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ADC for interfacing analog AC signal and Transmitter

Other Parts Discussed in Thread: ADS1013, ADS1015, ADS1018

Hello Members,

I want to interface an analog AC signal(frequency I Hz) and a  digital transmitter (RF transmitter 433 Mhz) using an ADC.Please suggest an appropriate ADC for this application.

Thanks & Regards,

BISNI

  • Bisni,


    To get a better idea of what you need, what exactly are you measuring? I know the input signal you want to capture is 1Hz, but what data rate do you want? What is the amplitude of the input signal? Does it have a particular common-mode voltage? What resolution or noise performance are you looking for?

    Do you have a particular RF transmitter that you are planning on using? In most cases, I don't think the ADC choice will matter to using an RF transmitter.


    Joseph Wu
  • First of all thank you Joseph for your reply.

    I am measuring a voltage signal.The amplitude of the signal 1V peak to peak+1.5V dc offset.10 bit resolution is needed.Regarding the transmitter,I have to use the Transmitter-Receiver shown in the link below
    www.icstation.com/433mhz-transmitter-receiver-arduino-project-p-1402.html

    In the receiver side Arduino Mega/UNOboard will be connected to the receiver and values will be obtained in the Serial monitor of the arduino IDE.I think an ADC with UART serial output will be more useful for this application.Please advise.


    Thanks & Regards,
    BISNI
  • Bisni,


    I'd use something simple. If you need something that's about 3kSPS or less, I'd recommend the ADS1015 or ADS1018. The ADS1015 uses I2C communications and the ADS1018 uses a form of SPI. Both are similar in functionality (the ADS1015 can be replaced by an ADS1013 when you only need one input channel.

    When you are ready to put this together, I would certainly recommend getting an oscilloscope or logic analyzer. It really helps to ensure that your communications are correct by looking at the output of one of these and comparing that with the timing diagrams shown in the datasheet.


    Joseph Wu
  • Thank you again Joseph.Could you please clarify that the above mentioned ADC output can directly connect to the RF transmitter data input?

  • Bisni,


    I don't know what the RF transmitter takes for data. However the ADS1015 and ADS1018 communicate to a controller with I2C and SPI respectively. There are two popular types of digital communication.

    I think that you'll need to program the Arduino to do the communications for either of these devices. I believe that you should be able to find some ADS1X15 code to do the I2C communications with the Arduino if you just search the internet.


    Joseph Wu
  • Actually I don't want to use arduino or any micro controller in the receiver.I am looking for a solution with out arduino or microcontroller in the Transmitter side.I tried using arduino in both side(transmitter and receiver side).It worked fine.Now I have to interface the analog signal and RF transmitter(digital transmitter) with out microcontroller.I thought I can do it with stand alone ADC by converting the analog signal to digital and giving it directly to transmitter.Is it possible ??Any suggestion other than ADC to interface the analog signal and digital transmitter.Please advise.
  • Bisni,


    We don't have any ADCs that connect directly to a wireless transmitter. You will always need some sort of microcontroller to communicate with either the ADC or the transmitter. Even in the transmitter you pointed out, it's designed to be connected to the Arduino. It still needs some sort of formatting to connect it up.

    Regardless, there will be some programming necessary to get connect all of this together.


    Joseph Wu
  • Thank You Joseph for the continuous feedback.So micro controller is necessary for interfacing  the analog signal and the RF transmitter.No other solution is available,right?

  • Bisni,


    That is correct. I don't know of any solution that as a direct connection from an ADC to an RF transmitter.


    Joseph Wu