• Analog Front End:
  • Stereo Single-Ended Input With Multiplexer
  • Mono Differential Input
  • Stereo Programmable Gain Amplifier
  • Microphone Boost Amplifier (20 dB) and Bias
• Analog BackEnd:
  • Stereo/Mono Line Output With Volume
  • Stereo/Mono Headphone Amplifier With Volume and Capless Mode
  • Stereo/Mono Digital Speaker Amplifier (BTL) With Volume (PCM3793)
• Analog Performance:
  • Dynamic Range: 93 dB (DAC)
  • Dynamic Range: 90 dB (ADC)
  • 40-mW + 40-mW Headphone Output at R_L = 16
  • 700-mW + 700-mW Speaker Output at R_L = 8
• Power Supply Voltage
  • 1.71 V to 3.6 V for Digital I/O Section
  • 1.71 V to 3.6 V for Digital Core Section
  • 2.4 V to 3.6 V for Analog Section
  • 2.4 V to 3.6 V for Power Amplifier Section
• Low Power Dissipation:
  • 7 mW in Playback, 1.8 V/2.4 V, 48 kHz
  • 13 mW in Record, 1.8 V/2.4 V, 48 kHz
  • 30 µW in Power Down
• Sampling Frequency: 5 kHz to 50 kHz
• Automatic Level Control for Recording
• Operation From a Single Clock Input Without PLL
• System Clock:
  • Common-Audio Clock (256 f_S/384 f_S), 12/24, 13/26, 13.5/27, 19.2/38.4, 19.68/39.36 MHz
• Headphone Plug Insert Detection
• 2 (I²C) or 3 (SPI) Wire Serial Control
• Programmable Function by Register Control:
  • Digital Attenuation of DAC: 0 dB to -62 dB
  • Power Up/Down Control for Each Module
  • 6-dB to -70-dB Gain for Analog Outputs
  • 30-dB to -12-dB Gain for Analog Inputs
  • 0/20 dB Boost Selectable for Microphone Input
  • 0-dB to -21-dB Gain for Analog Mixing
  • Parameter Settings for ALC
  • Three-Band Tone Control and 3D Sound
  • High-Pass Filter and Two-Stage Notch Filter
  • Analog Mixing
• Pop-Noise Reduction Circuit
• Short and Thermal Protection Circuit
• Package: 5-mm × 5-mm QFN Pacakge
• Operation Temperature Range: -40°C to 85°C
• APPLICATIONS
  • Portable Audio Player, Cellular Phone
  • Video Camcorder, Digital Still Camera
  • PMP/DMB

The PCM3793/94 is a low-power stereo CODEC designed for portable digital audio applications. The device integrates stereo digital speaker amplifier, headphone amplifier, line amplifier, line input, boost amplifier, microphone bias, programmable gain control, analog mixing, sound effects, and automatic level control (ALC). It is available in a small-footprint, 5-mm × 5-mm QFN package. The PCM3793/94 accepts right-justified, left-justified, I²S, and DSP formats, providing easy interfacing to audio DSP, decoder, and encoder chips. Sampling rates up to 50 kHz are supported. The user-programmable functions are accessible through a two- or three-wire serial control port.