AD1938:  4 ADC/8 DAC with PLL, 192 kHz, 24-Bit CODEC

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 ...More

AD1938:  4 ADC/8 DAC with PLL, 192 kHz, 24-Bit CODEC

Product 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 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.

Applications

  • Automotive audio systems
  • Home Theater Systems
  • Set-top boxes
  • Digital audio effects processors

    • 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
    • Please see data sheet for additional features

    Diagrams

    AD1938 Diagram
    Functional Block Diagram for AD1938

    Specifications

    # ADC 4
    # DAC 8
    ADC Dynamic Range (dB) 107dB
    ADC SNR (dB) 107dB
    DAC Dynamic Range (dB) 108dB
    DAC SNR (dB) 108dB
    THD+N (dB) ADC: -94,DAC: -94
    Product Description 192 kHz 24-bit CODEC w/ PLL

    Explore Other Products

    ADAU1361 - Stereo, Low Power, 96 kHz, 24-Bit Audio Codec with Integrated PLL

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    Part# # ADC # DAC ADC Dynamic Range (dB) DAC Dynamic Range (dB) ADC SNR (dB) DAC SNR (dB) THD+N (dB) Product Description Price* (1000-4999)
    AD1936 4 8 107 106 107 106 ADC: -92, DAC: -92 192 kHz, 24-Bit CODEC with PLL, Single-Ended Output, I2C Control -
    AD1937 4 8 107 109 107 109 ADC: -94, DAC: -94 192 kHz, 24-Bit CODEC with PLL, Differential Output, I2C Control $7.63
    ADAU1361 2 2 99 101 99 101 ADC: -90, DAC: -92 Stereo, Low Power, 96 kHz, 24-Bit Audio Codec with Integrated PLL $2.88
    SSM2602 2 2 - - 90 100 - Low Pwr, 192 kHz, 24-Bit CODEC w/ mic Bias, I2C and SPI Interface -
    AD1836A 4 6 105 108 105 108 ADC: -95, DAC: -95 4 ADC, 6 DAC, 24-Bit, 96 kHz, Multibit Sigma-Delta CODEC $7.68
    AD1938 4 8 107 108 107 108 ADC: -94, DAC: -94 192 kHz 24-bit CODEC w/ PLL $7.14
    AD1939 4 8 107 112 107 - ADC: -96, DAC: -94 High Performance Multibit Sigma Delta CODEC. $7.72
    AD73322 2 2 - - 78 77 ADC: -84, DAC: -80 Dual-Channel, 3 V Front-End Processor for General Purpose Apps Including Speech and Telephony -
    AD73322L 2 2 - - 78 78 ADC: -84, DAC: -80 Dual-Channel, 3 V Front-End Processor for General Purpose Apps Including Speech and Telephony $4.86
    ADAV803 2 2 102 101 102 101 ADC: -88, DAC: -91 Audio Codec for Recordable DVD $8.29
    ADAV801 2 2 102 101 102 101 ADC: -88, DAC: -91 Audio Codec for Recordable DVD $6.74
    AD1839A 2 6 105 108 105 108 ADC: -95, DAC: -95 96 kHz, 24-bit Sigma-Delta CODEC -
    AD1838A 2 6 105 108 105 108 ADC: -95, DAC: -95 96 kHz, 24-bit Sigma-Delta CODEC $8.80
    AD1837A 2 8 105 108 105 108 ADC: -95, DAC: -95 96 kHz, 24-bit Sigma-Delta CODEC -
    AD1835A 2 8 105 108 105 108 ADC: -95, DAC: -95 96 kHz, 24-bit Sigma Delta CODEC $9.15
    AD73311L 1 1 - - 76 77 ADC: -83, DAC: -70 Single-Channel, 3 V and 5 V Front-End Processor for Gen Purp Apps Including Speech and Telephony $2.69
    AD73311 1 1 - - 75 70 ADC: -83, DAC: -70 Single-Channel, 3 V and 5 V Front-End Processor for Gen Purp Apps Including Speech and Telephony $4.17
    AD74111 1 1 85 93 77 89 ADC: -67, DAC: -88 Low Cost Mono Audio Codec $2.69

    * The pricing listed here is provided only for budgetary purposes as recommended list price in U.S. Dollars in the United States ex factor per unit for the stated volume. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
    ** Pricing is currently unavailable. Click on the product number to see the Product Page for additional information.

    Pricing, Packaging & Availability

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    *The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
    **Sample availability may be better than production availability. Please enter samples into your cart to check sample availability.

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