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Input / output voltage range for ADG409 & ADG5436F

Hello , 

I have two requirements for switches as follows: 

2 X 4:1 ADG409 and 2 X 2:1 ADG5436F

My analog signal range is +/-24V and supply voltage will be +/-30V. Are my selected parts suitable for this application ? 

Could you please suggest alternate parts if they are not ? 

Thanks.

  • Hi, Rkhedkar986.

    Unfortunately, the parts that you have selected will not work in your application as your specifications are even above the absolute maximum ratings of these parts.

    In normal conditions, the ADG409 and the ADG5436F have the dual supply requirement ranging from ±5V to ±22V and both parts’ input signals can be from rail to rail. Thus, the inputs can be from -22V to +22V if you are using a power supply of ±22V. However, your supply voltage and input signal exceed the ±22V supply voltage recommendation.

    As a side note, the ADG5436F has an overvoltage protection of -55V to +55V. However, this is not its normal operating condition and it is above the absolute maximum rating for the supply voltage span, 48V.

    Can you give more details about your application or even attach a block diagram/schematic file? This way I can review it better and possibly suggest you an alternative part.

    Yours sincerely,

    Igor.

  • Hello Igor, 

    Thanks for your reply. 

    Please see attached block diagram. I have bidirectional analog signals coming from either connectors J1 and J2. 

    So direction control of analog signals, was gonna be achieved by ADG5436F. 

    Now inside "Analog signal conditioning block", ADG409 will be used to feed to 4 different signal conditioning circuits from AIN_P and AIN_N pins and take outputs from those 4 different signal conditioning conditioning circuits to feed to Aout_P and Aout_N.  

    Analog signal is +/-24V (48Vpp). Could you please suggest alternate parts for this application ? 

  • Hi, Rkhedkar986.

    Our highest dual supply voltage switches are ±22V. You could use a single supply up to +32V, for the ADG409, and up to +44V, for the ADG5436F. But, this way you would only process the positive part of your signal.

    I assume you are measuring a differential signal, is this differential signal sitting up on the ±24 V? Can you clarify which application requires ±24V? Also, can you use a signal conditioning block before the switches’ inputs to lower the analog signal from ±24V to ±22V?

    Yours sincerely,

    Igor.