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Analog Devices Semiconductor Electronic Components Datasheet



AD1934

8-Channel DAC



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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
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
©2007 Analog Devices, Inc. All rights reserved.



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AD1934
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
General Description ......................................................................... 1
Functional Block Diagram .............................................................. 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Test Conditions............................................................................. 3
Analog Performance Specifications ........................................... 3
Crystal Oscillator Specifications................................................. 4
Digital Input/Output Specifications........................................... 4
Power Supply Specifications........................................................ 5
Digital Filters................................................................................. 6
Timing Specifications .................................................................. 6
Absolute Maximum Ratings............................................................ 8
Thermal Resistance ...................................................................... 8
ESD Caution.................................................................................. 8
Pin Configuration and Function Descriptions............................. 9
Typical Performance Characteristics ........................................... 11
Theory of Operation ...................................................................... 12
REVISION HISTORY
6/07—Revision 0: Initial Version
Digital-to-Analog Converters (DACs) .................................... 12
Clock Signals............................................................................... 12
Reset and Power-Down ............................................................. 12
Serial Control Port ..................................................................... 13
Power Supply and Voltage Reference....................................... 14
Serial Data Ports—Data Format............................................... 14
Time-Division Multiplexed (TDM) Modes............................ 14
Daisy-Chain Mode ..................................................................... 16
Control Registers ............................................................................ 20
Definitions................................................................................... 20
PLL and Clock Control Registers............................................. 20
DAC Control Registers .............................................................. 21
Auxiliary TDM Port Control Registers ................................... 23
Additional Modes....................................................................... 23
Application Circuits ....................................................................... 25
Outline Dimensions ....................................................................... 26
Ordering Guide .......................................................................... 26
Rev. 0 | Page 2 of 28



Part Number AD1934
Description 8-Channel DAC
Maker Analog Devices - Analog Devices
Total Page 28 Pages
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