EVAL-AD5766-SDZ

16-Channel, 16-Bit Voltage Output denseDAC

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Overview

The AD5766/AD5767 are 16-channel, 16-/12-bit, voltage output digital-to-analog converters (DAC). The DACs generate output voltage ranges from an external 2.5 V reference. Depending on the span selected, the mid-point of the output span can be adjusted allowing for a minimum output voltage as low as -20 V or a maximum output voltage of up to +14 V.

The AD5766/AD5767 have integrated output buffers which can sink or source up to 20 mA. This makes the devices suitable for Indium Phosphide Mach Zehnder Modulator (InP-MZM) biasing applications.

The part incorporates a power-on reset circuit that ensures that the DAC outputs power up to 0 V and remain at this level until the output range of the DAC is configured. The outputs of all DACs are updated through register configuration, with the added functionality of user-selectable DAC channels to be simultaneously updated.

The AD5766/AD5767 require four power supplies. AVCC is the analog supply for the low voltage DAC circuitry. AVDD and AVSS are the positive and negative high voltage power supplies for the output amplifiers. A VLOGIC supply pin is provided to set the logic levels for the digital interface pins.

The devices utilize a versatile 4-wire serial interface that operates at clock rates of up to 50 MHz for write mode and up to 10 MHz for readback and daisy-chain mode, and is compatible with SPI, QSPI, MICROWIRE, and DSP interface standards.

Features:

  • Complete 16-channel, 12/16-bit DACs

  • 8 software-programmable output ranges

  • Integrated reference buffers

  • Channel monitoring multiplexer

  • 1.8 V logic compatibility

  • Integrated DAC output buffers

Applications:

  • Mach Zehnder Modulator Bias Control

  • Analog Output Modules

  • Process Control

  • Optical Networking

  • Instrumentation

  • Industrial Automation

  • Data acquisition systems

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Recommendations

People who follow the flow that is outlined, have a much better experience with things. However, like many things, documentation is never as complete as it should be. If you have any questions, feel free to ask on our EngineerZone forums, but before that, please make sure you read our documentation thoroughly.

To better understand the AD5766 / AD5767, we recommend to use the EVAL-AD5766/67-SD2Z evaluation board.

Table of contents

  1. Using the evaluation board/full stack reference design that we offer:

    1. User Guide - what you need to know about the evaluation board

    2. Prerequisites - what you need to get started with the setup

    3. Quickstart:

      1. Using the ZedBoard

  2. Design with the AD5766/AD5767

  3. Help and Support

Block Diagram

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HDL Source Code

Software Support

Linux Device Driver

No-OS Driver

The AD5766 No-OS driver provides a platform-independent software layer for controlling the AD5766/AD5767 DACs from bare-metal applications.

Source code:

More Information

Support

Analog Devices will provide limited online support for anyone using the reference design with Analog Devices components via the FPGA Reference Designs Forum.