PCM1770 - 具有耳机放大器的 24 位低功耗立体声音频 DAC

PCM1770是TI德州仪器公司的一款音频DAC产品，PCM1770是具有耳机放大器的 24 位低功耗立体声音频 DAC，本站介绍了PCM1770的封装应用图解、特点和优点、功能等，并给出了与PCM1770相关的TI元器件型号供参考。

PCM1770 - 具有耳机放大器的 24 位低功耗立体声音频 DAC - 音频DAC - 音频转换器 - 德州仪器

产品描述

The PCM1770 and PCM1771 devices are CMOS, monolithic, integrated circuits which include stereo digital-to-analog converters, headphone circuitry, and support circuitry in small TSSOP-16 and VQFN-20 packages.

The data converters use TI's enhanced multilevel architecture, which employs noise shaping and multilevel amplitude quantization to achieve excellent dynamic performance and improved tolerance to clock jitter. The PCM1770 and PCM1771 devices accept several industry standard audio data formats with 16- to 24-bit data, left-justified, I2S, etc., providing easy interfacing to audio DSP and decoder devices. Sampling rates up to 50 kHz are supported. A full set of user-programmable functions is accessible through a 3-wire serial control port, which supports register write functions.

产品特性

Multilevel DAC Including Headphone Amplifier
Analog Performance (VCC, VHP = 2.4 V):
- Dynamic Range: 98 dB Typ
- THD+N at 0 dB: 0.1% Typ
- THD+N at -20 dB: 0.04% Typ
- Output Power at RL = 16 : 13 mW (Stereo), 26 mW (Monaural)
1.6-V to 3.6-V Single Power Supply
Low Power Dissipation: 6.5 mW at VCC, VHP = 2.4 V
System Clock: 128 fS, 192 fS, 256 fS, 384 fS
Sampling Frequency: 5 kHz to 50 kHz
Software Control (PCM1770):
- 16-, 20-, 24-Bit Word Available
- Left-, Right-Justified, and I2S
- Slave/Master Selectable
- Digital Attenuation: 0 dB to -62 dB, 1 dB/Step
- 44.1-kHz Digital De-Emphasis
- Zero Cross Attenuation
- Digital Soft Mute
- Monaural Analog-In With Mixing
- Monaural Speaker Mode
Hardware Control (PCM1771):
- Left-Justified and I2S
- 44.1-kHz Digital De-Emphasis
- Monaural Analog-In With Mixing
Pop-Noise-Free Circuit
3.3-V Tolerant
Packages: TSSOP-16 and VQFN-20
APPLICATIONS
- Portable Audio Player
- Cellular Phone
- PDA
- Other Applications Requiring Low-Voltage Operation

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