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

Linux Driver

The AD1938 is a high performance, single-chip codec that provides 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 differential 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 and Benefits
  • PLL generated or direct master clock
  • Low EMI design
  • 108 dB DAC/107 dB ADC dynamic range and SNR
  • −94 dB THD + N
  • Linux Driver
  • 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
Audio & Video Products
Analog to Digital Converters
IBIS Models
Software & Systems Requirements
Data Sheets
Documentnote
AD1938: 4 ADC/8 DAC with PLL, 192 kHz, 24-Bit Codec Data Sheet (Rev. E)PDF 553 kB
Application Notes
Documentnote
AN-1365: AD1933/AD1934/AD1938/AD1939/AD1974 Boot Up Application (Rev. 0)PDF 895.98 K
AN-1006: Using the EVAL-ADUSB2EBZ (Rev. A)PDF 349 kB
User Guides
Documentnote
UG-087: Evaluating the AD1940 SigmaDSP Using the EVAL-AD1940MINIBZPDF 796 kB
UG-045: Evaluating the AD1938 Four ADC/Eight DAC with PLL 192 kHz, 24-Bit CodecPDF 1809 kB
Order Information
Part NumberPackagePacking QtyTemp RangePrice 100-499Price 1000+RoHS
AD1938WBSTZ Production48 ld LQFPOTH 250-40 to 105C5.264.21Y
AD1938WBSTZ-RL Production48 ld LQFPREEL 2000-40 to 105C04.21Y
AD1938YSTZ Production48 ld LQFPOTH 250-40 to 105C00Y
AD1938YSTZRL Production48 ld LQFPREEL 2000-40 to 105C00Y
Evaluation Boards
Part NumberDescriptionPriceRoHS
EVAL-AD1938AZEvaluation Board499Y
EVAL-ADUSB2EBZUSB Interface80Y
Reference Materials
AD1938: 4 ADC/8 DAC with PLL, 192 kHz, 24-Bit Codec Data Sheet (Rev. E) ad1938
AD1938 IBIS Model ad1934
Automated Register Window Builder ad1955
AN-1365:AD1933 / AD1934 / AD1938 / AD1939 / AD1974 引导应用 (Rev. 0) ad1934
AN-1365: AD1933/AD1934/AD1938/AD1939/AD1974 Boot Up Application (Rev. 0) ad1938
AN-1006: Using the EVAL-ADUSB2EBZ (Rev. A) ad1938
UG-087: Evaluating the AD1940 SigmaDSP Using the EVAL-AD1940MINIBZ ad1938
UG-045: Evaluating the AD1938 Four ADC/Eight DAC with PLL 192 kHz, 24-Bit Codec ad1938
Benchmarking Integrated Audio: Why CPU Usage Alone No Longer Predicts User... ad73311