AD1954YST ,SigmaDSP 3-Channel/ 26-Bit Signal Processing DACSPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 SPI Address Dec ..
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AD1958 ,High Performance, Single-Chip Stereo Digital Audio Playback Systemfeatures include an on-chip stereo attenuator and mute,Rate (A-Weighted Stereo)programmed through a ..
AD1958YRS ,PLL/Multibit DACSPECIFICATIONSTEST CONDITIONS UNLESS OTHERWISE NOTEDSupply Voltages(AVDD, DVDD, PVDD) 5.0 VAmbient ..
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AD8367ARU ,500 MHz, Linear-in-dB VGA with AGC DetectorSpecifications.Enable Input Bias Current ENBL at 5 V 27 AENBL at 0 V 32 nA–2– REV. 0AD8367Paramete ..
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AD8367ARUZ-RL7 , 500 MHz, Linear-in-dB VGA with AGC Detector
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AD1954YST
SigmaDSP 3-Channel/ 26-Bit Signal Processing DAC
ANALOG
DEVICES
SigmaDSPTM 3-Channel, ZB-Bit
Signal Processing Mil
FEATURES
5V 3-Channel Audio DAC System
Accepts Sample Rates up to 48 kHz
7 Biquad Filter Sections per Channel
Dual Dynamic Processor with Arbitrary Input/Output Curve
and AdjustableTime Constants
0 ms to 6 msVariabie Delay/Channel for Speaker Alignment
Stereo Spreading Algorithm for Phat Stereo"' Effect
Program RAM Allows Complete New Program Download
via SPI Port
Parameter RAM Allows Complete Control of MoreThan
200 Parameters via SPI Port
SPI Port Features Safe-Upload Mode forTransparent Filter
Updates
2 Control Registers Allow Complete Control of Modes and
MemoryTransfers
Differential Output for Optimum Performance
112 dB Signal-to-Noise (Not Muted) at 48 kHz Sample Rate
(A-Weighted Stereo)
70 dB Stop-Band Attenuation
On-Chip Clickless Volume Control
Hardware and Software Controllable Clickless Mute
Digital De-emphasis Processing for 32 kHz, 44.1 kHz, and
48 kHz Sample Rates
Flexible Serial Data Port with Right-Justified, Left-Justified,
Ps Compatible, and DSP Serial Port Modes
Auxiliary Digital Input
Graphical Custom ProgrammingTools
44-Lead MQFP or 48-Lead Lt1FP Plastic Package
APPLICATIONS
2.0/2.1 Channel Audio Systems (Two Main Channels plus
Subwoofer)
Multimedia Audio
Automotive Sound Systems
Minicomponent Stereo
HomeTheater Systems (AC-3 Postprocessorl
Musical Instruments
ln-Seat Sound Systems (Aircraft, Motor Coaches)
GENERAL DESCRIPTION
The AD1954 is a complete M-bit single-chip 3-channel digital
audio playback system with built-in DSP functionality for speaker
equalization, dual-band compression/limiting, delay Compensa-
tion, and image enhancement.These algorithms can be used to
compensate for real-world limitations of speakers, amplifiers, and
listening environments, resulting in a dramatic improvement of
perceived audio quality.
The signal processing used in the AD1954 is comparable to that
found in high-end studio equipment. Most of the processing is
done in full 48-bit double-precision mode, resulting in very good
low-level signal performance and the absence of limit cycles or
idle tones. The compressor/limiter uses a sophisticated two-band
algorithm often found in high-end broadcast compressors.
(Continued on 9)
FUNCTIONAL BLOCK DIAGRAM
SERIAL DATA 4 a
OUTPUT ‘
SERIAL DATA 3 _ AUDIO DATA _
INPUTS MUX
MASTER CLOCK =
OUTPUT
MASTER _ MCLK _
CLOCK INPUTS MUX . fl/ills/ll/l,,')
AUX SERIAL _
DATA INPUT 7
SPI DATA 4 =
OUTPUT ‘ SERIAL CONTROL
3 INTERFACE _
SPI INPUT = '
AD1954
26 x 22
DSP CORE
DAC - L 7
DATA FORMAT: =
3.23 (SINGLE PRECISION)
3.45 (DOUBLE PRECISION)
_ = ANALOG
' DAC - R = OUTPUTS
V DAC - sw .."
_ DATA CAPTURE _ DIGITAL
' OUT - OUTPUT
RAM ROM
REV. A
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed byAnalog Devices for its
use, nor for any infringements of patents or other rights of third parties
that may result from its use. No license is granted by implication or other-
wise under any patent or patent rights ofAnalog Devices.Trademarks and
registered trademarks are the property of their respective companies.
One Technology Way, PO. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
Fax: 781/326-8703 © 2003 Analog Devices, Inc.All rights reserved.
ADIQ54
TABLE OF CONTENTS
FEATURES/APPLICATIONS ........................ 1 Interpolation Filters .............................. 18
GENERAL DESCRIPTION .......................... 1 SPI PORT ....................................... 19
FUNCTIONAL BLOCK DIAGRAM w.................. 1 Overview ...................................... 19
SPECIFICATIONS ................................. 3 SPI Address Decoding w........................... 20
ABSOLUTE MAXIMUM RATINGS v.................. 6 Control Register 1 ................................ 20
ORDERING GUIDE ................................ 6 Control Register 2 21
PIN CONFIGURATIONS ........................... 6 . w...............................
PIN FUNCTION DESCRIPTIONS .................... 7 Volume Registers ................................. 22
TYPICAL PERFORMANCE CHARACTERISTICS ....... 8 Parameter RAM Contents .......................... 22
GENERAL DESCRIPTION (continued from page I) ....... 9 Options for Parameter Updates ...................... 22
FEATURES ....................................... 9 Soft Shutdown Mechanism ......................... 22
PIN FUNCTIONS I............................... 10 Safeload Mechanism .............................. 24
SIGNAL PROCESSING ............................ 12 Summary of RAM Modes .......................... 24
Signal Processing Overview ......................... 12 SPI READ/WRITE DATA FORMATS ............... 24
Numeric Formats ................................ 12 INITIALIZATION ................................ 26
Coefficient Format ............................... 12 Power-Up Sequence .............................. 26
Internal DSP Signal Data Format .................... 12 Setting the Clock Mode ........................... 26
High-Pass Filter ................................. 13 Setting the Data and MCLK Input Selectors ............ 26
Biquad Filters ................................... 13 DATA CAPTURE REGISTERS ...................... 26
Volume ........................................ 14 SERIAL DATA INPUT PORT ....................... 29
Stereo Image Expander ............................ 14 Serial Data Input Modes .......................... 29
Delay ......................................... 15 DIGITAL CONTROL PINS ......................... 29
Main Compressor/Limiter .......................... 15 Mute ......................................... 29
RMS Time Constant .............................. 17 De-emphasis .................................... 29
RMS Hold Time ................................. 17 ANALOG OUTPUT SECTION ...................... 3O
RMS Release Rate ............................... 17 GRAPHICAL CUSTOM PROGRAMMING TOOLS ...... 31
Look-Ahead Delay ............................... 17 APPENDIX ...................................... 32
Postcompression Gain ............................. 17 Cookbook Formulae for Audio EQ Biquad Coefficients . . .32
Subwoofer Compressor/Limiter ...................... 17 OUTLINE DIMENSIONS .......................... 33
De-emphasis Filtering ............................ 18 Revision History ................................... 34
Using the Sub Reiniection Paths for Systems with
No Subwoofer .................................. 18
-2- REV. A
A01M4-SPEillFliWl01G
Test conditions, unless otherwise noted.
Supply Voltages (AVDD, DVDD) 5.0V
Ambient Temperature 25°C
Input Clock 12.288 MHz
Input Signal 1.000 kHz 0 dB Full Scale
Input Sample Rate 48 kHz
Measurement Bandwidth 20 Hz to 20 kHz
Word Width 24 Bits
Load Capacitance 2200 pF
Load Impedance 2.74 kft
Input Voltage High 2.1 V
Input Voltage Low 0.8 V
ANALOG PERFORhjWi0ly'
Parameter Min Typ Max Unit
RESOLUTION 24 Bits
SIGNAL-TO-NOISE RATIO (20 Hz to 20 kHz) (Left/Right Output)
No Filter (Stereo) 109 dB
With A-Weighted Filter 1 12 dB
DYNAMIC RANGE (20 Hz to 20 kHz, -60 dB Input) (Left/Right Output)
No Filter 109 dB
With A-Weighted Filter 108 1 12 dB
TOTAL HARMONIC DISTORTION PLUS NOISE (Left/Right Output)
Vo = -0.5 dB -93 -100 dB
SIGNAL-TO-NOISE RATIO (20 Hz to 20 kHz) (Subwoofer Output)
No Filter (Stereo) 104 dB
With A-Weighted Filter 107 dB
DYNAMIC RANGE (20 Hz to 20 kHz, -60 dB Input) (Subwoofer Output)
No Filter 104 dB
With A-Weighted Filter 104 107 dB
TOTAL HARMONIC DISTORTION PLUS NOISE (Subwoofer Output)
Vo = -0.5 dB -90 -96 dB
ANALOG OUTPUTS
Differential Output Range (k Full Scale) (Left/Right Output) 2.74 V p-p
Differential Output Range (i Full Scale) (Subwoofer Output) 2.77 V p-p
CMOUT 2.50 V
DC ACCURACY
Gain Error (Left/Right Channel) -5 +5 %
Gain Error (Subwoofer Channel) -8 +8 %
Interchannel Gain Mismatch -0.250 +0.250 dB
Gain Drift 150 ppm/°C
DC Offset -30 +30 mV
INTERCHANNEL CROSSTALK (EIAJ Method) -120 dB
INTERCHANNEL PHASE DEVIATION $0.1 Degrees
MUTE ATTENUATION -107 dB
DE-EMPHASIS GAIN ERROR i0.1 dB
'Performance of right and left channels are identical (exclusive of the Interchannel Gain Mismatch and Interchannel Phase Deviation specifications).
Specifications subject to change without notice.
REV. A -3-
A01954
SPECIFICATIONS (continued)
DIGITAL I/il
Parameter Min Typ Max Unit
Input Voltage High (Vm) 2.1 V
Input Voltage High (V m) - RESETB 2.25 V
Input Voltage Low (Va) 0.8 V
Input Leakage (Im @VIH = 2.1 V) 10 pA
Input Leakage " @VIL = 0.8 V) 10 pA
High Level OutputVoltage (VOH), 10H = 2 mA DVDD - 0.5 V
Low Level Output Voltage (VOL), lor, = 2 mA 0.4 V
Input Capacitance 20 pF
Specifications subject to change without notice.
Parameter Min Typ Max Unit
SUPPLIES*
Voltage, Analog and Digital 4.5 5 5.5 V
Analog Current 42 48 mA
Analog Current, Power-Down 40 46 mA
Digital Current 65 75 mA
Digital Current, SPI Power-Down 6 10 mA
Digital Current, Reset Power-Down 53 61 mA
DISSIPATION
Operation, Both Supplies 510 mW
Operation, Analog Supplies 210 mW
Operation, Digital Supplies 325 mW
SPI Power-Down, Both Supplies 230 mW
Reset Power-Down, Both Supplies 465 mW
POWER SUPPLY REIECTION RATIO
1 kHz 300 mV p-p Signal at Analog Supply Pins -80 dB
20 kHz 300 mV p-p Signal at Analog Supply Pins -80 dB
'ODVDD current is dependent on load capacitance and clock rate.
Specifications subject to change without notice.
Parameter Min Typ Max Unit
Specifications Guaranteed 25 °C
Functionality Guaranteed -40 + 105 °C
Storage -55 +125 ''C
Specifications subject to change without notice.
REV. A
