PCM1865 110dB 4-Channel Software-Controlled Audio ADC With Universal Front End | TI.com

PCM1865 (ACTIVE)

110dB 4-Channel Software-Controlled Audio ADC With Universal Front End

 

Automotive AEC-Q100 Grade 1 qualified version available, see PCM1865-Q1.

Description

The PCM186x family (PCM1860, PCM1861, PCM1862, PCM1863, PCM1864, and PCM1865) of audio front-end devices take a new approach to audio-function integration to ease compliance with European Ecodesign legislation, while enabling high-performance end products at reduced cost. The PCM186x support single-supply operation at 3.3 V, and offer an integrated programable gain amplifier (PGA) in a small package; this configuration makes it feasible to implement smaller and smarter products at a reduced cost.

The PCM186x audio front end supports single-ended input levels from small-mV microphone inputs to 2.1-VRMS line inputs, without external resistor dividers. 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 for products that require interference suppression. The PCM186x integrate many system-level functions that assist or replace some DSP functions.

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

Features

  • High SNR Performance:
    • 110-dB SNR (PCM1861/63/65)
    • 103-dB SNR (PCM1860/62/64)
  • ADC Sample Rate (fS) = 8 kHz to 192 kHz
  • Up To Four Independent ADC Channels Available
  • Single-Ended, 2.1-VRMS Full-Scale (FS) Input
  • Differential, 4.2-VRMS FS Input
  • Hardware (HW) Control: PCM1860/61
  • Software (SW) Control (I2C or SPI):
    PCM1862/63/64/65
  • Support for Up To Four Digital Microphones
    (SW-Controlled Devices)
  • Programmable Gain Amplifier (PGA):
    • Fixed Gain: 0 dB, 12 dB, 32 dB
      (PCM1860/61)
    • SW-Controlled Gain: –12 dB to +32 dB
      (PCM1862/63/64/65)
  • Integrated High-Performance Audio PLL
  • Single 3.3-V Power-Supply Operation
  • Power Dissipation at 3.3 V:
    • < 85 mW (PCM1860/61/62/63)
    • < 145 mW (PCM1864/65)
  • 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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Parametrics

Compare all products in Audio ADCs Email Download to Excel
Part number Order 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
PCM1865 Order now 4     8     110     192     I2C     L     30TSSOP: 50 mm2: 6.4 x 7.8 (TSSOP | 30)     3.99 | 1ku     0    
PCM1864 Order now 4     8     103     192     I2C     L     30TSSOP: 50 mm2: 6.4 x 7.8 (TSSOP | 30)     2.99 | 1ku     0    
PCM4204 Order now 4     4     118     216     H/W     DSD
PCM    
64HTQFP: 144 mm2: 12 x 12 (HTQFP | 64)     7.55 | 1ku     0