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PRODUCT INFORMATION

Reference

Multi-Bit

Delta-Sigma

Multi-Bit

Delta-Sigma

Digital

Filters

Audio

Serial

Port

DSD

Engine

Reset

Logic

Control

and

Status

MasterClock

andTiming

VINL+

VCOML

REFGNDL

VREFL

S/M

FMT0

FMT1

OWL0

OWL1

SUB0(WCK0)

SUB1(MCK0)

PCMEN

FS0(MOD3)

FS1(MOD4)

OVFL

OVFR

MODEN

DSDEN(MOD6)

DSDCLK

DSDL

DSDR

DSDMODE

RST

LRCK

BCK

DATA

DF(MOD5)

HPFDR(MOD1)

HPFDL(MOD2)

VREFR

MCKI

REFGNDR

VCOMR

VINL-

VINR+

VINR-

PCM4222

SBAS399A – OCTOBER 2006 – REVISED MARCH 2007

The PCM4222 is a two-channel, multi-bit delta-sigma (

∆Σ) analog-to-digital (A/D) converter. The 6-bit outputs

from the delta-sigma modulators are routed to the digital decimation filter, where the output of the filter provides

linear PCM data. The linear PCM data are output at the audio serial port interface for connection to external

processing and logic circuitry. The multi-bit modulator outputs are also routed to a direct stream digital (DSD)

engine, which converts the multi-bit data to one-bit DSD data. The DSD data are output at a separate serial

interface, allowing both PCM and DSD data to be output simultaneously from the PCM4222. The multi-bit

modulator data may also be output directly, for use by external digital filtering and processing hardware. When

the modulator output mode is enabled, the PCM and DSD outputs are not available.

Figure 36 shows a simplified functional block diagram for the PCM4222, highlighting the interconnection

between the various functional blocks. The pin names noted in parentheses on the block diagram reflect the pin

configuration for the Multi-Bit Modulator (MBM) output mode.

Figure 36. Functional Block Diagram

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