Audio Codec 2ADC / 2DAC 24-Bit 32-Pin VQFN EP Tube

The PCM3052A is a low-cost, single-chip, 24-bit stereo audio codec (ADC and DAC) with single-ended analog voltage input and output. It also has an analog front end consisting of a 34-dB microphone amplifier, microphone bias generator, 2 stereo multiplexers, and a wide-range PGA.Analog- to-digital converters (ADCs) employ delta-sigma modulation with 64-times oversampling.On the other hand, digital-to-analog converters (DACs) employ modulation with 64- and 128-times oversampling.ADCs include a digital decimation filter with a high-pass filter, and DACs include an 8-times oversampling digital interpolation filter.The PCM3052A has many functions which are controlled using the I2C interface: DAC digital de-emphasis, digital attenuation, soft mute etc.The PCM3052A also has an S/PDIF output pin for the DAC digital input.The power-down mode, which works on ADCs and DACs simultaneously, is provided by an external pin.The PCM3052A is suitable for a wide variety of cost-sensitive PC audio (recorder and player) applications where good performance is required.The PCM3052A is fabricated using a highly advanced CMOS process and is available in a small 32-pin VQFN package.

Microphone Amplifier and Bias

• Monaural Microphone Amplifier: 34-dB Gain at Differential Input
• Microphone Bias: 1 mA at 3.75 V

Multiplexer and PGA

• Multiplex of Stereo Single-Ended Line Inputs and Monaural Microphone Amplifier
• 0.1 Vrms to 1.5 Vrms Full-Scale Input Range
• 22-kO Input Resistance at 0.1-Vrms Input
• 20 dB to -4 dB/range, 1 dB/step PGA

Reference Output: ±10 mA at 2.5 V

24-Bit Delta-Sigma ADC and DAC

Stereo ADC:

• Full-Scale Input:3 Vp-p
• Antialiasing Filter Included
• 1/64 Decimation Filter:
  Pass-Band Ripple:±0.05 dB
  Stop-Band Attenuation:-65 dB
• On-Chip High-Pass Filter: 0.91 Hz at f_S = 48 kHz
• High Performance:
  THD+N:-94 dB (Typical)
  SNR:101 dB (Typical)
  Dynamic Range:101 dB (Typical)

Stereo DAC:

• Single-Ended Voltage Output: 4 Vp-p
• Analog Low-Pass Filter Included
• ×8 Oversampling Digital Filter:
  Pass-Band Ripple: ±0.03 dB
  Stop-Band Attenuation: -50 dB
• High Performance:
  THD+N:-97 dB (Typical)
  SNR:105 dB (Typical
  Dynamic Range:104 dB (Typical)

S/PDIF Output for DAC Digital Input

Multiple Functions With I²C Interface:

• Digital De-Emphasis: 32-, 44.1-, 48-kHz
• Zipper-Noise-Free Digital Attenuation and Soft Mute for DAC
• HPF Bypass Control for ADC
• S/PDIF Output Control
• Power Down:ADC/DAC Independently

External Power-Down Pin:

• ADC/DAC Simultaneously

Audio Data Format: 24-Bit I²S Only

Sampling Rate:

• 16-96 kHz for Both ADC and DAC

System Clock: 256 f_S Only

Dual Power Supplies:

• 5 V for Analog and 3.3 V for Digital

Package:VQFN-32