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 PCM186xs 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.
● 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
