103dB 2-Channel Software-Controlled Audio ADC With Universal Front End

103dB 2-Channel Software-Controlled Audio ADC With Universal Front End - PCM1862


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

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Parametrics Compare all products in Audio ADCs

ADC Channels
Analog Inputs
ADC SNR (Typ) (dB)
Sampling Rate (Max) (kHz)
Control Interface
Digital Audio Interface
Package Size: mm2:W x L (PKG)
Approx. Price (US$)
Analog Outputs
30TSSOP: 50 mm2: 6.4 x 7.8(TSSOP)   
1.59 | 1ku   

Other qualified versions of PCM1862

Version Part Number Definition
Automotive PCM1862-Q1 Q100 devices qualified for high-reliability automotive applications targeting zero defects