Audio Serial

Interface

(TDM, I

PLL and Clock Generation

Hardware Pin

Control

Interface

MICBIAS, Regulators and Voltage

Reference

Configurable

Digital Filters,

and DRE

Quad Channel

ADC with

Front-End DRE

Amplifier

IN1P

IN1M

IN2P

IN2M

IN3P

IN3M

IN4P

IN4M

MICBIAS

VREF

FSYNC

BCLK

SDOUT

MSZ

SHDNZ

FMT0

FMT1

MD0

MD1

AREG

DREG

AVSS

Thermal Pad

(VSS)

AVDD

IOVDD

Product

Folder

Order

Now

Technical

Documents

Tools &

Software

Support &

Community

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.

PCM1840

SBAS989 – APRIL 2019

1

1 Features

1

•

Multichannel high-performance ADC:

–

4-channel analog microphones or line-in

•

ADC line and microphone differential input

performance:

–

Dynamic range:

–

123-dB, dynamic range enhancer enabled

–

113-dB, dynamic range enhancer disabled

–

THD+N: –98 dB

•

•

•

Hardware pin control configurations

•

Linear-phase or low-latency filter selection

•

Flexible audio serial data interface:

–

Master or slave interface selection

–

32-bits, 4-channel TDM

–

32-bits, 2-channel TDM

–

–

32-bits, 2-channel left-justified (LJ)

•

Automatic power-down upon loss of audio clocks

•

Integrated high-performance audio PLL

•

Low-noise MICBIAS 2.75-V output

•

Single-supply operation: 3.3 V

•

I/O-supply operation: 3.3 V or 1.8 V

•

Power consumption for 3.3-V AVDD supply:

–

17.0 mW/channel at 16-kHz sample rate

–

18.4 mW/channel at 48-kHz sample rate

2 Applications

•

Smart speakers

•

DVD recorders and players

•

AV receivers

•

Video conference systems

•

IP network cameras

3 Description

The PCM1840 is a high-performance, Burr-Brown™

audio analog-to-digital converter (ADC) that supports

simultaneous sampling of up to four analog channels.

The device supports differential line and microphone

integrates microphone bias voltage, a phase-locked

loop (PLL), a DC removal high-pass filter (HPF), and

supports sample rates up to 192 kHz. The device

justified (LJ) audio formats, selectable with the

hardware

pin

level.

Additionally,

the

PCM1840

supports master and slave mode selection for the

audio bus interface operation. These integrated high-

performance features, along with the ability to be

powered from a single supply of 3.3 V, make the

device an excellent choice for cost-sensitive, space-

constrained audio systems in far-field microphone

recording applications.

The PCM1840 is specified from –40°C to +125°C,

and is offered in a 24-pin WQFN package.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

PCM1840

WQFN (24)

4.00 mm × 4.00 mm with

0.5-mm pitch

(1) For all available packages, see the package option addendum

at the end of the data sheet.

Simplified Block Diagram