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  1. speeder

    PCB layout DC-DC convertors

    DspDad, To answer your questions: 1) No, there is no facility on the convertors to do this 2) The board is split into two seperate sections The first section is made up of the first convertor, linear regulators and the analogue circuitry. The second section is made up of the other three...
  2. speeder

    PCB layout DC-DC convertors

    Thanks for all your suggestions!, The analogue signals in question are 1uS wide pulses with have a repetition rate of 300Hz, they can be as small as 10uV amplitude. The 4 DC-DC convertors run at 200KHz. The board must provide isolation from the incoming 24VDC supply therefore they are isolating...
  3. speeder

    PCB layout DC-DC convertors

    Hello, I am designing a board whose primary function is an amplifier for some very weak microvolt signals. Unfortunately due to space constraints I also have 4 5W DC-DC convertors on the same board which power external devices(not the amplifier circuit) I have placed the convertors as far away...
  4. speeder

    HART to microprocessor interfacing

    Hi, I need to interface an off the shelf HART output temperature transmitter directly into the serial port on a Hitachi H8S microprocessor. I see that HART modem Ics are readily available but other than that I'm not sure what hardware I need. I would assume I also need to obtain the Hart...
  5. speeder

    Accurate temp. measurement

    Hello, I need to measure 0-100C to an accuracy of 0.1C or better (4-20mA output) the electronics itself will be in 70C ambient. i want to use something like a PT100 and some sort of "hockey puck" style transmitter but I'm having trouble finding anything suitable. Anything that seems to...

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