• Universal Analog Mic Input, 2.1VRMS Full Scale
  • 8 Analog Inputs with MUX and PGA
  • Analog pre-mix function before PGA/MUX
  • Single Ended, Pseudo-Differential or Differential Inputs with Mic Bias
  • 4x Digital Microphone Inputs
• Up to 4 Mono ADC channels (PCM1865)
• Hardware Control (PCM1861)
• I2C or SPI Control (PCM1863/5)
• H/W Programmable Gain Amplifier
  • Fixed Mic Pregain select : 20, 32dB (Analog)
• S/W Programmable Gain Amplifier
• Integrated High Performance Audio PLL
• Single 3.3V Supply for Analog and Digital
  • Additional 1.8V Core and Interface for lower power consumption
• Power Dissipation at 3.3V: <85mW (PCM1861/3),<145mW (PCM1865)
• 'Energysense' Audio Content Detector - for auto system wakeup and sleep
• Master or Slave Audio Interface:
• Mixer functionality:
  • Digital Mixer to mix ADC outputs and I2S synchronous inputs
  • Zero Crossing PGA Gain changes
• Automatic PGA Clipping Suppression control
• PCB-footprint compatibility across all 3 devices

• Home Theater and TV
• Automotive Head Units
• Bluetooth® Speaker
• Microphone Array Processors

The PCM186x family of audio front-end devices takes a new approach to audio-function integration to ease compliance with European Ecodesign legislation while enabling high-performance end products. With no need for a 5-volt supply or an external programmable-gain amplifier, smaller, smarter products are feasible at reduced cost.

The PCM186x's highly flexible audio front end supports input levels from small-mV microphone inputs to 2.1VRMS line Inputs without external resistor dividers. The PCM186x family integrates many system-level functions that assist or replace some DSP functions.

All these features are available using a single 3.3V power supply. An integrated bandgap voltage reference provides excellent PSRR, so that a dedicated analog 3.3V rail may not be required.