PCM1774 - 具有 HP 放大器的 93dB SNR 低功耗立体声 DAC（软件控制）

PCM1774是TI德州仪器公司的一款音频DAC产品，PCM1774是具有 HP 放大器的 93dB SNR 低功耗立体声 DAC（软件控制），本站介绍了PCM1774的封装应用图解、特点和优点、功能等，并给出了与PCM1774相关的TI元器件型号供参考。

PCM1774 - 具有 HP 放大器的 93dB SNR 低功耗立体声 DAC（软件控制） - 音频DAC - 音频转换器 - 德州仪器

产品描述

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.

产品特性

Analog Front End:
- Stereo Single-Ended Input
- Microphone Amplifier (12 dB, 20 dB)
Analog Back End:
- Stereo/Mono Line Output With Volume
- Stereo/Mono Headphone Amplifier With Volume
Analog Performance:
- Dynamic Range: 93 dB
- 40-mW + 40-mW Headphone Output at RL = 16
Power Supply Voltage
- 1.71 V to 3.6 V for Digital I/O Section
- 1.71 V to 3.6 V for Digital Core Section
- 2.4 V to 3.6 V for Analog Section
- 2.4 V to 3.6 V for Power Amplifier Section
Low Power Dissipation:
- 6.4 mW in Playback, 1.8 V/2.4 V, 44.1 kHz
- 3.3 µW in Power Down
Sampling Frequency: 5 kHz to 50 kHz
Operation From a Single Clock Input Without PLL
System Clock:
- Common-Audio Clock (256 fS/384 fS), 12/24, 13/26, 13.5/27, 19.2/38.4, 19.68/39.36 MHz
2 (I2C™) or 3 (SPI) Wire Serial Control
Programmable Function by Register Control:
- Digital Attenuation: 0 dB to -62 dB
- Digital Gain of DAC: 0, 6, 12, 18 dB
- Power Up/Down Control for Each Module
- 6-dB to -70-dB Gain for Analog Outputs
- 0/12/20 dB for Microphone Input
- 0-dB to -21-dB Gain for Analog Mixing
- Three-Band Tone Control and 3D Sound
- Analog Mixing Control
Pop-Noise Reduction Circuit
Short Protection Circuit
Package: 4-mm × 4-mm QFN Package
Operation Temperature Range: -40°C to 85°C
APPLICATIONS
- Portable Audio Player, Cellular Phone
- Video Camcorder, Digital Still Camera
- PMP/DMB/PND

I2C is a trademark of Philips Electronics.

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