• Universal Analog Mic Input, 2.1 VRMS Full Scale
  • 8 Analog Input Pins 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 (PCM1864)
• Hardware Control (PCM1860)
• I2C or SPI Control (PCM1862/4)
• H/W Programmable Gain Amplifier
  • Fixed Mic Pregain Select: 20, 32 dB (Analog)
• S/W Programmable Gain Amplifier
• Integrated High Performance Audio PLL
• Single 3.3 V Supply for Analog and Digital
  • Additional 1.8 V Core and Interface for Lower Power Consumption
• Power Dissipation at 3.3 V: <85 mW (PCM1860/2),<145 mW (PCM1864)
• '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 Devices
• Qualified in Accordance With AEC-Q100 for Automotive Applications

• 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-V 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 2.1 VRMS 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 3.3-V power supply. An integrated bandgap voltage reference provides excellent PSRR, so that a dedicated analog 3.3-V rail may not be required.

Block diagrams comparing the devices in the PCM186x can be found in Functional Block Diagram.