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PCM1860DBT ADC, Audio 24 b 192k I²S 30-TSSOP
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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
Applications
• Home Theater and TV
• Voice Controlled Devices
• Bluetooth® Speaker
• Microphone Array Processors
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 highperformance 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), pseudodifferential, 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.
