PCM1774中文资料具有耳机放大器的 93dB SNR 低功耗立体声 DAC（软件控制）数据手册TI规格书

描述 Description

The PCM1774 is a low-power stereo DAC designed for portable digital audio applications. The device integrates headphone amplifier, line amplifier, line input, boost amplifier, programmable gain control, analog mixing, and sound effects. It is available in a small-footprint, 4-mm × 4-mm QFN package. The PCM1774 supports right-justified, left-justified, I2S, and DSP formats, providing easy interfacing to audio DSP and decoder/encoder chips. Sampling rates up to 50 kHz are supported. The user-programmable functions are accessible through a two- or three-wire serial control port.

特性 Features

• Analog Front End:
• Microphone Amplifier (12 dB, 20 dB)
• Analog Back End:
• Stereo/Mono Headphone Amplifier With Volume
• Analog Performance:
• 40-mW + 40-mW Headphone Output at RL = 16
• Power Supply Voltage
• 1.71 V to 3.6 V for Digital Core Section
• 2.4 V to 3.6 V for Power Amplifier Section
• Low Power Dissipation:
• 3.3 µW in Power Down
• Sampling Frequency: 5 kHz to 50 kHz
• System Clock:
• 2 (I2C™) or 3 (SPI) Wire Serial Control
• Digital Attenuation: 0 dB to -62 dB
• Power Up/Down Control for Each Module
• 0/12/20 dB for Microphone Input
• Three-Band Tone Control and 3D Sound
• Pop-Noise Reduction Circuit
• Package: 4-mm × 4-mm QFN Package
• APPLICATIONS
• Video Camcorder, Digital Still Camera
• PMP/DMB/PND

I2C is a trademark of Philips Electronics.