PCM1725D - 16-Bit 96kHz Stereo DAC | Texas Instruments
MPN： PCM1725D ✓ 啟用中PCM1725D 概覽
An audio DAC is a converter that transforms digital PCM audio samples into continuous analog voltage signals suitable for headphone, speaker, mixer, or line-level amplification. The PCM1725D belongs to the broader digital-to-analog converter category, where the ADC/DAC hierarchy serves as the interface between digital signal processing and the analog audio domain. Its serial interface reduces the number of data connections required when connecting to an audio processor.
The primary characteristics are 16-bit resolution, 96kHz maximum sampling, I2S data transfer, and a 14-SOIC package. Supplier listings also describe the device as a complete stereo DAC with an integrated digital filter and output amplifier, eliminating the need to describe those functional blocks as separate external devices. These features support consumer and industrial audio systems requiring a conventional high-resolution serial DAC architecture.
Texas Instruments identifies the PCM1725 family as a 97dB-SNR stereo DAC, while one distributor datasheet listing states 95dB dynamic range. These figures describe different performance quantities and should not be treated as interchangeable measurements. The verified operating-temperature listing is -25°C to 85°C, and the package is identified as a 14-SOIC measuring 0.154 inch, or 3.90mm, in width.
Typical uses include digital audio playback, multimedia equipment, audio acquisition, active speaker systems, and external digital-to-analog conversion. In these systems, the PCM1725D accepts digital audio from an audio codec or processor and produces left and right analog outputs. A downstream amplifier is still required to drive speakers or headphones at useful output levels.
Designers should confirm the required digital-audio format, sample rate, supply arrangement, analog output implementation, and PCB land pattern from the manufacturer datasheet before layout. The 14-SOIC footprint and single-supply listing should be treated as the starting point for schematic capture, while detailed pin names, exposed conditions, and application-specific decoupling values require verification against the official documentation.
直接替換替代品，適用於 PCM1725D — 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PCM1725D 最大額定值與電氣特性
| Device Type | Stereo audio digital-to-analog converter (DAC) |
| 解析度 | 16 bit |
| Maximum Sampling Rate | 96 kHz |
| Signal-to-Noise Ratio | 97 dB |
| Dynamic Range | 95 dB |
| Digital Audio Interface | I2S serial interface |
| Channel Count | 3 channels, according to distributor listing |
| DAC Configuration | Stereo |
| Integrated Functions | Digital filter and output amplifier |
| Supply Type | Single supply |
| 工作溫度範圍 | -25°C to 85°C |
| 封裝 | 14-SOIC, 0.154 inch (3.90mm) wide |
| Terminal Count | 14 terminals |
| Lead Form | Gull wing |
| Package Shape | Rectangular |
| 安裝類型 | Surface mount |
PCM1725D rectangular 腳位配置指南
PCM1725D（rectangular 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： PCM1725D.
請參閱 資料表 以查看完整腳位配置。
典型應用
PCM1725D 適用於 6 應用s: Digital Audio Playback, Multimedia Audio Expansion, Headphone Amplifier Front End, Active Speaker Signal Source, Audio Data Acquisition, Industrial Audio Control Interface.
Digital Audio Playback
PCM1725D fits a digital playback chain where a processor or audio codec supplies 16-bit PCM data through I2S and the system requires left and right analog outputs. Its maximum sampling rate of 96kHz supports high-rate source material, while the 97dB SNR reported for the PCM1725 family provides a useful baseline for consumer and industrial playback. The integrated digital filter and output amplifier simplify the internal signal path. In practice, the designer still selects clocking, decoupling, output routing, and a downstream amplifier according to the official datasheet.
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Multimedia Audio Expansion
PCM1725D can provide a dedicated analog-audio output for multimedia equipment that already handles digital audio internally. Its I2S interface avoids a parallel data bus, and the 14-SOIC package supports a conventional surface-mount layout. The 16-bit, 96kHz-capable converter is appropriate when the product needs a stereo DAC path independent of a primary codec. The main design consideration is ensuring that the source device supplies compatible clocks, channel ordering, word length, and voltage levels before adding the converter and its downstream headphone amplifier.
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Headphone Amplifier Front End
PCM1725D is suitable for the converter stage preceding a stereo headphone amplifier because it supplies left and right analog signals from an I2S source. The verified 14-SOIC package is small enough for compact audio products, while 96kHz maximum sampling and 16-bit resolution support conventional high-resolution audio streams. Its integrated output amplifier reduces the number of separate functional blocks described for the DAC, but designers should not assume that it directly supports typical low-impedance headphones. A suitable headphone driver must be added based on load, voltage, and current requirements.
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Active Speaker Signal Source
PCM1725D can provide the stereo analog source for an active-speaker system when the loudspeaker electronics require line-level audio rather than speaker-level power. Its 16-bit I2S input and 96kHz maximum sampling rate accommodate digital audio delivered from a host processor, network client, or audio interface. The converter's documented 97dB family SNR is relevant when preserving low-level program information, although system noise also depends on the power supply, analog routing, and power amplifier. Add a dedicated speaker amplifier and verify the output level expected by that stage.
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Audio Data Acquisition
PCM1725D is applicable in audio acquisition equipment that receives digital audio from a sensor interface, DSP, or codec and requires analog monitoring outputs. Its stereo architecture supports simultaneous left and right channels, while the 96kHz ceiling accommodates the common 48kHz operating mode with additional format capability. The I2S connection keeps the digital routing compact, and the integrated filter and output-amplifier functions support a self-contained DAC section. A balanced instrumentation stage, anti-alias requirements, grounding strategy, and clock-source arrangement must still be established for the complete acquisition path.
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Industrial Audio Control Interface
PCM1725D can serve as the stereo audio output converter in industrial control, monitoring, or communications equipment that accepts digital audio from a dedicated processor. The 14-SOIC surface-mount package and I2S interface fit embedded audio subsystems, while the single-supply listing provides an initial constraint for system power planning. Industrial designs must pay particular attention to ground partitioning, supply noise, startup behavior, and the timing relationship between the digital source and converter clocks. The 16-bit, 96kHz capability supports the DAC function, but final EMC and environmental requirements remain system-level concerns.
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推薦產品摘要
工程參考資料，適用於 PCM1725D — 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 |
|---|---|
| Brand | Texas Instruments |
| Package | 14-SOIC, 0.154 inch (3.90mm) wide |
| Resolution | 16 bit |
| Maximum Sampling Rate | 96 kHz |
| Signal-to-Noise Ratio | 97 dB |
| Dynamic Range | 95 dB |
| Digital Audio Interface | I2S serial interface |
| DAC Configuration | Stereo |
| Supply Type | Single supply |
| Operating Temperature Range | -25°C to 85°C |
主要差異化特點
- Complete integrated stereo DAC signal chain (對比Generic discrete stereo DAC implementation)
- High-resolution serial conversion capability (對比Lower-resolution legacy audio DAC)
- Documented SNR suitable for quality audio conversion (對比Entry-level stereo DAC)
- Compact I2S-based implementation (對比Parallel-interface audio DAC)
設計說明
Begin the PCB layout with the verified 14-SOIC footprint and verify every signal and power terminal against the official manufacturer pinout before routing. Keep the digital I2S clock, serial data, and control traces away from the analog outputs and any downstream high-gain headphone or speaker amplifier. A solid ground plane and a short analog output path help control return currents. Because the supplied snippets do not expose complete pin names or exposed-pad details, the land pattern must not be finalized from distributor package dimensions alone.
Plan the PCM1725D supply path as a single-supply system only after checking the exact operating limits in the official datasheet. Place the required bypass capacitors at the device power terminals, keep their loop area small, and route supply current away from sensitive analog output paths. The available listing identifies the device as single-supply but does not provide the permitted supply range, capacitor values, startup limits, or power-consumption figures, so those values must not be assumed from generic audio-DAC designs.
Do not treat the 97dB SNR and 95dB dynamic-range figures as interchangeable ratings, and do not infer that the integrated output amplifier can directly drive low-impedance headphones. Confirm the required I2S clocking, data alignment, word length, and channel format with the source processor. Also verify output loading and external analog-network requirements in the manufacturer datasheet. These checks prevent common failures involving invalid audio framing, incorrect channel mapping, excessive distortion, or an overloaded DAC output.
合規資訊
The supplied verified data does not state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals compliance. These fields remain unknown rather than being inferred from the manufacturer's general corporate policies.
