PCM1742E/2K - 24-Bit 192 kHz Stereo Audio DAC | Texas Instruments
MPN： PCM1742E/2K ✓ 啟用中PCM1742E/2K 概覽
An audio digital-to-analog converter, or DAC, translates digital audio samples into an analog voltage that can drive amplifiers, mixers, headphones, or line-level equipment. The PCM1742 belongs to the broader DAC -> audio converter -> signal-conversion IC -> semiconductor hierarchy. It is intended for applications requiring higher resolution and sampling capability than conventional CD-audio converters while retaining a simple, low-power CMOS implementation.
The PCM1742E/2K provides 24-bit resolution and supports sampling rates up to 192 kHz. Its enhanced multilevel delta-sigma conversion architecture uses fourth-order noise shaping and 8-level amplitude quantization. Programmable gain and digital filtering give the system designer control over signal scaling and the conversion-characteristics filtering path. The PCM1742E version is specified for 100 dB typical dynamic range and SNR under the stated +5 V analog-supply condition.
Digital timing is an important architectural consideration because the converter’s performance depends on a stable master clock and correctly synchronized serial data, clock, and latch signals. The I2S-compatible interface supports integration into digital audio equipment, while the internal digital filtering shapes quantization noise and reduces the need for extensive external analog reconstruction filtering.
Typical uses include professional audio equipment, digital mixers, sound-card and USB-audio subsystems, high-resolution playback platforms, multichannel audio appliances, and test or measurement systems requiring balanced resolution and sampling performance. The converter is also appropriate when a compact SSOP-16 implementation is preferable to a large discrete DAC architecture.
Designers should pay particular attention to analog and digital supply decoupling, the master-clock source, interface voltage compatibility, and the output filtering or amplifier interface. The analog output network must be designed around the converter’s output characteristics and intended load. PCB signal placement should keep clock and data traces short, while ground and supply returns should follow the layout guidance in the manufacturer datasheet.
This product page combines manufacturer specifications, package information, pin-compatible family options, and practical implementation considerations. It also distinguishes electrically meaningful alternatives from ordinary ordering or packing variations so engineers can assess replacement options before changing an audio-board design.
直接替換替代品，適用於 PCM1742E/2K — 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： PCM1742E/2K （相同外形與佔位） — 差異在於 Amplitude Quantization, Digital Audio Interface, Noise-Shaping Order, Package, Maximum Sampling Rate.
PCM1742E
✅ 直接替換聯絡詢價
查看資料表 →PCM1742KE
✅ 直接替換聯絡詢價
查看資料表 →PCM1742KE/2K
✅ 直接替換📋 參考替代品（不在目錄中）
PCM1742E/2K 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-compatible |
| Architecture | Enhanced multilevel delta-sigma |
| Noise-Shaping Order | Fourth order |
| Amplitude Quantization | 8 levels |
| PCM1742E Dynamic Range | 100 dB typical at VCC = +5 V |
| PCM1742E Signal-to-Noise Ratio | 100 dB typical at VCC = +5 V |
| PCM1742KE Dynamic Range | 106 dB typical at VCC = +5 V |
| PCM1742KE Signal-to-Noise Ratio | 106 dB typical at VCC = +5 V |
| Gain | Programmable |
| Digital Filtering | Programmable |
| Full-Scale Dither | Off |
| High-Pass Filter Mode | 22 Hz |
| 封裝 | SSOP-16 |
| 安裝類型 | Surface mount |
PCM1742E/2K ssop-16 腳位配置指南
PCM1742E/2K（ssop-16 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： PCM1742E/2K.
請參閱 資料表 以查看完整腳位配置。
典型應用
PCM1742E/2K 適用於 6 應用s: Professional Audio Playback, USB Audio Interface, Digital Audio Mixer, High-Resolution Audio Equipment, Multichannel Audio Appliance, Audio Measurement and Test Equipment.
Professional Audio Playback
PCM1742E/2K fits professional playback channels that require 24-bit conversion and sampling rates up to 192 kHz. Its 100 dB typical dynamic range and SNR at a +5 V analog supply provide a useful starting point for line-output stages, while programmable gain and digital filtering help align the converter with the downstream mixer or amplifier. The device uses fourth-order noise shaping and 8-level amplitude quantization to improve in-band noise behavior. Place the converter’s analog-output path and decoupling network according to the manufacturer application circuit, and validate the master-clock and digital-interface timing at every supported sampling rate.
推薦
USB Audio Interface
The PCM1742E/2K is suitable for a USB-audio interface whose digital controller supplies an I2S-compatible stream and stable master clock. Its 24-bit resolution supports high-resolution playback, and the 192 kHz maximum sampling rate permits use with high-rate source material. The 100 dB typical SNR and dynamic range are appropriate for a compact interface whose analog output drives an op-amp or line-driver stage. Care should be taken to isolate clock and data routing from the stereo output path, while the digital ground and supply-return plan follows the PCM1742 reference layout.
推薦
Digital Audio Mixer
A digital mixer can use PCM1742E/2K for stereo monitoring or line-level output conversion when it needs a compact 24-bit DAC. Programmable gain provides scaling flexibility between digital source levels and mixer output ranges, while digital filtering shapes the conversion spectrum. The converter’s 100 dB typical SNR and dynamic range help preserve program material when the mixer’s own conversion and output stages are not the dominant noise sources. Engineers should test output loading, clock synchronization, channel start-up timing, and the interaction between digital filtering and the system antialiasing requirements.
推薦
High-Resolution Audio Equipment
PCM1742E/2K suits high-resolution audio equipment where 24-bit data and sampling rates above 96 kHz are useful. Its enhanced multilevel delta-sigma architecture uses fourth-order noise shaping and 8-level amplitude quantization, supporting excellent dynamic performance without a large external converter assembly. The 100 dB typical SNR provides a clear conversion target for quality-conscious playback equipment. A KE-version choice can raise the typical SNR to 106 dB when the analog output stage has sufficient headroom and the additional 6 dB translates into a measurable system benefit.
推薦
Multichannel Audio Appliance
For a multichannel playback appliance, multiple PCM1742E/2K converters can provide independent stereo conversion channels with a consistent digital architecture. Each channel benefits from 24-bit resolution, up to 192 kHz sampling, and identical noise-shaping behavior, simplifying calibration and software configuration. The SSOP-16 package also supports compact routing between the digital controller and analog output circuitry. Synchronize device clocks carefully across channels, maintain consistent supply filtering, and reserve routing space for analog outputs to avoid channel-to-channel crosstalk introduced by the PCB rather than the converter itself.
推薦
Audio Measurement and Test Equipment
PCM1742E/2K can be evaluated for audio test and measurement systems that require controlled digital-to-analog conversion across multiple sampling rates. Its known 24-bit, 192 kHz-capable architecture and 100 dB typical SNR provide defined starting points for stimulus generation. The I2S-compatible interface simplifies connection to a digital source or FPGA-based test engine. For accurate results, keep test-clock sources low in jitter, verify digital-filter settings for each signal bandwidth, and characterize the complete analog output path rather than attributing downstream amplifier or load effects to the converter.
推薦
推薦產品摘要
工程參考資料，適用於 PCM1742E/2K — 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 | PCM1742E | PCM1742KE | PCM1742KE/2K | PCM1748E | PCM1748KE |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | SSOP-16 | SSOP-16 - same | SSOP-16 - same | SSOP-16 - same | SSOP-16 - same | SSOP-16 - same |
主要差異化特點
- Higher conversion performance in the closely related KE option (對比PCM1742KE/2K)
- Direct functional-equivalent family option (對比PCM1742E)
- Common higher-order delta-sigma conversion architecture (對比PCM1748E)
設計說明
Place the required input, output, and bypass capacitors directly beside their associated PCM1742E/2K pins, using the exact values and tolerances defined by the manufacturer application circuit. Keep the analog output traces short and away from the master-clock and serial-data routes. Preserve a continuous ground reference under and around the SSOP-16 device, and avoid switching or digital-current paths beneath the analog output network.
Treat the master clock as a high-quality signal. Route it over a continuous reference plane, minimize stubs and test-point discontinuities, and confirm that the selected clock source meets the PCM1742E/2K timing and frequency requirements at every operating mode. Clock phase relationships must also be checked when the converter is synchronized with additional channels, since consistent sampling timing is essential for avoiding channel skew.
Do not assume that all PCM174x-family parts are register-compatible despite sharing the SSOP-16 format. Before replacing PCM1742E/2K with PCM1748E or PCM1748KE, compare master-clock requirements, supported sampling rates, digital-filter behavior, gain-control options, power-up configuration, and analog-output connections. The close family relationship helps reduce conversion risk, but software and hardware timing must still be revalidated.
合規資訊
The accessible product information does not state the specific material-compliance status for PCM1742E/2K. AEC-Q100 is not applicable because this is an audio converter IC rather than an automotive-qualified device.