PCM1742E - 24-Bit Stereo Audio DAC | Texas Instruments
料号： PCM1742E ✓ 量产中PCM1742E 概述
An audio DAC is a mixed-signal semiconductor that converts digital audio samples into continuous analog voltage signals suitable for amplifiers, speakers, headphones, or audio-capture equipment. The PCM1742E belongs to the broader DAC, data-converter, and signal-processing IC hierarchy. Its stereo topology integrates two converter channels and associated support circuitry, reducing the component count required for a conventional two-channel audio output stage.
Key features include 24-bit conversion, 200 kHz sampling support as listed by DigiKey, 192 kHz sampling support in the linked datasheet description, fourth-order noise shaping, and 8-level amplitude quantization. The I2S interface supports connection to digital audio processors, while the 16-pin SSOP package provides a compact surface-mount option. The listed operating temperature is -25°C to 85°C.
The enhanced multilevel delta-sigma architecture is central to the PCM1742E's performance. Noise shaping moves quantization noise away from the most perceptually important audio band, while multilevel quantization reduces the demands placed on the internal digital-to-analog conversion process. These techniques support improved dynamic performance and tolerance to clock and implementation variation compared with simpler first-order delta-sigma converters.
Typical uses include consumer and professional digital audio equipment, powered speakers, audio network endpoints, test and measurement equipment, and embedded systems that require a stereo I2S-to-analog conversion stage. The device is also suitable for prototypes that need a compact two-channel DAC without a separate external converter for each output.
Designers should provide suitable analog and digital supply decoupling, connect the I2S clock and data signals correctly, and account for output filtering when evaluating the analog signal path. The available verified data does not include a complete pin table, recommended external component values, or a verified unit price, so those details require confirmation in the manufacturer datasheet before layout and sourcing decisions.
This page combines verified manufacturer and distributor specifications, verified-source limitations, package information, pricing availability, and replacement guidance with practical application and design notes. It distinguishes documented drop-in-family options from parts that may require board-level changes, helping engineers evaluate the PCM1742E without treating generic cross-reference results as guaranteed pin compatibility.
直接替换替代料： PCM1742E ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
PCM1742KEG4
✅ 直接替换📋 参考替代料（不在目录中）
PCM1742EG4
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
PCM1742U
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
PCM1742E 最大额定值与电气特性
| Device Type | Stereo audio digital-to-analog converter (DAC) |
| 分辨率 | 24 bit |
| Maximum Sampling Rate | 200 kHz |
| Datasheet Sampling Rate | 192 kHz |
| Channel Count | 2 channels |
| Digital Audio Interface | I2S |
| Converter Architecture | Enhanced multilevel delta-sigma |
| Noise-Shaping Order | Fourth order |
| Amplitude Quantization | 8-level |
| Process Technology | CMOS |
| 封装 | SSOP-16 |
| Package Code | SSOP |
| Package Height | 1.75 mm |
| Terminal Count | 16 |
| 安装类型 | Surface mount |
| 工作温度 | -25°C to 85°C |
| Dither | Off |
| High-Pass Filter | 22 Hz |
| Low-Pass Filter | 22 kHz |
PCM1742E 1.75 mm 引脚配置指南
PCM1742E（1.75 mm 封装）的引脚配置。 该模拟元件具有输入、输出和电源引脚。请参阅制造商数据手册以了解失调调零、补偿和使能引脚配置。适用于信号调理和放大器电路。
暂无详细引脚数据： PCM1742E.
请参阅 数据手册 以查看完整引脚配置。
典型应用
PCM1742E 适用于 6 应用s: Powered Speaker Audio Output, Network Audio Endpoint, Digital Audio Recording and Playback, Test and Measurement Audio Source, Consumer Audio System, Industrial Audio Control and Monitoring.
Powered Speaker Audio Output
PCM1742E fits a two-channel powered-speaker output stage because it combines stereo 24-bit DACs, an I2S input, and support circuitry in one SSOP-16 package. The verified listing supports sampling rates up to 200 kHz, allowing the converter to preserve source-rate flexibility in a compact audio product. It is placed between the digital audio processor and the analog power-amplifier stage, where its differential or single-ended outputs feed the downstream amplifier according to the manufacturer application circuit. Compared with using two separate converter ICs, the integrated stereo device reduces board area and simplifies digital routing. Engineers should still verify the exact output topology, recommended reconstruction filter, analog and digital supply sequencing, and output load requirements in the official datasheet before finalizing the PCB.
推荐
Network Audio Endpoint
PCM1742E is appropriate for a network-audio endpoint that receives encoded or decoded digital streams and ultimately requires stereo analog output. Its I2S interface provides a conventional digital-audio connection, while the two integrated channels support balanced left and right signal paths from a common source. The 24-bit conversion and support for up to 200 kHz sampling are useful for products designed to preserve high-resolution source material. In implementation, the network processor supplies clock, serial data, and word-select signals to the PCM1742E, while the analog section feeds a line-level or headphone amplifier. Layout should isolate the digital interface from the analog outputs and follow verified bypass and output-filter recommendations. The exact codec and topology must be checked in the manufacturer datasheet.
推荐
Digital Audio Recording and Playback
PCM1742E can serve as the playback-side converter in a digital audio recording, monitoring, or workstation product. The stereo architecture maps directly to standard left and right playback channels, and the I2S format allows connection to audio engines, USB interface controllers, or digital recording platforms. Its verified 24-bit resolution and sampling-rate capability make it useful where the design must convert high-rate digital streams to analog monitoring outputs. The converter should be placed close to the analog output stage so that the I2S traces remain short and the analog path receives clean, stable supply rails. Designers must confirm whether the system requires full-scale output adjustment, mute behavior, or a specific digital audio format. The available evidence does not include the complete control-pin table, so those functions require datasheet verification.
推荐
Test and Measurement Audio Source
PCM1742E is usable in audio test and measurement equipment that converts stored or generated digital waveforms into analog test signals. Its two-channel 24-bit topology supports dual-channel test outputs, while its I2S interface allows connection to FPGA, DSP, or embedded-controller test sources. The verified listing identifies sampling support up to 200 kHz, which can suit laboratory systems that need more than the conventional 48 kHz audio rate. Analog output filtering, gain calibration, and output-impedance requirements depend on the intended measurement bandwidth and load. Because the supplied source data does not state calibration accuracy, output range, or distortion figures, those characteristics must be extracted from the official datasheet before specifying the instrument error budget.
推荐
Consumer Audio System
PCM1742E is suitable for compact consumer-audio systems that receive digital audio over I2S and need two analog output channels. A soundbar, active bookshelf speaker, digital amplifier controller, or premium media peripheral can use the converter to avoid separate single-channel DAC packages. The integrated stereo support circuitry reduces the number of active components in the signal chain, while 24-bit conversion and up-to-200-kHz sampling provide a useful format ceiling for high-resolution sources. Practical implementation requires separate analog and digital supply planning, local bypassing, controlled clocking, and an analog reconstruction or anti-imaging filter. The verified data does not specify headphone-drive capability, so the device should not be assumed to directly drive low-ohm headphones; use an appropriate amplifier after the analog outputs.
推荐
Industrial Audio Control and Monitoring
PCM1742E can support industrial audio-control or monitoring equipment that accepts digital audio from an embedded processor and produces analog outputs for operators, speakers, or downstream amplifiers. Its SSOP-16 package helps maintain a compact control panel or embedded controller footprint, while the I2S interface provides a straightforward connection to digital signal-processing hardware. The verified operating-temperature range of -25°C to 85°C covers many commercial and industrial environments, although it does not by itself establish full industrial qualification. System-level EMC, surge, and environmental requirements remain separate from the DAC specifications. Designers should verify clock jitter tolerance, analog output behavior, and power sequencing in the manufacturer documentation. For safety-critical monitoring, retain a secondary monitoring path so an analog output fault cannot go unnoticed.
推荐
推荐产品汇总
工程参考数据： PCM1742E ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | PCM1742KEG4 | PCM1742EG4 | PCM1742U |
|---|---|---|---|---|
| Package | SSOP-16 | SSOP-16 | SSOP-16 | SSOP-16 |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Device Type | Stereo audio DAC | Stereo audio DAC | Stereo audio DAC | Stereo audio DAC |
| Converter Resolution | 24 bit | 24 bit | 24 bit | 24 bit |
| Digital Audio Interface | I2S | I2S | I2S | I2S |
| Converter Architecture | Enhanced multilevel delta-sigma | Enhanced multilevel delta-sigma | Enhanced multilevel delta-sigma | Enhanced multilevel delta-sigma |
| Noise Shaping | Fourth order | Fourth order | Fourth order | Fourth order |
| Amplitude Quantization | 8-level | 8-level | 8-level | 8-level |
| Orderable Suffix | E | KEG4 | EG4 | U |
关键差异点
- Integrated stereo conversion in a compact package （对比 PCM1742KEG4)
- Clear distinction from a dual-supply replacement （对比 PCM1753)
- Documented high-rate format support （对比 PCM1681PWPR)
设计说明
Place the PCM1742E close to the digital audio source and analog output circuitry, then keep the I2S clock, data, and word-select routes short and away from the analog outputs. Follow the manufacturer layout example when selecting component placement. Because the supplied verified results do not include the full pin table or recommended external-component values, do not infer bypass capacitance, output filters, or clock-routing details from generic DAC layouts; confirm them against the official datasheet.
The verified TI E2E comparison identifies PCM1742E as using 5 V analog and 3.3 V digital supplies. Provide local, low-impedance decoupling for each supply domain and keep switching-regulator and digital-clock return currents away from the converter's analog ground path. The retrieved data does not provide current consumption, quiescent current, or allowable supply sequencing, so power-rail capacity and startup order must be verified in the manufacturer datasheet before production release.
Do not treat a same-package audio DAC as automatically interchangeable. The Texas Instruments E2E result specifically states that PCM1753 differs at pin 5 and uses a 5 V single supply, even though it is otherwise described as pin compatible with several PCM family devices. For every proposed substitute, verify every pin, power domain, digital timing mode, maximum sample rate, output topology, and analog filter connection before calling it a drop-in replacement.
Treat the I2S interface as a clocked digital signal and use short, continuous clock routing with a defined return path. Avoid routing serial data beneath the analog output or supply-divider regions, and keep connector or board-switch noise sources away from the converter. The verified material confirms the I2S interface and up-to-200-kHz sampling support but does not specify input capacitance or timing margins, so signal-integrity closure requires the official electrical-characteristics tables and layout guidance.
合规信息
The supplied verified sources do not explicitly state material-compliance or automotive-qualification status for PCM1742E. AEC-Q100 is recorded as not applicable because this exact MPN was not identified as an automotive-qualified ordering option. Confirm compliance using the current Texas Instruments product documentation and exact-orderable-part declarations.
