PCM1772PW - 24-Bit Stereo Audio DAC | Texas Instruments
MPN： PCM1772PW ✓ 啟用中PCM1772PW 概覽
An audio DAC is a signal-conversion IC that transforms digital audio samples into continuous analog voltages suitable for amplification, headphone stages, mixer inputs, or line-level equipment. It belongs to the digital-to-analog converter category within broader data-conversion and signal-processing integrated circuits. Its digital interface connects to an audio codec or processor, while the line outputs connect to the next analog stage in the signal chain.
The PCM1772PW combines a 24-bit conversion resolution, a maximum 50 kSPS sampling rate, and 98 dB SNR in one low-power CMOS device. Software-controlled operation allows the host processor to manage supported device functions without a dedicated control microcontroller. Its stereo line-out architecture reduces the need for external output amplifiers in conventional line-level audio designs, although output loading, coupling, and headroom still require careful evaluation.
Texas Instruments describes the converter architecture as an enhanced multilevel design using noise shaping and multilevel amplitude quantization. These techniques are intended to improve dynamic performance and clock-jitter tolerance compared with a basic binary conversion approach. The PCM1772 and related PCM family devices are monolithic CMOS integrated circuits combining stereo DACs, line-out circuitry, and support functions in compact packages.
Typical uses include digital active speakers, compact audio appliances, consumer audio equipment, computer peripherals, and embedded audio systems that receive standard I2S streams. In these applications, the PCM1772PW can establish an analog line output close to the digital audio source, reducing system size while retaining a conventional stereo line-output interface. Its 24-bit resolution is also useful in designs where the host digital audio source provides higher-resolution samples.
The most important design check is the relationship between the digital audio source, clocking method, supported audio format, analog output loading, and power-supply arrangement. Use the pin-description table and recommended application circuit in the manufacturer datasheet when assigning tracks, selecting output components, and validating signal levels. Confirm whether the required I2S master or slave relationship and clock configuration match the surrounding codec or processor.
This product page consolidates the confirmed PCM1772PW capabilities, package information, sourcing workflow, and engineering guidance. It also distinguishes confirmed same-family alternatives from unsupported cross-package substitutions, helping engineers identify candidates while still requiring a final pin, timing, interface, and acoustic review before PCB release.
直接替換替代品，適用於 PCM1772PW — 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。
PCM1772PWR
✅ 直接替換📋 參考替代品（不在目錄中）
PCM1772PWG4
✅ 直接替換📋 參考替代品（不在目錄中）
PCM1773PW
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
PCM1771PW
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
PCM1770PW
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
PCM1772PW 最大額定值與電氣特性
| Product Type | Stereo audio digital-to-analog converter |
| Converter Resolution | 24 bit |
| Maximum Sampling Rate | 50 kSPS |
| Signal-to-Noise Ratio | 98 dB |
| Digital Audio Interface | I2S |
| Number of Audio Channels | 2 channels |
| 輸出類型 | Stereo line-out |
| Control Method | Software control |
| Integrated Output Circuitry | Line-out amplifier |
| Process Technology | CMOS |
| Architecture | Enhanced multilevel delta-sigma architecture with noise shaping and multilevel amplitude quantization |
| Clock Jitter Tolerance | Improved by enhanced multilevel architecture |
| 封裝 | 16-pin TSSOP (PW) |
| 安裝類型 | Surface mount |
PCM1772PW 16-pin tssop (pw) 腳位配置指南
PCM1772PW（16-pin tssop (pw) 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： PCM1772PW.
請參閱 資料表 以查看完整腳位配置。
典型應用
PCM1772PW 適用於 6 應用s: Compact Active Speakers, Digital Audio Appliances, Computer Audio Peripherals, Consumer Audio Equipment, Embedded Audio Systems, Network Audio and Media Hubs.
Compact Active Speakers
PCM1772PW fits digital active speakers that receive I2S audio from a codec, DSP, or network-audio processor and require a compact analog line output. Its 24-bit conversion resolution, operation up to 50 kSPS, and 98 dB SNR provide a suitable conversion stage for high-fidelity playback, while integrated stereo line-out circuitry can reduce the component count before the power amplifier. The converter should be placed close to the digital source to limit clock and signal-board-trace exposure. Validate output amplitude and load impedance against the downstream amplifier, and use the manufacturer application circuit for decoupling and analog grounding.
Digital Audio Appliances
PCM1772PW is suitable for digital audio appliances that combine an I2S source with analog line-level outputs. Its low-power CMOS stereo DAC supports 24-bit audio at rates up to 50 kSPS, while the integrated line-out stages simplify the transition from digital processing to an external amplifier or mixer. The 16-pin TSSOP package also supports compact board layouts when layout quality is managed carefully. In a multi-rail design, verify the device's supported supply range and sequencing requirements, maintain short return paths for analog signals, and preserve the clock relationships specified in the manufacturer datasheet.
Computer Audio Peripherals
PCM1772PW can serve as the digital-to-analog stage in a computer audio peripheral, docking product, or desktop audio accessory that accepts digital audio and exposes analog line outputs. The 98 dB SNR specification is appropriate for reducing converter-generated noise in a system dominated by low-level audio signals, while 24-bit resolution preserves the precision of high-resolution source material. Place the I2S interface and clock lines away from analog output routing when possible. Confirm source format, sample rate, master or slave operation, and output coupling values against the manufacturer's recommended circuit before layout release.
Consumer Audio Equipment
PCM1772PW is appropriate for consumer audio equipment requiring a low-power stereo DAC with integrated line-out drive. The device combines 24-bit conversion, up to 50 kSPS operation, 98 dB SNR, and I2S support in a 16-pin TSSOP package, enabling a direct connection between a digital audio engine and a line-input amplifier. Designers should budget adequate output headroom for the selected gain structure and verify that the line output can drive the intended impedance. Follow the manufacturer reference configuration for bypass capacitors, output coupling, grounding, and digital signal routing to preserve signal integrity.
Embedded Audio Systems
PCM1772PW fits embedded audio systems in which a processor or audio codec supplies I2S data and the product needs a conventional stereo analog output. Its 24-bit resolution supports detailed digital source material, and its 50 kSPS ceiling accommodates common audio-rate streams. The monolithic CMOS implementation integrates the converters, line-out circuitry, and support functions to simplify the analog chain. System integrators should confirm supply voltage, clock mode, and register behavior in the datasheet, and should keep the DAC clock and data routes short and referenced to a clean return path to reduce susceptibility to jitter and ground bounce.
Network Audio and Media Hubs
PCM1772PW is a practical converter for network-audio hubs, streaming adapters, and media-center boards that decode audio in a processor and need an analog line-level output. The 98 dB SNR specification helps preserve dynamic-range headroom, while the integrated stereo line-out stages provide a straightforward transition to an amplifier or mixer. Because network-audio products can contain several switching and high-speed digital domains, maintain a controlled ground and power strategy around the converter. Validate I2S timing against the source processor and use the manufacturer's recommended output and bypass networks to limit distortion and instability.
工程參考資料，適用於 PCM1772PW — 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 | PCM1772PWR | PCM1772PWG4 | PCM1773PW | PCM1771PW | PCM1770PW |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 16-pin TSSOP (PW) | 16-pin TSSOP (PW) | 16-pin TSSOP (PW) | 16-pin TSSOP (PW) | 16-pin TSSOP (PW) | 16-pin TSSOP (PW) |
主要差異化特點
- Exact PCM1772 ordering option (對比PCM1772PWR)
- I2S integration for digital audio sources (對比PCM1773PW)
- Integrated stereo line-out stage (對比PCM1771PW)
設計說明
Route the I2S data, bit clock, and system clock as short, continuous traces, and keep them away from the stereo line outputs. The PCM1772 datasheet identifies improved clock-jitter tolerance as an architectural benefit, but PCB delay and coupling can still degrade performance if digital activity crosses the analog section. Use a common ground plane, avoid splitting return paths beneath the converter, and place the device close to the digital audio source when practical.
Use the bypass and supply network shown in the Texas Instruments PCM1772 recommended application circuit. Place each decoupling capacitor adjacent to its intended supply pin, with a short ground connection and a low-impedance supply path to the converter. Because the device combines digital control circuitry and analog line outputs, supply ripple and ground bounce can affect the measured 98 dB SNR. Validate the design across line-rate, startup, and maximum-output operating conditions.
Confirm the master or slave clock relationship, I2S word alignment, bit-clock ratio, and supported sampling rate before releasing the layout. The 50 kSPS maximum rate describes conversion capability, but correct operation still depends on timing supplied by the codec, DSP, or processor. Review the manufacturer timing diagrams and register descriptions, and verify the interface using the worst-case clock arrangement expected in the finished product.
Do not assume that a 16-pin TSSOP footprint alone proves that every PCM177x-family device is interchangeable. Software-control behavior, pin multiplexing, supply requirements, and output settings may differ between family members. Use the pin-description table for the exact ordering option and compare it with the original schematic. Also check the assembly format because PCM1772PW and PCM1772PWR use different ordering suffixes associated with different shipment configurations.
合規資訊
The PCM1772 is an audio converter IC, but no specific RoHS, REACH, lead-free, halogen-free, or conflict-minerals status was identified in the product information used for this page.