PCM1861_15 Datasheet, PDF (1/115 Pages) Texas Instruments – PCM186x 110dB 2ch and 4ch Audio ADCs with Universal Front End

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Burr-Brown Audio
PCM1861, PCM1863, PCM1865
SLAS831C – MARCH 2014 – REVISED AUGUST 2014
PCM186x 110dB 2ch and 4ch Audio ADCs with Universal Front End
1 Features
•1 Universal Analog Mic Input, 2.1V_RMS 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
2 Applications
• Home Theater and TV
• Automotive Head Units
• Bluetooth^® Speaker
• Microphone Array Processors
3 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 2.1V_RMS 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.
Device Information⁽¹⁾
ORDER NUMBER
PACKAGE
BODY SIZE
PCM1861
PCM1863
TSSOP (30)
7.80mm × 4.40mm
PCM1865
(1) For all available packages, see the orderable addendum at
the end of this document.
Simplified Application Diagrams
2ch Single Ended
PCM1863/5
IN
AUX
2ch Single Ended
I2S
BCK
LRCK
DOUT
TMS320C5535
PCM5121
BCK
LRCK
PCM5100
TPA3116
TPA3116
Analog
Sensor
BT Module
- Light Intensity
- Ultrasonic
- Battery Level
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.