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ASDATA1 Datasheet(PDF) 1 Page - Analog Devices |
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ASDATA1 Datasheet(HTML) 1 Page - Analog Devices |
1 / 32 page 4 ADC/8 DAC with PLL, 192 kHz, 24-Bit Codec Data Sheet AD1939 Rev. E Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorother rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.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 FEATURES PLL generated or direct master clock Low EMI design 112 dB DAC/107 dB ADC 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 Differential ADC input Differential 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 input/output 64-lead LQFP package Qualified for automotive applications APPLICATIONS Automotive audio systems Home Theater Systems Set-top boxes Digital audio effects processors GENERAL DESCRIPTION The AD1939 is a high performance, single-chip codec that provides four analog-to-digital converters (ADCs) with differential input, and eight digital-to-analog converters (DACs) with differential 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 AD1939 operates from 3.3 V digital and analog supplies. The AD1939 is available in a 64-lead (differential output) LQFP package. The AD1939 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 AD1939 eliminates 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 FILTER SERIAL DATA PORT DIGITAL AUDIO INPUT/OUTPUT PRECISION VOLTAGE REFERENCE TIMING MANAGEMENT AND CONTROL (CLOCK AND PLL) SPI CONTROL PORT CONTROL DATA INPUT/OUTPUT AD1939 ADC ADC ADC ADC ANALOG AUDIO INPUTS ANALOG AUDIO OUTPUTS DAC DAC DAC DAC DAC DAC DAC DAC DIGITAL FILTER AND VOLUME CONTROL SDATA OUT SDATA IN CLOCKS Figure 1. |
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