描述 Description

The PCM3000/3001 is a low-cost, single-chip stereo audio codec (analog-to-digital and digital-to-analog converter) with single-ended analog voltage input and output. Both ADCs and DACs employ delta-sigma modu- lation with 64-times oversampling. The ADCs include a digital decimation filter and the DACs include an 8-times oversampling digital interpolation filter. TheDACs also include digital attenuation, de-emphasis, infinite zero detection and soft mute to form a complete subsystem. The PCM3000/3001 operates with left-justified, right-justified, I2S or DSP data formats.

The PCM3000 can be programmed with a three-wire serial interface for special features and data formats. The PCM3001 can be pin-programmed for data formats.

The PCM3000 and PCM3001 are fabricated using a highly advanced CMOS process and are available in a small 28-pin SSOP package. The PCM3000/3001 are suitable for a wide variety of cost-sensitive consumer applications where good performance is required.

特性 Features

? Monolithic 18-Bit ADC and DAC
? 16- or 18-Bit Input/Output Data
? Accepts Seven Alternate Formats
? Stereo ADC:
? Single-Ended Voltage Input
? 64× Oversampling Digital Filter
? Pass-Band Ripple: ±0.05 dB
? Stop-Band Attenuation: –65 dB

? High Performance:
? THD+N: –88 dB
? SNR: 94 dB
? Dynamic Range: 94 dB

? Digital High-Pass Filter

? Stereo DAC
? Single-Ended Voltage Outut
? Analog Low-Pass Filter
? 8× Oversampling Digital Filter
? Pass-Band Ripple: ±0.17 dB
? Stop-Band Attenuation: 35 dB

? High Performance:
? THD+N: –90 dB
? SNR: 98 dB
? Dynamic Range: 97 dB

? Special Features (PCM3000)
? Digital De-Emphasis
? Digital Attenuation (256 Steps)
? Soft Mute
? Digital Loopback

? Sample Rate: 4 kHz to 48 kHz
? System Clock: 256 fs, 384 fs, 512 fs
? Single 5-V Power Supply
? Small Package: SSOP-28
? APPLICATIONS
? Sampling Keyboards
? Digital Mixers
? Mini-Disk Recorders
? Hard-Disk Recorders
? Karaoke Systems
? DSP-Based Car Stereo
? DAT Recorders
? Video Conferencing


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