Thanks! I also got microchip 6002, 6004 recommended in another thread. Almost 1/10 the cost but I see features in the LM10.
https://www.mouser.com/ProductDetail/579-MCP6002-I-P I'm also looking at low cost, when possible, so building a toolbox of circuits, like Forrest Mims Engineers Notebook. Extending to 1.8v logic. Fred Kerr (mobile) On Sun, Sep 2, 2018, 7:03 AM Chris Green <[email protected]> wrote: > Fred Kerr <[email protected]> wrote: > > [-- multipart/alternative, encoding 7bit, 70 lines --] > > > > [-- text/plain, encoding 7bit, charset: UTF-8, 27 lines --] > > > > Hello all, > > > > How should the 1.8V ADC (and other) pins be protected? One method may be > > the attached, voltage divider of 1M/100K then limited by two diodes in > > series. (Not tested, just paper design currently.) > > > > I'd like to explore other methods or suggestions. I have some old or > > obsolete parts that I can use with info from data sheets. But it'd be > nice > > to go "modern". > > > > What about VCO to optoisolator? (Think of hostile / automotive > > applications.) > > > > Suggestions: Circuits, books, URLs? > > > I have used some very low power op-amps which I have actually powered > from the 1.8 volt ADC reference voltage. This means they *can't* > drive the ADC inputs to more than 1.8 volts. > > They are wired up as simple voltage followers so the output voltage > exactly follows the input voltage. The op-amps are TI LM10s. It's > been working for a year or more now and the BBB is all working still. > > The LM10 op-amps can handle quite large input voltages without damage. > > -- > Chris Green > ยท > > -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to a topic in the > Google Groups "BeagleBoard" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/beagleboard/fup1Qbz5__w/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/beagleboard/037t5f-mrl.ln1%40esprimo.zbmc.eu > . > For more options, visit https://groups.google.com/d/optout. > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/CA%2BaxsPawOuw8%3DbJjXeQrLeQaRf1uBcv8fA%3DRveR8V8E6Do%2BR2Q%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
