PCM1820 datasheet(28/44 Pages) TI

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9 Application and Implementation

Note

Information in the following applications sections is not part of the TI component specification,

and TI does not warrant its accuracy or completeness. TI’s customers are responsible for

determining suitability of components for their purposes, as well as validating and testing their design

implementation to confirm system functionality.

9.1 Application Information

The PCM182(0/1)-Q1 is a multichannel, high-performance audio analog-to-digital converter (ADC) that supports

output sample rates of up to 192 kHz. The device supports up to two analog microphones for simultaneous

recording applications.

The PCM182(0/1)-Q1 configuration is supported using various hardware pin control options. The device

supports a highly flexible, audio serial interface (TDM and I2S) to transmit audio data seamlessly in the system

across devices.

9.2 Typical Application

Figure 9-1 shows a typical configuration of the PCM182(0/1)-Q1 for an application using stereo analog

microelectrical-mechanical system (MEMS) microphones for simultaneous recording operation with a time-

division multiplexing (TDM) audio data slave interface. For best distortion performance, use input AC-coupling

capacitors with a low-voltage coefficient.

3.3 V (3.0 V to 3.6 V)

1.8 V (1.65 V to 1.95 V)

3.3 V

(3.0 V to

3.6 V)

PCM1822-Q1

IN1P

IN1M

GND

0.1 F

GND

10 F

1 F

DREG

10 F

0.1 F

IN2P

IN2M

Host

Processor

IOVDD

Thermal Pad

(VSS)

10 F

AMIC1

OUTP

OUTM

VDD

VSS

AMIC2

OUTP

OUTM

VDD

VSS

LOW or HIGH Pin

Selector

1 μF

0.1 μF

GND GND

1 μF

0.1 μF

GND

0.1 μF

GND

Figure 9-1. Two-Channel Analog Microphone Recording Diagram for 3.3-V AVDD Operation

PCM1820-Q1, PCM1821-Q1

SBASAH4A – APRIL 2022 – REVISED SEPTEMBER 2022

www.ti.com

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Product Folder Links: PCM1820-Q1 PCM1821-Q1

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