PCM1789PWR - 24-Bit 192kHz Stereo DAC | Texas Instruments
MPN： PCM1789PWR ✓ 啟用中PCM1789PWR 概覽
An audio digital-to-analog converter, or audio DAC, converts digital PCM samples into analog voltage signals suitable for headphone, line-level, or power-amplifier inputs. Within the signal-chain hierarchy, the PCM1789 is an audio DAC, a data-converter IC, and a signal-conversion device used between a digital audio source and an analog output stage. Differential outputs can support balanced analog connections while reducing sensitivity to ground-borne noise.
Key features include software-programmable digital attenuation, soft mute, de-emphasis, and user-programmable hardware control functions. The control architecture supports three-wire SPI-compatible and two-wire I2C-compatible serial interfaces, while the audio data interface supports I2S-format operation. These features allow the converter to be configured for attenuation levels, mute behavior, and system operating modes without requiring a separate external control controller for every adjustment.
The enhanced multi-level delta-sigma modulator is designed for high-resolution playback while supporting a broad range of sample rates. Differential analog outputs provide two audio channels, and the available interface options make the device suitable for systems using either serial control buses or discrete hardware-control lines. The reported 113 dB SNR makes the PCM1789 relevant to high-fidelity audio equipment where dynamic-range margin is important.
Typical applications include premium CD and DVD player audio paths, digital broadcast receivers, professional audio mixers, sampling-rate converters, home-theater receivers, and high-end portable audio equipment. Its 192 kHz capability also supports high-resolution source material, although system clocking and output reconstruction must be designed to preserve the converter's full performance.
For PCB design, keep the analog output routing short, place decoupling capacitors near the supply pins, and follow the manufacturer pin-description table when assigning connector and control-signal routing. Differential outputs should be routed with matched geometry where practical, and the exposed digital signals should remain separated from sensitive analog output paths to minimize crosstalk.
直接替換替代品，適用於 PCM1789PWR — 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。
PCM1788
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
PCM1787
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
PCM1786
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
PCM1784
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
PCM1782
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
PCM1789PWR 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 |
| Minimum Sampling Rate | 8 kHz |
| Supported Input Word Lengths | 16 bit, 20 bit, 24 bit, 32 bit |
| 輸出配置 | 2 channels, differential outputs |
| Signal-to-Noise Ratio | 113 dB |
| DAC Architecture | Enhanced multi-level delta-sigma modulator |
| Audio Interface | I2S |
| Control Interface | Three-wire SPI-compatible or two-wire I2C-compatible serial control |
| Hardware Control | Two user-programmable control pins |
| Digital Attenuation | Programmable |
| Soft Mute | Programmable |
| De-emphasis | Programmable |
| 供應電流 | 22.0 mA |
| 封裝 | 24-pin TSSOP (PW) |
| 安裝類型 | Surface mount |
| RoHS 狀態 | Compliant |
| Moisture Sensitivity Level | MSL 2, 260 C, 1 year |
PCM1789PWR 24-pin tssop (pw) 腳位配置指南
PCM1789PWR（24-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： PCM1789PWR.
請參閱 資料表 以查看完整腳位配置。
典型應用
PCM1789PWR 適用於 6 應用s: High-Resolution CD and DVD Player Audio Path, Professional Digital Mixer Audio Channel, Digital Broadcast and Network Audio Receiver, Home-Theater and AV Receiver DAC, Sampling-Rate Converter and Digital Audio Processor, High-End Portable and Personal Audio.
High-Resolution CD and DVD Player Audio Path
The PCM1789PWR fits a high-resolution player output stage because it converts 24-bit PCM audio at rates up to 192 kHz while providing two differential analog channels. Its 113 dB SNR rating leaves useful dynamic-range margin for the DAC, reconstruction filter, and following output amplifier. Place the converter close to the output filter and analog power regulator, then route the differential outputs without crossing digital clock or serial-data traces. The programmable attenuation and soft-mute functions also allow a system controller to implement channel trimming and quiet transitions without external relay circuits.
推薦
Professional Digital Mixer Audio Channel
A digital mixer can use the PCM1789PWR to convert two mixer buses into analog line outputs for external monitoring, processing, or recording. Its differential outputs suit balanced analog routing and help reduce ground-current sensitivity, while the 24-bit conversion and 192 kHz sampling capability cover high-resolution multichannel workflows. Use hardware-control mode for fast mute or level functions when the mixer has limited control bandwidth, or use the serial control interface for software-managed attenuation. Keep clock traces away from the analog outputs and use a dedicated low-noise analog supply section.
推薦
Digital Broadcast and Network Audio Receiver
The PCM1789PWR is appropriate for broadcast receivers and network-audio products that need a stereo analog line output after a digital decoding stage. Its I2S input accepts 16-, 20-, 24-, or 32-bit words, and the 8 kHz-to-192 kHz range covers standard broadcast rates as well as high-resolution streams. Differential outputs reduce sensitivity to common-impedance ground noise in chassis-based equipment. Software control provides programmable attenuation, soft mute, and de-emphasis, while the two hardware-control pins can implement direct mute or user-defined functions.
推薦
Home-Theater and AV Receiver DAC
The PCM1789PWR can provide the final stereo conversion stage in a home-theater receiver, game-console audio accessory, or television soundbar. Its 113 dB SNR supports low-noise playback from digital sources, and the 192 kHz maximum rate accommodates high-resolution content when the upstream source and clock architecture support it. Differential outputs pair well with balanced preamplifier inputs, while unbalancing can be performed downstream if required. Programmable soft mute and attenuation help prevent transients during source changes and volume transitions.
推薦
Sampling-Rate Converter and Digital Audio Processor
In a sampling-rate conversion or digital audio processing chassis, the PCM1789PWR serves as the stereo analog output converter after digital routing and gain processing. Differential analog outputs help maintain signal integrity over longer internal cable runs when paired with a balanced receiver. The converter's programmable attenuation and hardware-control pins provide both fine-grained software adjustment and fast system-level control. Clocking remains the dominant integration issue, so the system must supply the required master and slave clocks and ensure that the audio interface format matches the upstream processor.
推薦
High-End Portable and Personal Audio
The PCM1789PWR is suitable for high-end portable and personal-audio products when differential outputs, programmable attenuation, and a compact surface-mount implementation are important. The 24-pin TSSOP package allows a compact layout, while differential outputs can feed a balanced headphone stage or a precision line driver. Low-noise analog supply design is essential because converter performance can be limited by regulator and decoupling noise. Keep the digital interface isolated from the analog output path and use the soft-mute function for click-free mode or connection transitions.
推薦
推薦產品摘要
工程參考資料，適用於 PCM1789PWR — 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 | 24-pin TSSOP (PW) |
| Brand | Texas Instruments |
| Converter Type | Stereo audio DAC with differential outputs |
| Resolution | 24 bit |
| Maximum Sampling Rate | 192 kHz |
| Minimum Sampling Rate | 8 kHz |
| Supported Input Word Lengths | 16 bit, 20 bit, 24 bit, 32 bit |
| Signal-to-Noise Ratio | 113 dB |
| Audio Interface | I2S |
| Control Interface | SPI-compatible or I2C-compatible serial control |
| Supply Current | 22.0 mA |
| RoHS Status | Compliant |
主要差異化特點
- Supports high-resolution stereo conversion with differential outputs (對比PCM1794)
- Combines serial control with programmable hardware-control pins (對比PCM1795)
- Accepts four digital input-word lengths (對比PCM1798)
設計說明
Separate the analog output region from digital clock, serial-data, and control traces. Route the two differential outputs as short matched pairs where practical, place reconstruction or output filtering close to the converter, and avoid sharing narrow ground paths between output return currents and switching circuitry. This layout strategy limits crosstalk and helps preserve the PCM1789's 113 dB SNR capability.
Use separate, low-impedance supply and ground connections for the analog and digital sections, and place local decoupling capacitors at the supply pins according to the manufacturer layout. The reported supply current is 22.0 mA, but actual converter dissipation depends on the operating voltage and output state. Validate the analog rail for noise and start-up sequencing before evaluating output SNR.
Do not assign PCB nets from a similar stereo DAC without checking the manufacturer pin-description table. The audio-data pins, control pins, analog outputs, and supply pins must match the PCM1789PWR exactly. Also verify master-clock and slave-clock requirements, the supported I2S format, and the output filtering values before power-up, since incorrect clocking can invalidate otherwise correct analog measurements.
合規資訊
RoHS compliance and an MSL 2, 260 C, 1-year moisture sensitivity classification are reported for PCM1789PWR. Other compliance attributes were not stated in the product information.
