ADAU1328_15 Datasheet, PDF (1/32 Pages) Analog Devices – 2 ADC/8 DAC with PLL, 192 kHz, 24-Bit Codec

Data Sheet
FEATURES
PLL generated or direct master clock
Low EMI design
108 dB DAC/107 dB ADC dynamic range and SNR
−94 dB THD + N
Single 3.3 V supply
Tolerance for 5 V logic inputs
Supports 24 bits and 8 kHz to 192 kHz sample rates
Differential ADC input
Single-ended DAC output
Log volume control with autoramp function
SPI® controllable for flexibility
Software controllable clickless mute
Software power-down
Right justified, left justified, I²S and TDM modes
Master and slave modes up to 16-channel in/out
48-lead LQFP
APPLICATIONS
Home theater systems
Set-top boxes
Digital audio effects processors
2 ADC/8 DAC with PLL,
192 kHz, 24-Bit Codec
ADAU1328
GENERAL DESCRIPTION
The ADAU1328 is a high performance, single-chip codec that
provides two analog-to-digital converters (ADCs) with differential
input and eight digital-to-analog converters (DACs) with
single-ended output using the Analog Devices, Inc. patented
multibit sigma-delta (Σ-Δ) architecture. An SPI port is included,
allowing a microcontroller to adjust volume and many other
parameters. The ADAU1328 operates from 3.3 V digital and
analog supplies. The ADAU1328 is available in a 48-lead
(single-ended output) LQFP. Other members of this family
include a differential DAC output version.
The ADAU1328 is designed for low EMI. This consideration is
apparent in both the system and circuit design architectures.
By using the on-board PLL to derive the master clock from the
LR clock or from an external crystal, the ADAU1328 eliminates
the need for a separate high frequency master clock and can
also be used with a suppressed bit clock. The digital-to-analog
and analog-to-digital converters are designed using the latest
ADI continuous time architectures to further minimize EMI. By
using 3.3 V supplies, power consumption is minimized, further
reducing emissions.
FUNCTIONAL BLOCK DIAGRAM
DIGITAL AUDIO
INPUT/OUTPUT
ADAU1328
SERIAL DATA PORT
ADC
ADC
DEC
FILTER
48/96/
192kHz
SDATA
OUT
SDATA
IN
CLOCKS
TIMING MANAGEMENT
AND CONTROL
(CLOCK AND PLL)
DIGITAL
FILTER
AND
VOLUME
CONTROL
PRECISION
VOLTAGE
REFERENCE
12.488MHz
CONTROL
PORT
SPI
6.144MHz
DAC
DAC
DAC
DAC
DAC
DAC
DAC
DAC
CONTROL DATA
INPUT/OUTPUT
Figure 1.
Rev. B
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