• RE: IF receiver

    thanks. i have some other question

    attached is my design circuit, can u give me some advice?

    1. for best performance, LO out of ADF4350 need more filter? how to design it?

    2. i don't know how to design the impedance match of ADL5801-> AD8375, AD8375…

  • AD 8375 Frequency range

    Can AD8375 work at 1.4 MHz with specified specs

  • Comment on Understanding How Amplifier Noise Contributes to Total Noise in ADC Signal Chains

    hi Umesh,

    The article is very informative.

    I have a doubt in the calculation of NSD for the VGA. You have taken the NSD as 20nV/sqrtHz (In AD8375 datasheet it is mentioned typically this value). Is there any equation to derive this value. In the…

  • how to design IF filter between ADL5801 and AD8375


    I want to design a IF receiver board, the RF input  from 400Mhz to 900Mhz, 40Mhz bandwidth,tuneable,   i want to get 144Mhz IF signal,

    I select following chips

    ADL5801         downconvertor mixter

    ADF4350         LO

    AD8375           IF amp

    who can tell me how to design…

  • RE: AD 8375 output impedance

    This is a structural issue with ADIsimRF.  Or to put it another way, the issue is how to fit the AD8375 into the ADIsimRF environment which expects each component to have real and relativelylow input and output impedances. The AD8375's output is a current…

  • RE: ADL5201 Output frequency

    How low in frequency do you wish to operate? The devices I suggest would be the AD8369, AD8370 and depending on how low in frequency, the AD8375.

  • Queries about AD8375 OIP3 Measurement

    Hi, there

    I am testing the OIP3 of AD8375 and found the results can't be get as specifications in the datasheet.

    When TC3-1 are applied at both input and output with the gain of 20dB, OIP3 is about 40dBm.

    When TC3-1 is placed at input, while ETC1…

  • Comment on Understanding How Amplifier Noise Contributes to Total Noise in ADC Signal Chains

    Hi Vishnu,

    I am sorry I didnt see this comment until now. The NSD for the amplifier is dependent on the design. The AD8375's architecture lends itself to a constant NSD of about 20nV/rtHz across frequencies. I am not sure that you can compare the NF…

  • RE: Differential IF amplifier for transmitter

    Thanks for the reply. It is not necessary to match to 50ohm throughout the circuit. AD8375 seems to be able to do the trick.

    On a separate question, I couldn't find a up-conversion mixer on the website. The requirement for the mixer will be IF 164MHz…

  • RE: Query about AD8375's Output Design

    Hello Wayne,

    At the input of the AD8375, there is a 3:1 impedance transformer and at the output there is a 1:1 transformer.  The transformer dictates whether a matching network is needed or not.  The 3:1 transformer takes care of the impedance matching…