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Original question:

ADS1262: Analog Input voltage Range

ADS1262: ADS1262_single_ended_0-5Vdc

Massimo Nannizzi
Prodigy 20 points
Part Number: ADS1262


Hello,

I wish to use ADS1262 to acquire 10 input signal, 0-5 Vdc: is it possible using internal reference or I need to use an external one?

If yes, can you help me with suggestions on configuration?

Kind regards.

  • 0
    TI__Mastermind 46235 points

    Hi Massimo,

    The internal voltage reference on this ADC can be used for your single-ended input. Please see the details in 10.1.2 section and the block diagram below for the connection and configuration.

    By default, the internal voltage reference has been selected in REFMUX and POWER registers, you have to select the input channels for a conversion in INPMUX register, also select data rate in MODE2 register, digital filter in MODE1 register, and the conversion mode (Continuous or Pulse) in MODE0 register, then use START control pin or a start command to start a conversion.

    Best regards,

    Dale

  • 0 in reply to Dale Li
    Prodigy 20 points

    Goodmorning Dale, many thanks for your quick response.

    We only have 5 Vdc power supply so we think to use the first correct configuration, to be able to have 0-5 Vdc input range (only positive value):

    Is it correct?

    We do not understand clearly what are AINN and AINP.

    On the breakout board we only have AIN0-9 and AINCOM.

    Kind regards.

  • 0 in reply to Massimo Nannizzi
    TI__Mastermind 46235 points

    Hi Massimo,

    You can use either first configuration or second configuration with a 2.5V DC bias voltage. The ADC is measuring the voltage difference between the channels including AINx and AINCOM. The AINp is the signal you are going to measure and the AINn is reference input, for example, you can use AIN0 as input channel for your signal and the AINCOM as the reference to the ground.

    Best regards,

    Dale