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ADA4522-1 biasing

Category: Hardware
Product Number: ADA4522

Hi Everyone,

I was trying to implement a TIA with ADA4522. I also wanted to bias the TIA from the noninverting terminal as shown in the figure below.

I was simulating it in LTspice and I saw that the voltage was getting clipped at the load.

 

Can anybody kindly suggest where I went wrong?

Thanking you in advance. 

Kind regards,

Dibyendu

Top Replies

    •  Analog Employees 
    •  Super User 
    Oct 3, 2023 +1 verified

    Hi  ,

    Good day. ADA4522-1 output is rail-to-tail which means that the output will be clamped when the input goes out of the input voltage range. In this example shown in the datasheet, the amplifier…

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  • Hi  ,

    Good day. ADA4522-1 output is rail-to-tail which means that the output will be clamped when the input goes out of the input voltage range. In this example shown in the datasheet, the amplifier was set as a unity buffer with a supply of +/- 15 V for an input voltage of +/- 15 V, the output was clamped since the IVR is from -15 V to +13.5 V.

    The same is true for your supply voltage. I would suggest if possible that you increase your supply voltage. These devices operate over the range of 4.5 V to 55 V and are excellent for applications using single-ended supplies of 5 V, 10 V, 12 V, and 30 V, or for applications using higher single supplies and dual supplies of ±2.5 V, ±5 V, and ±15 V. Hope this helps.


    Regards,
    Gilbeys

Reply
  • Hi  ,

    Good day. ADA4522-1 output is rail-to-tail which means that the output will be clamped when the input goes out of the input voltage range. In this example shown in the datasheet, the amplifier was set as a unity buffer with a supply of +/- 15 V for an input voltage of +/- 15 V, the output was clamped since the IVR is from -15 V to +13.5 V.

    The same is true for your supply voltage. I would suggest if possible that you increase your supply voltage. These devices operate over the range of 4.5 V to 55 V and are excellent for applications using single-ended supplies of 5 V, 10 V, 12 V, and 30 V, or for applications using higher single supplies and dual supplies of ±2.5 V, ±5 V, and ±15 V. Hope this helps.


    Regards,
    Gilbeys

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