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 3.3V power supply. An integrated bandgap voltage reference provides excellent PSRR, so that a dedicated analog 3.3V rail may not be required.
●Block Diagrams comparing the devices in the PCM186x can be found in _Functional Block Diagram_.
● 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 AllDevices
● Qualified in Accordance With AEC-Q100 for
●Automotive Applications
