• ADM2491E MAX Output Current

    In the maximum absolute rating column of data sheet P6
    Average Output Current, per Pin = ± 35mA.

    From this specification, I understand that the maximum number of bus connections is up to 7 units when using two 120Ω terminations.
    Is it correct…

  • ADM2491 NC pin treatment

    Dear Sir,

    I'm asking about ADM2491E NC pins (#7, #10) treatment.

    We plan to connect  the NC pins to GND because of replacement for TI ISO3086.

    But according to ADM2491E datasheet, it says "No Connect. This pin must be left floating.".

    Are there…

  • ADM2484E voltage specification

    the data sheet for the ADM2484E device lists the voltage supply range for VDD1
    from 3.3V to 5V. The VDD2 supply is rated 3.3V. On page 16, observing Table 7
    we can see VDD1 is rated to 7V max, however VDD2 is rated up to 6V.

    We were lucky enough…

  • ADM2484 revA board

    I have sent to my customer the new ADM2484E evaluation board revA. On ADI
    website we found only information about Rev 0. Could you send me the new
    schematic for Rev A board ?

     

    The ADM2484E Rev.A evaluation board schematics and BOM are attached…

  • Can the ADuM1250 drive a 25 metre line?

    Can the ADuM1250 drive a 25 metre line?

     

    The ADuM1250 is specified to drive 400pF. A 25m line is likely to have much
    more than 400pF of capacitance (very roughly 2pF /cm so 2500*2 = 5000pF)
    A 25m line will also couple large amounts of noise, e…

  • RE: ADM2484E Replace TI ISO3080

    Hi Jack,

    I can confirm that pin 7 and pin 10 are more specifically than NC, actually NIC ("Not internally connected") so while not a footprint match they are compatible footprints.

    One significant point though is that ADM2484E requires 3.3V…

  • RE: ADM2484E Vdd2

    5V operation on Vdd2 is not possible for ADM2484E, the integrated RS-485 transceiver is a 3.3V supply transceiver.

     

    An alternative is the ADM2491E, a similar configuration to ADM2484E (full duplex pin-out) but designed for 5V operation on Vdd2. The ADM2491E…

  • RE: ADM2490E Problem with One Master, Multiple Slaves Full Duplex RS-485 Communications

    Hi Jayant,

    ADM2490E is intended for point-to-point or multi-drop applications, including RS-422. It has no driver or receiver enable pins.

    ADM2491E would suit better for your application (per your diagram), as you can use processor GPIO (or flow-control…

  • RE: ADM2486 Ground connection

    Hi Gabe,

    Thank you for your query.

    The ADM2486 will not operate reliably with a 3.3V VDD2 supply, the device accepts a supply voltage between 4.75V and 5.25V.

    If the customer requires an isolated transceiver RS485 transceiver with a 3.3V supply on VDD2…

  • TAGS LIST: Interface and Isolation

    LTM2894
    LTM2895
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    LTM2885
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    LTM2884
    LTM2893
    LTM2886
    LTM2887
    LTM2889
    LTM2892
    LTC1694-1
    LTC4300
    LTC4310
    LTC4302
    LTC4305
    LTC4304
    LTC4303
    LTC4306
    LTC4307
    LTC4307-1
    LTC430…