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Application Note

PCM6xx0-Q1 Use-Case Scenarios in Automotive Audio
Applications

Krunal Maniar
ABSTRACTSBAA425A – APRIL 2020 – REVISED MAY 2022
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PCM6xx0-Q1 Use-Case Scenarios in Automotive Audio Applications
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1 Abstract
Table of Contents
1 Abstract................................................................................................................................................................................... 2
2 Introduction.............................................................................................................................................................................3
3 Overview of PCM6260-Q1 Family.......................................................................................................................................... 3
4 PCM6xx0-Q1 Use-Case Scenarios........................................................................................................................................ 45 Revision History......................................................................................................................................................................6

List of Figures
Figure 4-1. ANC with Voice or Auxiliary Audio Input in Head-unit............................................................................................... 4
Figure 4-2. ANC in Head-unit...................................................................................................................................................... 4
Figure 4-3. ANC in Standalone ANC module.............................................................................................................................. 4
Figure 4-4. ANC and 4-digital MIC Hands-free Beamforming in Head-unit................................................................................. 5
Figure 4-5. ANC in Standalone Module, Hands-free Beamforming and AUXIN or Voice input in Head-unit...............................5
Figure 4-6. ANC, Hands-free Beamforming and Auxiliary Input in Head-unit..............................................................................6

List of Tables
Table 3-1. Product Offerings of PCM6xx0-Q1 family................................................................................................................... 3Trademarks
All trademarks are the property of their respective owners.

2PCM6xx0-Q1 Use-Case Scenarios in Automotive Audio Applications
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Introduction

2 Introduction
The automotive industry is experiencing a major transformation focused on comfortable driving experience
without compromising fuel-efficiency and manufacturing cost. Car OEMs are constantly refreshing their audio
system architecture to accommodate user-rich experience and better safety by incorporating several new audiotechnologies. These audio technologies such as active noise cancellation (ANC), in-cabin communication (ICC),and hands-free voice beam-forming use several microphones, amplifiers, and loudspeakers along with advanced
digital signal processing techniques to enable background noise reduction, clear voice communication between
passengers and hands-free calling. ANC is often incorporated in multiple end-equipments such as head-unit(or digital cockpit processing unit) or external amplifiers or can have it's own standalone module. To make thesystem implementation simple and cost-effective, the audio inputs from ANC microphones can be combined withhands-free microphones or other auxiliary line inputs. This paper highlights the several use-case of PCM6xx0Q1 for microphone and line input applications.

3 Overview of PCM6260-Q1 Family
To accommodate the short- and long-term vision of OEMs and TIer1s in most cost-optimized and spaceconstrained manner, Texas Instrument’s developed a highly-integrated, package- and software- compatible
multi-channel audio ADC family called PCM6xx0-Q1. These devices support microphone (analog and digital)and line inputs and integrate a programmable high-voltage microphone bias and input fault diagnostics. Thesedevices provide a very flexible digital filtering scheme with linear-phase and low-latency filters, multiple biquads
per channel, and high-pass filters. PCM6xx0-Q1 family support a very flexible data output and control interface,allowing several devices to use the same output data and control interface bus. In addition, these devices
have GPIOs, fine phase and gain calibration schemes, and a digital mixer and summer, to optimize the system
performance to a whole new level. The different offerings of this audio ADC family are shown in Table 3-1.
Table 3-1. Product Offerings of PCM6xx0-Q1 family
Device# of Inputs

Boost Converter

Microphone Bias

Microphone Diagnostics

PCM6020-Q1

2 Analog

Yes

Yes

Yes

PCM6240-Q1

4 Analog

Yes

Yes

Yes

PCM6340-Q1

4 Analog

No

Yes

Yes

PCM6260-Q1

6 Analog

Yes

Yes

Yes

PCM6360-Q1

6 Analog

No

Yes

Yes

PCM480-Q1

4 Analog, 4 Digital

Yes

Yes

Yes

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4 PCM6xx0-Q1 Use-Case Scenarios
PCM6xx0-Q1 can be used in wide-variety of audio application scenarios in head-unit, external amplifiers, ANCmodule, or audio hubs. Since PCM6xx0-Q1 support analog and digital microphone inputs and line inputs inboth single-ended and differential mode, they cater to almost every conceivable audio signal input scenarios inautomotive.
3.3V
Mic Bias
4-MIC ANC
Active Noise Cancellation

Voice Input orAUXIN

PLL

4-ch

2-ch

Fault
Interrupt
PCM6260-Q1(6-ch Audio ADC)

I2S, TDM

I2C/SPI
Control

Input Diags

GND

Figure 4-1. ANC with Voice or Auxiliary Audio Input in Head-unit
3.3V
Mic Bias

PLL
Fault
Interrupt

4-MIC ANC
Active Noise Cancellation

4-ch

PCM6240-Q1(4-ch Audio ADC)

I2S, TDM

I2C/SPI
Control

Input Diags

GND

Figure 4-2. ANC in Head-unit
3.3V
Mic Bias

PLL
Fault
Interrupt

4-MIC ANC
Active Noise Cancellation

4-ch

PCM6240-Q1(4-ch Audio ADC)

Input Diags

I2C/SPI
Control

TDM

Digital Bus,
Slave Chip

To Head-Unit
GND

Figure 4-3. ANC in Standalone ANC module

4

PCM6xx0-Q1 Use-Case Scenarios in Automotive Audio Applications
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PCM6xx0-Q1 Use-Case Scenarios
3.3V
Mic Bias
4-MIC ANC
Active Noise Cancellation

PLL

4-chFaultInterrupt
TDM

PCM6480-Q1(8-ch Audio ADC)

4-ch4-digital MIC hands-freebeam-formingInput Diags

I2C/SPI
Control

GND

Figure 4-4. ANC and 4-digital MIC Hands-free Beamforming in Head-unit
3.3V

Head-Unit
Mic Bias
4-MIC hands-freebeamforming

PLL

4-ch

2-ch

Fault
Interrupt
PCM6260-Q1(6-ch Audio ADC)

Voice Input or
AUXIN
I2C/SPI
Control

Input Diags

GND

TDM

Digital Bus,
Slave Chip

From ANC module

To Head-Unit

ANC module
3.3V
Mic Bias

PLL
Fault
Interrupt

4-MIC ANC
Active Noise Cancellation

4-ch

PCM6240-Q1(4-ch Audio ADC)

Input Diags

Digital Bus,
Master Chip
TDM

I2C/SPI
Control

GND

Figure 4-5. ANC in Standalone Module, Hands-free Beamforming and AUXIN or Voice input in Head-unit

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Revision History

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3.3V
Mic Bias
4-MIC hands-freebeamforming

PLL

4-ch

2-ch

Fault
Interrupt
PCM6260-Q1(6-ch Audio ADC)

TDM

AUXIN
I2C/SPI
Control

Input Diags

GND
3.3V
Mic Bias

PLLFault
Interrupt

4-MIC ANC
Active Noise Cancellation

4-ch

PCM6240-Q1(4-ch Audio ADC)

Input Diags

TDM

I2C/SPIControl

GND

Figure 4-6. ANC, Hands-free Beamforming and Auxiliary Input in Head-unit
For more details about the product features, refer to the product folder PCM6260-Q1.

5 Revision History
Changes from Revision * (April 2020) to Revision A (May 2022)
Page• Updated the numbering format for tables, figures, and cross-references throughout the document..................36PCM6xx0-Q1 Use-Case Scenarios in Automotive Audio Applications
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