AD1938
PRODUCTION4 ADC/8 DAC with PLL, 192 kHz, 24-Bit CODEC
- Part Models
- 4
- 1ku List Price
- Starting From $6.03
Part Details
- PLL generated or direct master clock
- Low EMI design
- 108 dB DAC/107 dB ADC dynamic range and SNR
- −94 dB THD + N
- Log volume control with autoramp function
- 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
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
Documentation
Data Sheet 1
User Guide 2
Application Note 2
Evaluation Design File 1
Device Drivers 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| AD1938WBSTZ | 48-Lead LQFP (7mm x 7mm) | ||
| AD1938WBSTZ-RL | 48-Lead LQFP (7mm x 7mm) | ||
| AD1938YSTZRL | 48-Lead LQFP (7mm x 7mm) | ||
| SB1938WBSTZ-RL | 48-Lead LQFP (7mm x 7mm) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Feb 9, 2024 - 24_0012 Addition of Analog Devices, Ireland as an Alternate Fab Site 0.35um Process |
||
| AD1938WBSTZ | PRODUCTION | |
| AD1938WBSTZ-RL | PRODUCTION | |
| AD1938YSTZRL | ||
|
Dec 21, 2020 - 20_0188 Addition of Polyimide for AD1938 |
||
| AD1938WBSTZ | PRODUCTION | |
| AD1938WBSTZ-RL | PRODUCTION | |
| AD1938YSTZRL | ||
|
Dec 7, 2016 - 16_0033 Assembly Relocation to Stats ChipPAC Jiangyin and Test Transfer to Stats ChipPAC Singapore of Select QFP Products |
||
| AD1938WBSTZ | PRODUCTION | |
| AD1938WBSTZ-RL | PRODUCTION | |
| AD1938YSTZRL | ||
|
Jan 5, 2009 - 07_0077 Certification of STATSChipPAC Shanghai, China and AMKOR Philippines as additional sources for Assembly & Test of QFP Packages |
||
| AD1938YSTZRL | ||
This is the most up-to-date revision of the Data Sheet.
Software Resources
Device Drivers 1
Automated Register Window Builder, Version 3.2.1
SigmaStudio®
Graphical development tool for programming, development, and tuning software for ADI DSP audio processors and A2B® transceivers.
View DetailsEvaluation Software 1
Tools & Simulations
IBIS Model 1
Evaluation Kits
ADUSB2EBZ Evaluation Board
Features and Benefits
EVAL-ADUSB2EBZ "USBi"
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Product Details
The Analog Devices USBi “USB Interface” (EVAL-ADUSB2EBZ) board is the interface between your PC's USB port and SigmaDSP hardware's data input pins. This interface can be used with any evaluation board which includes an External SPI/I²C header (Aardvark Header). The EVAL-ADUSB2EBZ board is capable of both SPI and I²C communication (which is user selectable) and can supply IOVDD of either 3.3V or 1.8V.The USBi interface is powered from the computer's USB port.
To Install the USBi Board:
- Connect the USB cable to the USBi Board a spare USB port on your PC.
- The Windows “Found New Hardware Wizard” will launch.
- Choose “Install from a list or a specific location” and click “Next”.
- Select “Search for the best driver in these locations” and Check the box for “Include this location in the search.”
- Press the “Browse” button and locate the appropriate driver file in the SigmaStudio application folder (default folder is C:\Program Files\Analog Devices Inc\Sigma Studio\USB drivers): Select the CyUSB.inf file.
- Click “Continue Anyway” if you're prompted with “This software has not passed Windows Logo testing.”
Using USBi in SigmaStudio:
To communication between SigmaStudio and the USBi board, a communication channel block must be added to the Schematic design. To locate the block, select the Hardware Configuration Tab, in the ToolBox or Tree ToolBox window choose the “Communication Channels” category, and select the USBi block.
This block provides connections for multiple processors (ICs / DSPs), allowing you to use multiple processors in a single design. This block allows you to explicitly specify both the communication protocol (SPI or I²C) and the part's address, I²C address or SPI catch line. The DSP hardware's address must match the block's selected address for communication to function properly. See the parts data sheet for more information about addressing (e.g. ADR_SEL, ADDR0, or ADDR1 pins). The default USBi protocol is I²C, to enable SPI, you must first select an SPI address in the block's drop down menu and then perform three write operations (e.g. press the write button the Register Read/Write Window 3 times). The USBi hardware has LEDs which indicate the current mode, I²C or SPI.
AD1938 Evaluation Board