PCM1770PW - 24-Bit Stereo DAC with HP Amplifier | TI
料号： PCM1770PW ✓ 量产中PCM1770PW 概述
A digital-to-analog converter, or DAC, converts digital audio samples into proportional analog voltages. In a stereo implementation, two converters reconstruct left and right channels from an I2S source. The PCM1770PW combines that conversion function with headphone-driver circuitry and support logic, reducing the number of discrete components required in portable audio equipment while retaining a compact surface-mount footprint.
The converter uses TI’s enhanced multilevel architecture, which applies noise shaping and multilevel amplitude quantization. These techniques support efficient low-voltage operation and improved dynamic performance. The integrated headphone amplifier includes software control, allowing the host processor to adjust the relevant operating mode without relying on a separate analog control interface.
PCM1770PW is identified as a 24-bit DAC rated for 50 kSPS operation. Its CMOS monolithic construction supports low-power audio signal chains, while the 1.6 V to 3.6 V operating range fits battery-powered and portable systems. The device accepts 3-wire I2S serial audio data, making it suitable for systems whose digital audio source already uses that interface.
Typical applications include portable digital audio players, headphone-equipped personal audio products, compact consumer audio equipment, and embedded systems requiring a stereo conversion stage with a local headphone output. Integrating the DAC and headphone amplifier supports a shorter analog signal path while reducing board area compared with separate conversion and amplification stages.
Circuit design should account for the low supply voltage and analog-output implementation required by the manufacturer datasheet. Decoupling, output loading, digital-interface timing, and headphone-output stability determine practical performance. Before production release, use the pin-description table and recommended application circuit in the manufacturer documentation to assign PCB tracks and select external components.
This product record combines the manufacturer’s architecture and device specifications with application guidance, package information, engineering design notes, and a side-by-side comparison. These resources help engineers assess the PCM1770PW for compact stereo audio designs while separately confirming electrical limits and pin-level implementation details.
直接替换替代料： PCM1770PW ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： PCM1770PW （相同外形与封装尺寸） ——差异在于 Package, Product Type.
PCM1770PW 最大额定值与电气特性
| Product Type | Stereo digital-to-analog converter with headphone amplifier |
| Converter Resolution | 24 bit |
| Maximum Sample Rate | 50 kSPS |
| Audio Interface | 3-wire I2S serial interface |
| Channel Configuration | 2-channel stereo |
| Signal-to-Noise Ratio | 98 dB |
| Supply Voltage Range | 1.6 V to 3.6 V |
| Headphone Amplifier | Integrated, with software control |
| Converter Architecture | Enhanced multilevel architecture |
| Noise-Shaping Technology | Integrated noise shaping |
| Amplitude Quantization | Multilevel amplitude quantization |
| Integrated Circuit Technology | CMOS monolithic |
| Power Class | Low-power |
| 封装 | TSSOP-16 (PW) |
| 引脚数量 | 16 pins |
| 安装类型 | Surface mount |
PCM1770PW tssop-16 (pw) 引脚配置指南
PCM1770PW（tssop-16 (pw) 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： PCM1770PW.
请参阅 数据手册 以查看完整引脚配置。
典型应用
PCM1770PW 适用于 6 应用s: Portable Digital Audio Player, Wireless Headphone Electronics, Compact Consumer Audio Equipment, Embedded Audio Interface, Audio Test and Measurement, Low-Voltage Audio Interface Board.
Portable Digital Audio Player
The PCM1770PW fits portable digital audio players that require a compact stereo conversion stage and local headphone drive from a low-voltage source. Its 24-bit conversion, 50 kSPS operation, 98 dB SNR rating, and 1.6 V to 3.6 V supply range support audio playback without a separate headphone amplifier. Place the DAC between the I2S source and headphone output, then follow the manufacturer’s recommended decoupling and output network. The 16-pin TSSOP package helps reduce board area, while the integrated amplifier can shorten the analog path compared with separate DAC and amplifier stages.
推荐
Wireless Headphone Electronics
PCM1770PW is suitable for wireless headphone electronics requiring digital-to-analog conversion close to the headphone driver. The I2S interface accepts digital audio from a wireless-audio decoder, while the integrated, software-controlled headphone amplifier provides the final output stage. Its 98 dB SNR and 24-bit conversion establish the audio conversion performance, and the 50 kSPS rate covers the cited operating class. The low 1.6 V to 3.6 V supply range supports compact battery-powered designs, provided that supply sequencing, headphone loading, and output stability are implemented exactly as directed in the manufacturer application circuit.
推荐
Compact Consumer Audio Equipment
The PCM1770PW can support compact consumer audio products that accept I2S data and need a stereo analog headphone output. Integrating the 24-bit DAC and headphone amplifier reduces the number of major active components and can simplify layout within a small enclosure. The 16-pin TSSOP package supports surface-mount assembly, while the 1.6 V to 3.6 V operating range accommodates low-voltage system rails. Designers should budget PCB area for required bypass capacitors and analog output components, and should use the manufacturer pin table to preserve the exact signal assignments and exposed functions of the PW package.
推荐
Embedded Audio Interface
PCM1770PW is appropriate for embedded systems that receive I2S audio and require a local high-performance analog output stage. Its 24-bit resolution, 50 kSPS rate, and 98 dB SNR suit general-purpose embedded audio interfaces, while the low-voltage CMOS implementation aligns with portable embedded hardware. The device can terminate an I2S signal path and directly drive a headphone-oriented load through its integrated amplifier. Implementation should account for clock relationships, digital input levels, analog grounding, output loading, and decoupling. The manufacturer’s recommended circuit provides the appropriate starting point for a production-quality board rather than an improvised analog network.
推荐
Audio Test and Measurement
The PCM1770PW can be evaluated for compact audio test equipment that needs a known I2S-to-analog conversion path. The 98 dB SNR specification provides a clear performance reference, while the integrated headphone amplifier enables direct testing of common low-impedance audio outputs without a separate driver. Its 50 kSPS capability is suitable for non-ultrasonic audio test signals and general signal-chain verification. For instrumentation, isolate analog and digital return currents, follow the manufacturer grounding topology, and account for the output network and load requirements. Calibration or test-fixture design should use the documented conversion and output characteristics as the baseline.
推荐
Low-Voltage Audio Interface Board
PCM1770PW is well suited to a dedicated low-voltage audio interface board that converts I2S data into stereo headphone outputs. The device combines 24-bit conversion, 50 kSPS operation, 98 dB SNR, and a 16-pin TSSOP package in one component set, simplifying the active portion of the design. Its 1.6 V to 3.6 V range can be derived from a low-voltage system rail, while the software-controlled headphone amplifier allows a connected controller to manage the output configuration. Board construction should include local high-frequency decoupling, controlled return paths, and the manufacturer-specified output components. Confirm pin functions and supported operating modes directly from the official datasheet before fabrication.
推荐
工程参考数据： PCM1770PW ——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 | PCM1771PW |
|---|---|---|
| Package | TSSOP-16 (PW) | TSSOP-16 (PW) |
| Brand | Texas Instruments | Texas Instruments |
| Product Type | Stereo DAC with integrated headphone amplifier | Stereo DAC with integrated headphone amplifier |
| Converter Resolution | 24 bit | 24 bit |
关键差异点
- Documented stereo converter and headphone integration （对比 PCM1771PW)
- Published full-scale operating point （对比 PCM1771PW)
- Published noise-performance figure （对比 PCM1771PW)
设计说明
Place the required bypass capacitors directly beside their associated supply and ground pins, and route digital I2S signals away from the headphone-output and analog reference paths. Keep the analog return path compact and continuous, while separating switching-node or high-current return paths from the converter area. Use the manufacturer recommended layout as the basis for component placement because the PW package combines digital control, analog conversion, and headphone-output functions on a small footprint.
Design the 1.6 V to 3.6 V supply rails so they remain within the limits shown in the Texas Instruments datasheet across startup, headphone load, and audio playback. Provide local high-frequency decoupling and verify the analog supply at the PCM1770PW pins rather than only at the regulator output. If the headphone amplifier is enabled dynamically, check sequencing and shutdown behavior against the software-control sequence documented by the manufacturer.
Treat the I2S clock, serial data, and word-select signals as a compact digital interface and use the manufacturer’s timing requirements for the host source. Maintain a continuous ground reference between the audio source and the PCM1770PW, avoid routing clock edges beneath the analog output section, and apply the datasheet’s output network and load recommendations. These steps reduce conversion artifacts, coupling, and unstable headphone-output behavior.
合规信息
Compliance status is not stated in the manufacturer or distributor result excerpts. Confirm current environmental, material, and automotive qualification information from the manufacturer product documentation before production release.
