900,000+ datasheet pdf search and download

Datasheet4U offers most rated semiconductors data sheet pdf




Analog Devices Semiconductor Electronic Components Datasheet

AD1938 Datasheet

4 ADC / 8 DAC

No Preview Available !

Data Sheet
4 ADC/8 DAC with PLL,
192 kHz, 24-Bit Codec
AD1938
FEATURES
PLL generated or direct master clock
Low EMI design
108 dB DAC/107 dB ADC dynamic range and SNR
−94 dB THD + N
3.3 V single 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-justified, and TDM modes
Master and slave modes up to 16-channel input/output
48-lead LQFP package
Qualified for automotive applications
APPLICATIONS
Automotive audio systems
Home Theater Systems
Set-top boxes
Digital audio effects processors
GENERAL DESCRIPTION
The AD1938 is a high performance, single-chip codec that pro-
vides four analog-to-digital converters (ADCs) with 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 AD1938 operates from 3.3 V digital and analog supplies.
The AD1938 is available in a 48-lead (single-ended output)
LQFP package. Other members of this family include a diffe-
rential DAC output and I2C® control port version.
The AD1938 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 AD1938 elimi-
nates the need for a separate high frequency master clock and
can also be used with a suppressed bit clock. The DACs and
ADCs are designed using the latest Analog Devices 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
ANALOG
AUDIO
INPUTS
AD1938
SERIAL DATA PORT
ADC
ADC
ADC
ADC
DIGITAL
FILTER
SDATA
OUT
SDATA
IN
CLOCKS
TIMING MANAGEMENT
AND CONTROL
(CLOCK AND PLL)
DIGITAL
FILTER
AND
VOLUME
CONTROL
PRECISION
VOLTAGE
REFERENCE
SPI CONTROL PORT
DAC
DAC
DAC
DAC
DAC
DAC
DAC
DAC
ANALOG
AUDIO
OUTPUTS
CONTROL DATA
INPUT/OUTPUT
Figure 1.
Rev. E
Document Feedback
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevices for itsuse,nor foranyinfringementsofpatentsor 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 ©2006–2013 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com


Analog Devices Semiconductor Electronic Components Datasheet

AD1938 Datasheet

4 ADC / 8 DAC

No Preview Available !

AD1938
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........................................... 5
Power Supply Specifications........................................................ 5
Digital Filters................................................................................. 6
Timing Specifications .................................................................. 7
Absolute Maximum Ratings............................................................ 8
Thermal Resistance ...................................................................... 8
ESD Caution.................................................................................. 8
Pin Configuration and Function Descriptions............................. 9
Typical Performance Characteristics ........................................... 11
Theory of Operation ...................................................................... 13
REVISION HISTORY
2/13—Rev. D to Rev. E
Change to tCLH Parameter, Table 7 .................................................. 7
7/11—Rev. C to Rev. D
Changes to Table 10, DSDATAx/ASDATAx Pin Descriptions... 9
1/11—Rev. B to Rev. C
Added Automotive Information ................................. Throughout
Change to Table 2, Introductory Text ............................................ 4
Change to Table 4, Introductory Text ............................................ 5
Change to Table 7, Introductory Text ............................................ 7
Changes to Ordering Guide .......................................................... 31
8/09—Rev. A to Rev. B
Changes to Table 16 Title............................................................... 24
Changes to Figure 18 and Table 19 Titles.................................... 25
Changes to Table 20 Title............................................................... 26
Changes to Table 23 and Table 24 Titles...................................... 27
Changes to Table 25 Title............................................................... 28
Changes to Ordering Guide .......................................................... 31
Data Sheet
Analog-to-Digital Converters (ADCs).................................... 13
Digital-to-Analog Converters (DACs) .................................... 13
Clock Signals............................................................................... 13
Reset and Power-Down ............................................................. 14
Serial Control Port ..................................................................... 14
Power Supply and Voltage Reference....................................... 15
Serial Data Ports—Data Format............................................... 15
Time-Division Multiplexed (TDM) Modes............................ 15
Daisy-Chain Mode ..................................................................... 19
Control Registers ............................................................................ 24
Definitions................................................................................... 24
PLL and Clock Control Registers............................................. 24
DAC Control Registers .............................................................. 25
ADC Control Registers.............................................................. 27
Additional Modes....................................................................... 29
Applications Circuits...................................................................... 30
Outline Dimensions ....................................................................... 31
Ordering Guide .......................................................................... 31
7/08—Rev. 0 to Rev. A
Changes to Table 7.............................................................................7
Changes to Figure 2...........................................................................9
Changes to Table 10 ..........................................................................9
Changes to Clock Signals Section ................................................ 13
Changes to Reset and Power-Down Section............................... 14
Change to Serial Control Port Section ........................................ 14
Changes to Table 11 ....................................................................... 14
Changes to Figure 24 and Figure 25 ............................................ 22
Changes to Figure 26...................................................................... 23
Changes to Definitions Section .................................................... 24
Changes to Table 16 ....................................................................... 24
Change to Additional Modes Section.......................................... 29
Change to Figure 30 ....................................................................... 30
5/06—Revision 0: Initial Version
Rev. E | Page 2 of 32


Part Number AD1938
Description 4 ADC / 8 DAC
Maker Analog Devices
Total Page 30 Pages
PDF Download

AD1938 Datasheet PDF

View PDF for Mobile








Similar Datasheet

1 AD1933 8-Channel DAC
Analog Devices
2 AD1934 8-Channel DAC
Analog Devices
3 AD1935 (AD1935 - AD1939) 4 ADC/8 DAC
Analog Devices
4 AD1936 (AD1935 - AD1939) 4 ADC/8 DAC
Analog Devices
5 AD1937 (AD1935 - AD1939) 4 ADC/8 DAC
Analog Devices
6 AD1938 4 ADC / 8 DAC
Analog Devices
7 AD1939 4 ADC/8 DAC
Analog Devices





Part Number Start With

0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F    G    H    I    J    K    L    M    N    O    P    Q    R    S    T    U    V    W    X    Y    Z

Site map

Webmaste! click here

Contact us

Buy Components

Privacy Policy