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THS4521 with Negative Swing Input in single Supply Operation

Bijeta chakraborty9485
Prodigy 500 points
Other Parts Discussed in Thread: THS4521, ADS1278

Hello Team,

My customer is using THS4521 as a driver for the ADS1278 part.Is it ok to configure the part as mentioned below ?

VS += 5V

VS-=GND

VIN+ = Sine Wave with +/- 2.5V .

VIN- = Connected to GND

Attached is the document with the schematic proposed. Please get back to me with your confirmation.

Thank you,

Regards

Bijeta Chakraborty

 

THS4521-ADS1278 Driver.doc
  • 0
    Prodigy 120 points

    Excuse me, why did you configure Vcom as 2.5V ?

    Does it mean that the average voltage value of  Vout- and Vout+ is always 2.5V?

     

    Thank you!!

  • 0
    Prodigy 155 points

    I tried the 4521 in a low gain bandpass configuration to act as a balanced mixer driver.

    Ac works fine and tran as well, but overloading the input turns the device into oscillation, despite the overload transient recovery spec in the data sheet.

    i suspect the model and will try the circuit on a real bench.

    any suggestion from the team ?  (rf = 150k, all c's are 10p, rseries in = 10k rpar2gnd = 1.1k