stereo audio digital-to-analog converter |
| Resolution | 24 bit |
| Maximum Sampling Rate | 192 kHz |
| Digital Audio Interface | I2S |
| Output Architecture | Balanced voltage output |
| Typical Signal-to-Noise Ratio | 113 dB |
| Typical THD+N | 0.001% |
| Supply Voltage Range | 4.5 V to 5.5 V |
主要差異化特點
- Balanced voltage-output architecture (對比PCM1794)
- High-resolution stereo conversion (對比PCM1716E)
- Advanced segment DAC implementation (對比Generic mono DAC implementations)
設計說明
Treat the PCM1793DB as a mixed-signal converter and keep the I2S, clock, and control routes away from the balanced analog outputs. Route analog and digital returns to their intended ground structures without allowing switching or high-current return paths to cross the converter's output region. Place the digital-interface components and their return-current paths on the side of the board opposite the postamplifier and output-network components.
Preserve the quality and timing of the I2S data, bit clock, and system clock because the PCM1793DB's advanced segment DAC architecture is intended to improve clock-jitter tolerance but cannot eliminate excessive timing noise. Keep clock traces short, use a controlled reference source, avoid unnecessary stubs, and match impedance according to the board's digital signal-integrity requirements. Validate the complete clock path with an oscilloscope or dedicated audio test equipment.
Design the analog supply around the documented 4.5 V to 5.5 V operating range and place local decoupling close to the supply pins. Use separate, low-impedance return paths for the converter and sensitive analog stages so switching-regulator ripple and output-current transients do not add noise to the balanced outputs. Confirm startup, voltage tolerance, and absolute maximum limits in the Texas Instruments PCM1793 datasheet.
Do not connect the balanced voltage outputs as though PCM1793DB were a differential-current-output converter. Its typical full-scale output is 2.1 V rms at the postamplifier, and the external network must preserve that voltage-output behavior. Verify channel polarity, balanced versus single-ended termination, output impedance, and downstream amplifier input configuration to prevent clipping, incorrect channel cancellation, or an unstable analog stage.
合規資訊
The verified manufacturer product and datasheet pages do not state the requested compliance classifications in their visible excerpts.
