描述 Description

The PCM3002 and PCM3003 are low-cost, single-chip stereo audio codecs (analog-to-digital and digital-to-analog converters) with single-ended analog voltage input and output.

The ADCs and DACs employ delta-sigma modulation with 64-times oversampling. The ADCs include a digital decimation filter, and the DACs include an 8-times oversampling digital interpolation filter. The DACs also include digital attenuation, de-emphasis, infinite zero detection, and soft mute to form a complete subsystem. The PCM3002 and PCM3003 operate with left-justified (ADC) and right-justified (DAC) formats, while the PCM3002 also supports other formats, including the I2S data format. The PCM3002 and PCM3003 provide a power-down mode that operates on the ADCs and DACs independently.

The PCM3002 and PCM3003 are fabricated using a highly advanced CMOS process, and are available in a 24-pin SSOP package. The PCM3002 and PCM3003 are suitable for a wide variety of cost-sensitive consumer applications where good performance is required.

The PCM3002 programmable functions are controlled by software. The PCM3003 functions, which are controlled by hardware, include de-emphasis, power-down, and audio data format selections.

特性 Features

? Monolithic 20-Bit ADC and DAC
? 16/20-Bit Input/Output Data
? Software Control: PCM3002
? Hardware Control: PCM3003
? Stereo ADC:
Single-Ended Voltage Input
? Antialiasing Filter
? 64× Oversampling
? High Performance
? THD+N: &3150;86 dB
? SNR: 90 dB
? Dynamic Range: 90 dB


? Stereo DAC:
? Single-Ended Voltage Output
? Analog Low-Pass Filter
? 64× Oversampling
? High Performance
? THD+N: –86 dB
? SNR: 94 dB
? Dynamic Range: 94 dB


? Special Features (PCM3002, PCM3003)
? Digital De-Emphasis: 32 kHz, 44.1 kHz, 48 kHz
? Power Down: ADC/DAC Independent

? Special Features (PCM3002)
? Digital Attenuation (256 Steps)
? Soft Mute
? Digital Loopback
? Four Alternative Audio Data Formats

? Sampling Rate: 4 kHz to 48 kHz
? Single 3-V Power Supply
? Small Package: SSOP-24
? APPLICATIONS
? DVC Applications
? DSC Applications
? Portable/Mobile Audio Applications

System Two, Audio Precision are trademarks of Audio Precision, Inc. All other trademarks are the property of their respective owners.