PCM1808 - 99dB SNR Stereo ADC With Single-Ended Inputs

The PCM1808 device is a high-performance, low-cost, single-chip, stereo analog-to-digital converter with single-ended analog voltage input. The PCM1808 device uses a delta-sigma modulator with 64-times oversampling and includes a digital decimation filter and high-pass filter that removes the dc component of the input signal. For various applications, the PCM1808 device supports master and slave mode and two data formats in serial audio interface.

The PCM1808 device supports the power-down and reset functions by means of halting the system clock.

The PCM1808 device is suitable for wide variety of cost-sensitive consumer applications requiring good performance and operation with a 5-V analog supply and 3.3-V digital supply. Fabrication of the PCM1808 device uses a highly advanced CMOS process. The device is available in a small, 14-pin TSSOP package.

• 24-Bit Delta-Sigma Stereo A/D Converter
• Single-Ended Voltage Input: 3 Vp-p
• High Performance:
  • THD+N: –93 dB (Typical)
  • SNR: 99 dB (Typical)
  • Dynamic Range: 99 dB (Typical)
• Oversampling Decimation Filter:
  • Oversampling Frequency: ×64
  • Pass-Band Ripple: ±0.05 dB
  • Stop-Band Attenuation: –65 dB
  • On-Chip High-Pass Filter: 0.91 Hz (48 kHz)
• Flexible PCM Audio Interface
  • Master- or Slave-Mode Selectable
  • Data Formats: 24-Bit I²S, 24-Bit Left-Justified
• Power Down and Reset by Halting System Clock
• Analog Antialias LPF Included
• Sampling Rate: 8 kHz–96 kHz
• System Clock: 256 f_S, 384 f_S, 512 f_S
• Resolution: 24 Bits
• Dual Power Supplies:
  • 5-V for Analog
  • 3.3-V for Digital
• Package: 14-Pin TSSOP