110dB 2-Channel Hardware-Controlled Audio ADC With Universal Front End - PCM1861

PCM1861 (ACTIVE)

110dB 2-Channel Hardware-Controlled Audio ADC With Universal Front End

 

Description

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.

Features

  • 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

View more

Parametrics Compare all products in Audio ADC

 
ADC Channels
Analog Inputs
ADC SNR (Typ) (dB)
Sampling Rate (Max) (kHz)
Control Interface
Digital Audio Interface
Additional Features
Package Size: mm2:W x L (PKG)
Approx. Price (US$)
Analog Outputs
PCM1861
2   
8   
110   
192   
H/W   
L
I2S   
PLL
Energysense Signal Detection
Analog Mic support   
30TSSOP: 50 mm2: 6.4 x 7.8(TSSOP)   
1.75 | 1ku   
0   

Other qualified versions of PCM1861

Version Part Number Definition
Automotive PCM1861-Q1 Q100 devices qualified for high-reliability automotive applications targeting zero defects