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AD1939

Analog Devices
Part Number AD1939
Manufacturer Analog Devices
Description 24-Bit CODEC
Published Dec 6, 2006
Detailed Description www.DataSheet4U.com 4 ADC/8 DAC with PLL, 192 kHz, 24-Bit CODEC AD1939 FEATURES PLL generated or direct master clock Lo...
Datasheet PDF File AD1939 PDF File

AD1939
AD1939

Overview
www.
DataSheet4U.
com 4 ADC/8 DAC with PLL, 192 kHz, 24-Bit CODEC AD1939 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 in/out 64-lead LQFP package 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 digital-to-analog and analog-to-digital converters are designed using the latest ADI continuous time 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 ADC ANALOG AUDIO INPUTS ADC ADC ADC DIGITAL FILTER SDATA OUT SDATA IN CLOCKS TIMING MANAGEMENT AND CONTROL ...


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