WM8711数据手册集成电路（IC）的ADC/DAC-特殊用途规格书PDF

描述 Description

DESCRIPTION
The WM8711 or WM8711L (WM8711/L) is a low power stereo DAC with an integrated headphone driver. The WM8711/L is designed specifically for portable MP3 audio and speech players. The WM8711/L is also ideal for MD, CD machines and DAT players.
Stereo 24-bit multi-bit sigma delta DACs are used with oversampling digital interpolation filters. Digital audio input word lengths from 16-32 bits and sampling rates from 8KHz to 96KHz are supported.
Stereo audio outputs are buffered for driving headphones from a programmable volume control, line level outputs are also provided along with anti-thump mute and power up/down circuitry.
The device is controlled via a 2 or 3 wire serial interface. The interface provides access to all features including volume controls, mutes, de-emphasis and extensive power management facilities. The device is available in a small 28- lead SSOP package or the smaller 28-lead QFN (5x5x0.9 mm Body) package.
A USB mode is provided where all audio rates can be derived from a single 12MHz or 24MHz MCLK, saving on the need for a PLL or multiple crystals.FEATURES
• Audio Performance
   - DAC SNR 100dB (‘A’ weighted) at AVDD = 3.3V
   - DAC SNR 90dB (‘A’ weighted) at AVDD = 1.8V (WM8711L)
• Low Power Headphone Playback
   - Down to 20mW at 3.3V
   - Down to 6mW at 1.8V (WM8711L)
   - 1.42 – 3.6V Digital Supply Operation
   - 2.7 – 3.6 V Analogue Supply Operation
   - 1.8 – 3.6 V Analogue Supply Operation (‘L’ Variant)
• DAC Sampling Frequency: 8KHz – 96KHz
• 2 or 3-Wire MPU Serial Control Interface
• Programmable Audio Data Interface Modes
   - I2S, Left, Right Justified or DSP
   - 16/20/24/32 bit Word Lengths
   - Master or Slave Clocking Mode
• Stereo Audio Outputs
• Output Volume and Mute Controls
• Highly Efficient Headphone Driver
• 28-lead SSOP or 28-lead QFN (5x5x0.9 mm) packageAPPLICATIONS
• Portable MP3 Players
• CD and Minidisc Players

特性 Features

• Audio Performance
   - DAC SNR 100dB (‘A’ weighted) at AVDD = 3.3V
   - DAC SNR 90dB (‘A’ weighted) at AVDD = 1.8V (WM8711L)
• Low Power Headphone Playback
   - Down to 20mW at 3.3V
   - Down to 6mW at 1.8V (WM8711L)
   - 1.42 – 3.6V Digital Supply Operation
   - 2.7 – 3.6 V Analogue Supply Operation
   - 1.8 – 3.6 V Analogue Supply Operation (‘L’ Variant)
• DAC Sampling Frequency: 8KHz – 96KHz
• 2 or 3-Wire MPU Serial Control Interface
• Programmable Audio Data Interface Modes
   - I2S, Left, Right Justified or DSP
   - 16/20/24/32 bit Word Lengths
   - Master or Slave Clocking Mode
• Stereo Audio Outputs
• Output Volume and Mute Controls
• Highly Efficient Headphone Driver
• 28-lead SSOP or 28-lead QFN (5x5x0.9 mm) package

应用 Application

• Portable MP3 Players
• CD and Minidisc Players

简介

WM8711属于集成电路（IC）的ADC/DAC-特殊用途。由制造生产的WM8711ADC/DAC - 特殊用途该产品族中的产品可用于模拟和数字表示的信息转换，适用于特定用例，或集成了通用数据转换器中不常见的其他功能。例如针对超声或汽车雷达应用集成了低噪声放大器和可变增益级的器件、注重音频和视频的产品、在段码式显示器上集成显示测量值功能的器件、集成输入输出电气隔离的器件等。