AD1955ARS ,High Performance, Multibit Sigma-Delta DAC with SACD PlaybackFEATURES FUNCTIONAL BLOCK DIAGRAM5 V Power Supply Stereo Audio DAC SystemDSDAccepts 16-/18-/20-/24- ..
AD1955ARSZ ,High Performance, Multibit Sigma-Delta DAC with SACD PlaybackSPECIFICATIONSTEST CONDITIONS(Unless otherwise noted.)Analog Supply Voltages (AV ) . . . . . . . . ..
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 ..
AD1959YRS ,PLL/Multibit DACSPECIFICATIONSTEST CONDITIONS UNLESS OTHERWISE NOTEDSupply Voltages (AVDD, DVDD) 5.0 VAmbient Tempe ..
AD1959YRSRL ,PLL/Multibit DACSpecifications subject to change without notice.DIGITAL TIMING (Guaranteed over –40°C to +105°C, AV ..
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 ..
AD8367ARU-REEL7 ,500 MHz, Linear-in-dB VGA with AGC DetectorSPECIFICATIONS unless otherwise noted.)Parameter Conditions Min Typ Max UnitOVERALL FUNCTIONFrequen ..
AD8367ARUZ-RL7 , 500 MHz, Linear-in-dB VGA with AGC Detector
AD8369ARU ,45 dB Digitally Controlled VGA LF to 600 MHzAPPLICATIONSINHICellular/PCS Base StationsIF Sampling ReceiversCMDCFixed Wireless AccessINLOWirelin ..
AD8370AREZ , LF to 750 MHz, Digitally Controlled VGA
AD8375ACPZ-R7 , Ultralow Distortion IF VGA
AD1955ARS-AD1955ARSZ
High Performance, Multibit Sigma-Delta DAC with SACD Playback
REV.0
High Performance Multibit �-� DAC
with SACD Playback
FEATURES
5 V Power Supply Stereo Audio DAC System
Accepts 16-/18-/20-/24-Bit Data
Supports 24-Bit, 192 kHz Sample Rate PCM Audio Data
Supports SACD Bit Stream and External Digital Filter
Interface
Accepts a Wide Range of PCM Sample Rates Including:kHz, 44.1kHz, 48kHz, 88.2kHz, 96kHz, and
192kHz
Multibit Sigma-Delta Modulator with "Perfect Differen-
tial Linearity Restoration" for Reduced Idle Tones and
Noise Floor
Data Directed Scrambling DAC––Low Sensitivity to Jitter
Supports SACD Playback with "Bit Expansion" Filter
Differential Current Output for Optimum Performance
8.64 mA p-p Differential Output
120 dB SNR/DNR (not muted) at 48 kHz Sample Rate
(A-Weighted Stereo)
123 dB SNR/DNR (Mono)
–110 dB THD + N
110 dB Stop-Band Attenuation with �0.0002 dB
Pass-Band Ripple
8� Oversampling Digital Filter
On-Chip Clickless Volume Control
Supports SACD-Mute Pattern Detection
Supports 64 fS/128 fS DSD SACD with Phase Mode
Internal Digital Filter Pass-Through for External Filter
Master Clock: 256 fS, 512 fS, 768 fS
Hardware and Software Controllable Clickless Mute
Serial (SPI) Control for Serial Mode, Number of Bits,
Sample Rate, Volume, Mute, De-Emphasis, Mono Mode
Digital De-Emphasis for 32 kHz, 44.1 kHz, and 48 kHz
Sample Rates
Flexible Serial Data Port with Right-Justified, Left-
Justified, I2S, and DSP Modes
28-Lead SSOP Plastic Package
APPLICATIONS
High End DVD Audio
SACD
Home Theater Systems
Automotive Audio Systems
Sampling Musical Keyboards
Digital Mixing Consoles
Digital Audio Effects Processors
FUNCTIONAL BLOCK DIAGRAM
MASTER
CLOCK INPUT
CONTROL
DATA INPUT
DSD
BITSTREAM
INPUT
16-/20-/24-BIT
AUDIO DATA/
EXTERNAL
DIGITAL
FILTER INPUTY
L-CHR-CH
DIFFERENTIAL
CURRENT OUTPUT
PRODUCT OVERVIEWThe AD1955 is a complete, high performance, single-chip, stereo
digital audio playback system. It is comprised of a multibit sigma-
delta modulator, high performance digital interpolation filters,
and continuous-time differential current output DACs. Other
features include an on-chip clickless stereo attenuator and mute
capability, programmed through an SPI compatible serial control
port. The AD1955 is fully compatible with all known DVD audio
formats including 192kHz as well as 96kHz sample frequencies
and 24 bits. It is also backward compatible by supporting 50µs/µs digital de-emphasis intended for “redbook” compact discs,
as well as de-emphasis at 32kHz and 48kHz sample rates.
The AD1955 has a very flexible serial data input port that
allows for glueless interconnection to a variety of ADCs, DSPs,
SACD decoders, external digital filters, AES/EBU receivers, and
(continued on page 12)
AD1955–SPECIFICATIONS
ANALOG PERFORMANCEOut-of-Band Energy (0.5 � fS to 100 kHz)
Interchannel Crosstalk (EIAJ Method)
Interchannel Phase Deviation
Mute Attenuation
*Measured with Audio Precision System Two Cascade in RMS Mode. Averaging Mode will show approximately 2 dB better performance.
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.
TEST CONDITIONS(Unless otherwise noted.)
Analog Supply Voltages (AVDD) . . . . . . . . . . . . . . . . . . . . 5 V
Digital Supply Voltages (DVDD) . . . . . . . . . . . . . . . . . . . . 5 V
Reference Current (IREF) . . . . . . . . . . . . . . . . . . . . . 0.960 mA
Ambient Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . 25°C
Input Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12.288 MHz
Input Signal . . . . . . . . . . . . . . . . .984.375 Hz, 0 dB Full Scale
Input Sample Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 kHz
Measurement Bandwidth . . . . . . . . . . . . . . . . 20 Hz to 20 kHz
Word Width . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Bits
Load Capacitance . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 pF
Load Impedance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 kΩ
Input Voltage HI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.4 V
Input Voltage LO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.8 V
(See figures. IREF = 0.960 mA, VBIAS = 2.80 V.)
AD1955
DIGITAL I/O(–40�C to +85�C, unless otherwise noted.)Input Voltage LO (VIL)
Input Leakage (IIH @ VIH = 2.4 V)
Low Level Output Voltage (VOL) IOL = 1 mA
Specifications subject to change without notice.
TEMPERATURESpecifications subject to change without notice.
POWERPOWER SUPPLY REJECTION RATIO
Specifications subject to change without notice.
DIGITAL FILTER CHARACTERISTICSSpecifications subject to change without notice.
AD1955
SPECIFICATIONS (continued)
GROUP DELAYINT8� Mode
INT4� Mode
Specifications subject to change without notice.
DIGITAL TIMING(Guaranteed over –40�C to +85�C, AVDD = DVDD = 5.0 V � 10%.)tDMH
tDBH
Specifications subject to change without notice.
CAUTIONESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000V readily
accumulate on the human body and test equipment and can discharge without detection. Although the
AD1955 features proprietary ESD protection circuitry, permanent damage may occur on devices
subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended
to avoid performance degradation or loss of functionality.
PIN CONFIGURATION
ABSOLUTE MAXIMUM RATINGS*AVDD to AGND
Digital Inputs
Reference Voltage
*Stresses greater than those listed under Absolute Maximum Ratings may cause
permanent damage to the device. This is a stress rating only; functional operation
of the device at these or any other conditions above those indicated in the
operational section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.
PACKAGE CHARACTERISTICS�JC (Thermal Resistance
ORDERING GUIDE*RS = Shrink Small Outline Package
