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Table of Contents

Application Note

Scalable Automotive Audio Solutions Using the PCM6xx0­
Q1 Family of Products

Krunal Maniar
ABSTRACTThe automotive industry is experiencing a major transformation focused on comfortable driving experience
without compromising fuel-efficiency and manufacturing cost. Car OEMs are frequently refreshing their audio
system architecture to accommodate a user-rich experience and better safety by incorporating several
new audio technologies. Active Noise Cancellation (ANC), In-Cabin Communication (ICC), and Hands-free
Voice Beam-forming Systems make the cars quieter and enhance the communication experience between
passengers. Depending on system requirements, vehicle size and luxury level (low, middle, and high end),
OEMs use different numbers of microphones for each of these applications. As these technologies continue toevolve, there is a dire need of scalable audio solutions to speed up the hardware and software development
among the designers.
To accommodate the short- and long-term vision of OEMs and TIer1s in most cost-optimized and spaceconstrained manner, Texas Instruments has developed a highly-integrated, package- and software-compatible,
high-performance, multi-channel audio ADC family called PCM6260-Q1. The PCM6260-Q1 family of products
provide flexible and scalable solutions for microphone and line input applications, facilitating high levels ofhardware and software scalability.

Table of Contents
1 Introduction to the PCM6260-Q1 Family...............................................................................................................................2
2 Understanding PCM6xx0-Q1 Hardware and Software Compatibility.................................................................................3
3 Revision History......................................................................................................................................................................5

List of Figures
Figure 1-1. PCM6260-Q1 Functional Block Diagram.................................................................................................................. 2Figure 2-1. PCM6xx0-Q1 Pin-Compatibility Diagram.................................................................................................................. 3
Figure 2-2. Schematic Differences Between PCM6240-Q1 and PCM6340-Q1...........................................................................4

List of Tables
Table 1-1. PCM6xx0-Q1 Family Offerings................................................................................................................................... 2Trademarks
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Introduction to the PCM6260-Q1 Family

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1 Introduction to the PCM6260-Q1 Family
To accommodate the short- and long-term vision of OEMs and TIer1s in most cost-optimized and spaceconstrained manner, Texas Instruments developed a highly-integrated, package- and software-compatible,
high-performance, multi-channel audio ADC family called PCM6260-Q1. These devices support microphone(analog and digital) and line inputs and integrate a programmable high-voltage microphone bias and input fault
diagnostics. These devices provide a very flexible digital filtering scheme with linear phase, low latency andultra-low latency filters, multiple programmable biquads per channel, and high-pass filters. The PCM6260-Q1
family supports 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. Figure 1-1 shows afunctional block diagram of the PCM6260-Q1 device.
MICBIAS

BSTOUT

BSTSW

BSTVDD

IN1P
IN1M

PCM6260-Q1
SHDNZ

Boost Converter andProgrammable MICBIAS

PLL and Clock
GenerationGPIO1

IN2P
IN2M
IN3P
IN3M

IN4PFSYNC

Multi-Channel
ADC
with Front-End
PGA and Input
Attenuator

Programmable
Digital Filters andBiquads

Audio SerialInterface(TDM, I2S, LJ)

BCLK
SDOUT

IN4M
SDA_SSZ
IN5P
SCL_MOSI
IN5M

IN6P

Programmable
Input
Diagnostics

Regulators andVoltage
Reference

I2C or SPI
Control Interface

ADDR0_SCLKADDR1_MISO

IN6M
VBAT_IN

VREF

AREG

DREG

VSS

AVSS

AVDD

IOVDD

Figure 1-1. PCM6260-Q1 Functional Block Diagram
The PCM6260-Q1 device is one of the PCM6xx0-Q1 family that are available in two (PCM6020-Q1), four
(PCM6240-Q1, PCM6340-Q1), six (PCM6260-Q1, PCM6360-Q1), and eight (PCM6480-Q1) channel packageand software-compatible options. Table 1-1 shows the different offerings of this audio ADC family.
Table 1-1. PCM6xx0-Q1 Family Offerings

2Device# of inputs

Boost Converter

Microphone Bias

Microphone Diagnostics

PCM6480-Q1

4 Analog, 4 Digital

✓

✓

✓

PCM6260-Q1

6 Analog✓✓✓

PCM6360-Q1

6 Analogx✓✓

PCM6240-Q1

4 Analog✓✓✓

PCM6340-Q1

4 Analogx✓✓

PCM6020-Q1

2 Analog✓✓✓

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Understanding PCM6xx0-Q1 Hardware and Software Compatibility

2 Understanding PCM6xx0-Q1 Hardware and Software Compatibility

^^

AVDD

1

^

^

^

^

^

AREG

2

^

^

AVDD

^

AVDD

BSTVDD3^^^
SCL_MOSI25^^
SDA_SSZ26

^

^

^
^
^

^

^
IOVDD
27

^

^
^

^

^
GPIO128

^

^^

^

^
SDOUT29

^

^^

^

^
BCLK30^^^^

PCM6360-Q1^

PCM6240-Q1

FSYNCPCM6340-Q1

DREG

PCM6480-Q131

^

^

^
^

^

^
^

PCM6020-Q132

^
^

^

^

Hardware Compatibility: The PCM6xx0-Q1 family is offered in the same ultra-small 5 mm × 5 mm QFNpackage. The pinout for PCM6xx0-Q1 devices are similar except that for the input pins to accommodate different
channel and boost options. This allows easy and quick migration of hardware schematics and layout as thesystems requirements change across projects and end-applications or evolve over time. The pin-compatibility
diagram, as Figure 2-1 shows, highlights the minor re-definition in pinout between PCM6xx0-Q1 products toenable additional features.

PCM6260-Q1
24

ADDR0_SCLK

^^^^

^

23

ADDR1_MISO^^^^^22

SHDNZ^^^^^21

VBAT_IN^

20

IN6M

^19

IN6P

^

GPI1

GPI1

PDMDIN1_GPI1

GPI118IN5M^GPIO3GPIO3PDMCLK2_GPIO3

GPIO3

17

IN5P

^

GPI2

GPI2

PDMDIN2_GPI2

GPI2

VSS

16

IN4M

^^

^

^GPIO2GPIO2PDMCLK1_GPIO2GPIO2Re-defined pins^^^^^^NCNCNCNCRe-defined pins^^^15

IN4P^^^^^

14IN3M^^^^^^^

^

^

13

PCM6240-Q1

IN3P

PCM6340-Q1

^

8

^

AVSS^

^

12

^

IN2P^

^^^^

^

7116VREF

IN2P

MICBIAS^

^

^

^^^

^

^^^

10

^

^

IN1M

^

^

5

^

4BSTOUT

^

BSTSW

HVDD

9AVSS

^

IN1P

^

HVDD

Top View
32-Pin, 0.5mm Pitch
RTV Package(5mmx5mmx0.75mm)
WQFN w/ Exposed Thermal
Pad

^

AVSS

^

PCM6260-Q1^^

PCM6360-Q1^

PCM6480-Q1

PCM6xx0-Q1 Family

PCM6020-Q1

Re-defined pins

Figure 2-1. PCM6xx0-Q1 Pin-Compatibility Diagram

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Understanding PCM6xx0-Q1 Hardware and Software Compatibility

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For example, the only hardware change in migrating from the PCM6240-Q1 to the PCM6340-Q1 is on pins 3, 4,
and 5 as highlighted in Figure 2-2.
11 V
(5.6 V to 12 V)
2.2 F

2.2 F
1 F
3.3 V
(3.0 V to 3.6 V)

VBAT_IN(Max 18V)

SCL_MOSI(SCL)

R2

GND

Host
Processor

GPIO1

GPIO2

FSYNC

GPIO3

IN4M

SHDNZ

SCL_MOSI
(SCL)

GPIO1

SDA_SSZ
(SDA)

BCLK

SDOUT

GPIO2

FSYNC

GPIO3

SHDNZ

GPI1

IN4P

R1R1

R2GND

R1R1
GPI2

GND
ADDR0_SCLK(ADDR0)

R1R1

GND
Mic 4
R2

GND

AVDD

R1

R1
IN4M

ADDR1_MISO(ADDR1)
IN3M

GND
IN4P

GND

IN3P

Mic 3

ADDR0_SCLK(ADDR0)

3.3 V(3.0 V to 3.6 V)
OR
1.8 V(1.65 V to 1.95 V)

GND

Thermal Pad(VSS)

R1

R1GND
Mic 4

PCM6340-Q1IN2P
IN2M

GND
GND

IN3M

IOVDD

0.1 F

GND
Mic 2

GND

IN3P

AREG

GND

Thermal Pad(VSS)

ADDR1_MISO(ADDR1)

GND
Mic 310 F

IN1M

R1R1

PCM6240-Q1

IN2P
IN2M

GND

IN1P

Mic 1

0.1 F

GND
Mic 2

VREF

3.3 V
(3.0 V to 3.6 V)
OR
1.8 V(1.65 V to 1.95 V)

10 F

0.1 F

MICBIAS

R1R1IOVDD

GND

GND

AVDD

10 F

IN1M

0.1 F
GND

R1R1GND

IN1P

0.1 F
GND

DREG

GND

0.1 F

1 F

AVSS

DREG

MICBIAS

Mic 1

VBAT_IN
1 F

HVDD

10 F

0.1 FGND

AVSS

AVDD

AREG

AVSS

VREF

BSTVDD

BSTOUT

GND

GND

2.2µH

BSTSW

VBAT_IN

0.1 F
GND

GPI1

VBAT_IN(Max 18V)

1 F

0.1 F
GND

1 F
3.3 V
(3.0 V to 3.6 V)

GND

1 F

GPI2

GND

10 F

0.1 F

SDA_SSZ
(SDA)

0.1 F
0.1 F
GND

3.3 V
(3.0 V to 3.6 V)

2.2 F

BCLK

10 F

SDOUT

3.3 V
(3.0 V to 3.6 V)

2.2 F

R2
Host
Processor

Figure 2-2. Schematic Differences Between PCM6240-Q1 and PCM6340-Q1
Software Compatibility: The PCM6xx0-Q1 family uses exactly the same data and control interfaces, similarregister map definitions, and have the same digital timing requirements. This high level of software compatibility
allows the designer to re-use the application software or driver with ease across platforms and thereby save timeand development cost.

4

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Revision History

3 Revision History
Changes from Revision * (June 2020) to Revision A (May 2022)
Page• Updated the numbering format for tables, figures, and cross-references throughout the document..................1SBAA424A – JUNE 2020 – REVISED MAY 2022
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