PCM1865-Q1 Datasheet, PDF (1/108 Pages) Texas Instruments – Universal Front End

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Burr-Brown Audio
PCM1865-Q1
SLASE64 – DECEMBER 2014
PCM1865-Q1 110 dB 4ch Audio ADCs With Universal Front End
1 Features
•1 Universal Analog Mic Input, 2.1 V_RMS Full Scale
– 8 Analog Input Pins 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-Q1)
• I²C or SPI Control (PCM1865-Q1)
• H/W Programmable Gain Amplifier
– Fixed Mic Pregain Select: 20, 32 dB (Analog)
• S/W Programmable Gain Amplifier
• Integrated High Performance Audio PLL
• Single 3.3 V Supply for Analog and Digital
– Additional 1.8 V Core and Interface for Lower
Power Consumption
• Power Dissipation at 3.3 V: <145 mW
• '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 Devices
• Qualified in Accordance With AEC-Q100 for
Automotive Applications
2 Applications
• Home Theater and TV
• Automotive Head Units
• Bluetooth^® Speaker
• Microphone Array Processors
3 Description
The PCM1865-Q1 audio front-end device 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-V supply or an external
programmable-gain amplifier, smaller, smarter
products are feasible at reduced cost.
The PCM1865-Q1's highly flexible audio front end
supports input levels from small-mV microphone
inputs to 2.1 V_RMS line Inputs without external resistor
dividers. The PCM1865-Q1 integrates many system-
level functions that assist or replace some DSP
functions.
All these features are available using a single 3.3-V
power supply. An integrated bandgap voltage
reference provides excellent PSRR, so that a
dedicated analog 3.3-V rail may not be required.
Device Information⁽¹⁾
PART NUMBER PACKAGE
BODY SIZE (NOM)
PCM1865-Q1 TSSOP (30)
7.80 mm × 4.40 mm
(1) For all available packages, see the orderable addendum at
the end of the document.
4 Simplified Application Diagram
2ch Single Ended
PCM1865-Q1
IN
AUX
2ch Single Ended
I2S
BCK
LRCK
DOUT
TMS320C5535
PCM5121
BCK
LRCK
PCM5100
TPA3116D2
TPA3116D2
Analog
Sensor
- Light Intensity
- Ultrasonic
- Battery Level
BT Module
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.