4 ADC/8 DAC with PLL, 192 kHz, 24-Bit Codec Data Sheet AD1939 FEATURES GENERAL DESCRIPTION PLL generated or direct master clock The AD1939 is a high performance, single-chip codec that Low EMI design provides four analog-to-digital converters (ADCs) with 112 dB DAC/107 dB ADC dynamic range and SNR differential input, and eight digital-to-analog converters (DACs) 94 dB THD + N with differential output using the Analog Devices, Inc. patented Single 3.3 V supply multibit sigma-delta (-) architecture. An SPI port is included, Tolerance for 5 V logic inputs allowing a microcontroller to adjust volume and many other Supports 24-bits and 8 kHz to 192 kHz sample rates parameters. The AD1939 operates from 3.3 V digital and analog Differential ADC input supplies. The AD1939 is available in a 64-lead (differential Differential DAC output output) LQFP package. Log volume control with autoramp function The AD1939 is designed for low EMI. This consideration is SPI controllable for flexibility apparent in both the system and circuit design architectures. Software-controllable clickless mute By using the on-board PLL to derive the master clock from the Software power-down 2 LR clock or from an external crystal, the AD1939 eliminates Right-justified, left-justified, I S, and TDM modes the need for a separate high frequency master clock and can Master and slave modes up to 16-channel input/output also be used with a suppressed bit clock. The DACs and ADCs 64-lead LQFP package are designed using the latest Analog Devices continuous time Qualified for automotive applications architectures to further minimize EMI. By using 3.3 V supplies, power consumption is minimized, further reducing emissions. APPLICATIONS Automotive audio systems Home Theater Systems Set-top boxes Digital audio effects processors FUNCTIONAL BLOCK DIAGRAM DIGITAL AUDIO INPUT/OUTPUT AD1939 SERIAL DATA PORT DAC DAC SDATA SDATA ADC DAC OUT IN DIGITAL ANALOG ADC CLOCKS FILTER DAC ANALOG DIGITAL AUDIO AND AUDIO FILTER INPUTS VOLUME OUTPUTS ADC DAC CONTROL TIMING MANAGEMENT AND CONTROL DAC ADC (CLOCK AND PLL) DAC DAC SPI PRECISION CONTROL PORT VOLTAGE REFERENCE CONTROL DATA INPUT/OUTPUT Figure 1. Rev. E Document Feedback 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 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. No Tel: 781.329.4700 20062013 Analog Devices, Inc. All rights reserved. license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Technical Support www.analog.com Trademarks and registered trademarks are the property of their respective owners. 06071-001AD1939 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Analog-to-Digital Converters (ADCs) .................................... 13 Applications ....................................................................................... 1 Digital-to-Analog Converters (DACs) .................................... 13 General Description ......................................................................... 1 Clock Signals ............................................................................... 13 Functional Block Diagram .............................................................. 1 Reset and Power-Down ............................................................. 14 Revision History ............................................................................... 2 Serial Control Port ..................................................................... 14 Specifications ..................................................................................... 3 Power Supply and Voltage Reference ....................................... 15 Test Conditions ............................................................................. 3 Serial Data PortsData Format ............................................... 15 Analog Performance Specifications ........................................... 3 Time-Division Multiplexed (TDM) Modes ............................ 15 Crystal Oscillator Specifications................................................. 4 Daisy-Chain Mode ..................................................................... 19 Digital Input/Output Specifications........................................... 5 Control Registers ............................................................................ 24 Power Supply Specifications........................................................ 5 Definitions ................................................................................... 24 Digital Filters ................................................................................. 6 PLL and Clock Control Registers ............................................. 24 Timing Specifications .................................................................. 6 DAC Control Registers .............................................................. 25 Absolute Maximum Ratings ............................................................ 8 ADC Control Registers .............................................................. 27 Thermal Resistance ...................................................................... 8 Additional Modes ....................................................................... 29 ESD Caution .................................................................................. 8 Application Circuits ....................................................................... 30 Pin Configuration and Function Descriptions ............................. 9 Outline Dimensions ....................................................................... 31 Typical Performance Characteristics ........................................... 11 Ordering Guide .......................................................................... 31 Theory of Operation ...................................................................... 13 Automotive Products ................................................................. 31 REVISION HISTORY 2/13Rev. D to Rev. E Changes to Ordering Guide .......................................................... 31 6/07Rev. 0 to Rev. A Change to tCLH Parameter, Table 7 ................................................... 7 2 Deleted I C References....................................................... Universal Changes to Serial Control Port Section ........................................ 14 Change to Figure 1 ............................................................................ 1 7/11Rev. C to Rev. D Changes to Figure 2 ........................................................................... 9 Changes to Table 10 .......................................................................... 9 Changes to Pin 15, Pin 18, Pin 19, and Pin 20 Descriptions ...... 9 Changes to Table 11 ....................................................................... 14 Changes to Pin 26 and Pin 27 Descriptions ................................ 10 Changes to Table 12 ....................................................................... 16 Changes to Figure 24 and Figure 25............................................. 22 9/10Rev. B to Rev. C Changes to Table 13 ....................................................................... 23 Added Qualified for Automotive Applications to the Features Change to Figure 26 ....................................................................... 23 Section ................................................................................................ 1 Changes to Table 15 and Table 16 ................................................ 24 Changed Case Temperature from 130C to 125C ...................... 4 Changes to Figure 27 and Figure 28............................................. 29 Changed T from 40C to +130C to 40C to +105C ........... 5 Change to Figure 30 ....................................................................... 30 A Changed T from 40C to +130C to 40C to +105C ........... 7 A Updated Outline Dimensions ....................................................... 31 Changes to Ordering Guide .......................................................... 31 Changes to Ordering Guide .......................................................... 31 Added Automotive Products Section .......................................... 31 7/06Revision 0: Initial Version 3/10Rev. A to Rev. B Rev. E Page 2 of 32