PCM1861-Q1 - Automotive 110dB 2-Channel Hardware-Controlled Audio ADC With Universal Front End

The PCM186x-Q1 family (PCM1860-Q1, PCM1861-Q1, PCM1862-Q1, PCM1863-Q1, PCM1864-Q1, andPCM1865-Q1) of audio front-end devices take a new approach to audio-function integration to easecompliance with European Ecodesign legislation, while enabling high-performance end products atreduced cost. The PCM186x-Q1 support single-supply operation at 3.3 V, and offer an integratedprogramable gain amplifier (PGA) in a small package; this configuration makes it feasible toimplement smaller and smarter products at a reduced cost.

The PCM186x-Q1 audio front end supports single-ended input levels from small-mVmicrophone inputs to 2.1-V_RMS line inputs, without external resistordividers. The front-end mixer (MIX), multiplexer (MUX), and PGA also support differential (Diff),pseudo-differential, and single-ended (SE) inputs, making these devices an ideal interface forproducts that require interference suppression. The PCM186x-Q1 integrate many system-levelfunctions that assist or replace some DSP functions.

An integrated band-gap voltage reference provides excellent PSRR, so that a dedicatedanalog 3.3-V rail may not be required.

• AEC-Q100 Qualified for Automotive Applications
  • Temperature Grade 1: –40°C ≤ T_A ≤ +125°C
  • HBM ESD Classification Level 2
  • CDM ESD Classification Level C5
• High SNR Performance:
  • 110-dB SNR (PCM1861-Q1/63-Q1/65-Q1)
  • 103-dB SNR (PCM1860-Q1/62-Q1/64-Q1)
• ADC Sample Rate (f_S) = 8 kHz to 192 kHz
• Up To Four Independent ADC Channels Available
• Single-Ended, 2.1-V_RMS Full-Scale (FS) Input
• Differential, 4.2-V_RMS FS Input
• Hardware (HW) Control: PCM1860-Q1/61-Q1
• Software (SW) Control (I²C or SPI):
  PCM1862-Q1/63-Q1/64-Q1/65-Q1
• Support for Up To Four Digital Microphones
  (SW-Controlled Devices)
• Programmable Gain Amplifier (PGA):
  • Fixed Gain: 0 dB, 12 dB, 32 dB
    (PCM1860-Q1/61-Q1)
  • SW-Controlled Gain: –12 dB to +32 dB
    (PCM1862-Q1/63-Q1/64-Q1/65-Q1)
• Integrated High-Performance Audio PLL
• Single 3.3-V Power-Supply Operation
• Power Dissipation at 3.3 V:
  • < 85 mW (PCM1860-Q1/61-Q1/62-Q1/63-Q1)
  • < 145 mW (PCM1864-Q1/65-Q1)
• Energysense Audio Content Detector for Auto System Wakeup and Sleep
• Master or Slave Audio Interface
• Automatic PGA Clipping Suppression Control
• PCB-Footprint Compatibility Across All Devices

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