Audio Codec 2ADC / 2DAC 20-Bit 24-Pin SSOP T/R

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. 

Monolithic 20-Bit S 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