pcm 转换器总览.pdf

TI Confidential – Selective Disclosure PCM 转换器总览转换器总览 —— 模数与数模转换器方案模数与数模转换器方案 1 TI Confidential – Selective Disclosure TI Confidential – Selective Disclosure 蓝牙音箱和蓝牙音箱和Soundbar的传统模拟前端的传统模拟前端  CD4052 PCM1808 DRV632 I2S AUX1 Analog BT/SPDIF 74AHC1G04GV 1. 4片芯片方案，体积比较大，电路复杂； 2. 不支持数字麦克风，没有MIC偏置电压； 3. 5V 和3.3V 供电； 4. 需要分压电阻支持2Vrms； 5. 没有信号检测来做开关机; TI Confidential – Selective Disclosure 蓝牙音箱和蓝牙音箱和Soundbar的模拟前端集成方案的模拟前端集成方案 —— PCM1862/3 Mix & Mux Primary ADC Secondary ADC Primary ADC VINL4 (4M) VINL3 (4P) VINL2 (1M) VINL1 (1P) Mix & Mux VINR1 (2P) VINR2 (2M) VINR4 (3M) VINR3 (3P) Digital Filter (Digital Decimator) MD0/Mode MD1/ADR1/MS MD2/SDA/MOSI MD3/SCL/SBCK MD4/MISO/GPIO0 MD5/(INT A/ DMIM/GPIO1) MD6/(DM CLK/GPIO2) INT/(INT C/GPIO3) Control, GPIO, Interrupt and Digital Mic Input DOUT Clocks & PLLPower LDOO DGND DVDD IOVDD AGND AVDD XI XO SCK BCK LRCK Reference VREF Mic Bias  TI Confidential – Selective Disclosure PCM186x 系列系列 TI Confidential – Selective Disclosure Applications •Bluetooth Speakers •Mini/Micro Component Systems •iPod Dock & PC Speaker •Automotive Head units •Video Security •Products w/ AUX input(s) Benefits PCM186x 高集成度，高性高集成度，高性能能ADC •4x Stereo Analog Mux – Integrated Mic Input and Line input PGA (PCM1862/3) – Mic into 2VRMS direct inputs option •EnergySense, Autopowerdown & Wakeup •XTAL, MCLK or BCK clock source for slave or master mode •Differential Inputs •Integrated PLL provides audio master clocks for entire system •Up to 110db Dynamic Range in p/p packages •Footprint compatible •No need for external mux’s •Integrated Signal Conditioning •Monitor inputs when in shutdown. GPIO interrupt output to wake system host and amplifiers. •No need to layout high speed clocks on the PCB (e.g. 24.567MHz). •Provides highest audio quality / can be used to remove ground loop hum •Drop in a Bluetooth Modules into a design easily, even those without MCLK! •Single PCB design, multiple product spins Features Device # of Channels SNR H/W or S/W Control PCM1860 2 103dB H/W PCM1861 2 110dB H/W PCM1862 2 103dB S/W PCM1863 2 110dB S/W PCM1864 4 103dB S/W PCM1865 4 110dB S/W TI Confidential – Selective Disclosure THD + N 数字音频 接口 封装 信噪比 ADC通道 过采样倍数 PCM180x 系列系列 PCM1803A x64, x128 2x TSSOP: 20-pin 6x8mm -93dB PCM1808 L, I2S 99dB TSSOP: 14-pin 5x6mm L, R, I2S 103dB -95dB x64 TI Confidential – Selective Disclosure Applications AV Amplifier/Receiver Musical Instruments Television PCM180x Benefits PCM180x 24-bit, 96-kHz 立体声立体声ADC DSP • 2x 24-bit Sigma Delta ADCs – SNR: Up to 103dB / THD + N: up to -95dB • Single-Ended analog voltage input • Integrated decimation, anti-aliasing low-pass and high-pass filters • System clock halt • Slave/Master audio interface capable • High performance audio • Helps remove the dc component of the input signal • Suitable for multiple applications Features TAS TI Confidential – Selective Disclosure PCM180x 内部框内部框图图 9 Up to 103db SNR 24-bit ADC 5V Analog 3.3V Digital 2 inputs PCM output TI Confidential – Selective Disclosure THD + N 音频数字 接口 封装 信噪比 ADC 通道 功耗 (Typ) PCM42x 系列系列 PCM4202 308mW 4x TSSOP: 28-pin 5x10mm -105dB PCM4204 PCM, DSD. I2S QFP: 64-pin 10x10mm PCM, DSD 118dB 600mW 2x 引脚兼容 PCM1804 PCM4220 305mW TQFP: 48-pin 9x9mm L, I2S, TDM 2x 123dB -108dB TI Confidential – Selective Disclosure 音频音频 ADC特点特点 11 • 高高性能优化的性能优化的ADC – 大于大于123dB信噪比信噪比 • 立体声，多通道立体声，多通道ADC – 从从2通道到通道到 4通道的通道的 ADC • 灵活的输入和输出灵活的输入和输出 – 最多支持最多支持8 路的输入路的输入/ 多于两路的输出多于两路的输出 • Designed for European EcoDesign Directive – EnergySense 用于开机和待机用于开机和待机 • 超高的集成度超高的集成度 – PGA, 防防Clipping, PLL TI Confidential – Selective Disclosure 12 TI Confidential – Selective Disclosure PCM17xx Series Inputs Supply Voltage Package Control THD SNR (dB) VCC: 5V VDD: 3.3V VCC: 5V VDD: 3.3V R, I2S, L R, DSD, I2S, L R, DSD, I2S, L R, I2S, L PCM1798 R, I2S, L, DSP VCC: 5V VDD: 3.3V VCC: 5V VDD: 3.3V 5V 123 106 -106 -106 -108 H/W S/W, I2C, SPI, TDM S/W I2C, SPI H/W & S/W I2C, SPI H/W -94 -94 SSOP : 5 x 10mm SSOP : 5 x 10mm SSOP : 4 x 8mm SSOP : 5 x 10mm SSOP : 4 x 5mm PCM1795 PCM1792A PCM1789 PCM1754 123 127 113 SBA – Stop-Band Attenuation Pin Compatible TI Confidential – Selective Disclosure Applications A/V Receivers Musical Instruments Car Audio Multitrack recorders Professional Audio Benefits PCM1792 高性能高性能24-bit 立体声音频立体声音频DACs • 2x DAC with 24-bit, 200KHz PCM interface – SNR: Up to 127dB / THD + N: up to -108dB • I/F for optional external Digital Filter/DSP • User Programmable Functions (PCM1795/1792A) • Direct Stream Digital (DSD) Interface • Highest performing DACs in industry • TI Companion DF1706 for highest performance • Attenuation, De-Emphasis, Roll-off, Mute, Zero Flag • Direct interface to DSD Decoders Features TPA6120A2 OPA4134 SACD (DSD) DVD Audio/CD (PCM) Sound Processor PCM1792A TI Confidential – Selective Disclosure PCM179x 框图框图 15 Up to 127dB SNR Hardware and Software controlled solutions I/F for optional external Digital Filter/DSP Up to 108dB THD+N Dual Supply Operation (3.3V & 5V) TI Confidential – Selective Disc。