current signal into voltage differential signal

Discussion in 'General Electronics Chat' started by frdlel49, Mar 2, 2011.

  1. frdlel49

    Thread Starter New Member

    Mar 2, 2011
    Hello all,

    I work on this subject for too many time, and I don't find the final solution.

    Here my subject:
    I've got a sensor (, AKL family) which deliver a logic current signal (4mA for low level, 8mA for high level). The goal is to transform this signal into a differential voltage signal, each output must be a (0-10V). So the differential signal will be (-10V/+10V) signal.

    I've searched a solution from "current sense amplifier", to a "full differential comparator with integrated reference", etc...

    Some solutions exist, but no-one with all my requirements.

    These are my requirements:
    Propagation delay: less than 1µs, and same delay between high-to-low and low-to-high
    Temperature range : -55°C up to +150°C (or -55°C up to +125°C: Military temperature range)(or worst : -40°C up to +125°C: Automotive)
    Package the smallest as possible (<SO8)(DFN6,etc...)
    V supply up to 10V minimum.
    If possible, integrated voltage reference (between 1V and 8V), or an external voltage reference.
    Ouput Push pull or open-drain, with a output current of 50mA minimum (or the nearest)

    MAX923 should be a solution, but I think that the SO8 package announced for the MIL temperature range should not be active.
    LM161 has a too big package
    LMP7300 is quite great, but it is a single comp in a SO8.... a double comp in a SO8 should be better...

    In fact, a lot of package are available in a CERDIP8 package, which is too big for my available space on PCB.

    If anyone had had the same problem, could you give me a way to find the right solution ?

    I'm opened to any suggestion.