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Programmable Sine Wave Generator with Amplitude Modulation

Hello there,

I was wondering if there was a single chip or 2 chip solution for a single channel 12-bit (or greater) DAC or DDS arbitrary which has all of the following features:

1. Be more than 10-bits.

2. Handle an output frequency range of 0.1Hz to 1kHz, this is not a very high frequency application.

3. Have the ability to ramp-up and ramp-down, or have the ability to do some sort of amplitude modulation.

4. Have SPI/I2C

5. (if available) has internal memory for a sin wave or an arbitrary waveform. I do not want to occupy the main MCU just for generating the wave.

6. Be less than 100mW (it is not an RF application, it is a biomedical application).

Don't mean to pull up competition, but the closest I have found to this (even though it is much faster than what I need) is the AD9102 from Analog Devices.

Thanks a lot!

Ashwati

  • Hi,

    As of now we don't have any device with DDS functionality with DAC. However we are coming with new device which has NVM and arbitrary function generation capability. I don't know your time lines  for your project. We will be releasing these devices towards first quarter of the next year.

    As of now I can suggest precision DAC's with 12 to 14bits which can easily generate these sine waves with the help of MCU.

    Let me know your thoughts on the same. If you are choosing DAC path, We will be happy to help you with appropriate device for your application.

    Regards,

    AK

  • Hello Akhilesh,

    Thank you for your response. We are right now only evaluating different parts of the design. We are aiming for small volumes in January 2021, larger volumes a little later.

    The issue is that we have already expanded our design from one MCU to 2 MCUs because of WiFi/BLE issues, and adding another one, or over-utilizing these just for waveform generation, is not an option.

    Do you think it is possible to get an evaluation board of this new chip? We would like to see if it will work well with the rest of our system, which right now comprises of all TI chips. I am happy to take the discussion of this possibility offline if a sample evaluation board is an option.

    Thanks!
    Ashwati

  • Hi,

    EVM is not ready as of now. Probably by the end of Dec we will have EVM for this device.

    Let me know if you need more help here.

    Regards,

    AK