AD1934 Datasheet, PDF (1/28 Pages) Analog Devices – 8-Channel DAC with PLL, 192 kHz, 24 Bits

FEATURES
PLL generated or direct master clock
Low EMI design
108 dB DAC 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
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
Automotive audio systems
Home theater systems
Set-top boxes
Digital audio effects processors
8-Channel DAC with PLL,
192 kHz, 24 Bits
AD1934
GENERAL DESCRIPTION
The AD1934 is a high performance, single-chip that provides
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 AD1934 operates from 3.3 V digital and analog supplies.
The AD1934 is available in a 48-lead (single-ended output)
LQFP. Other members of this family include a differential DAC
output and I²C® control port version.
The AD1934 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 AD1934 eliminates the
need for a separate high frequency master clock and can also be
used with a suppressed bit clock. The digital-to-analog
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
AD1934
SERIAL
DATA
PORT
CLOCKS
SDATAIN
TIMING MANAGEMENT
AND CONTROL
(CLOCK AND PLL)
DIGITAL
FILTER
AND
VOLUME
CONTROL
DAC
DAC
DAC
DAC
DAC
DAC
DAC
DAC
PRECISION
VOLTAGE
REFERENCE
CONTROL PORT
I²C/SPI
6.144MHz
CONTROL DATA
INPUT/OUTPUT
Figure 1.
ANALOG
AUDIO
OUTPUTS
Rev. 0
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