Single to differential ended - circuit

Discussion in 'General Electronics Chat' started by Vindhyachal Takniki, Jan 22, 2015.

  1. Vindhyachal Takniki

    Thread Starter Member

    Nov 3, 2014
    349
    6
    I have attached a circuit. Since I have to measure the voltage using ADS1248.
    Now ADS1248 is connected to second board & it have single supply. (AVDD = DVDD = 3.3V)

    Output of INA121 in attached circuit is single ended. So I had used THS4521 to convert it to differential signal.
    1. I have selected gain = 1 for THS4521.
    2. Ground of both boards is common.
    3. I have left Vocm of THS4521 open . Will it put the signal to mid level of supply voltage to that its in Vocm range of ADS1248
    or I have to additionally connect 1.67V to THS4521.
     
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  2. Dodgydave

    Distinguished Member

    Jun 22, 2012
    4,986
    745
    So whats the problem then?
     
  3. MrChips

    Moderator

    Oct 2, 2009
    12,442
    3,361
    You have to connect Vocm to 1.67V.
     
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