• LTC1966 Malfunctioning

    I have simulated using LTspiceXVII the LTC1966 RMS to DC converter for my application. But when tried to implement in reality it won't work in Lab.  Below is the screen capture of how i tried to implement.

    In reality when as soon as i power the IC…

  • LTC1966 won't work

    Hi Everybody , 

    I soldered my LTC1966 on an MSOP to DIP adaptater to test it and see how it works .

    So once i had it done i made the following connection, you can see the schematics in the image joint (all the grounds are connected) , my LTC1966 outputs…

  • ISSUE WITH LTC1966 RMS TO DC CONVERTER

    I have simulated using LTspiceXVII the LTC1966 RMS to DC converter for my application. But when tried to implement in reality it won't work in Lab.  Below is the screen capture of how i tried to implement.

    In reality when as soon as i power the IC…

  • LTC1966 Single Supply RMS Current Measurement

    Hi,

    On page 38 of the datasheet (https://www.analog.com/media/en/technical-documentation/data-sheets/1966fb.pdf), should the ground be tied to AC ground?

    I have a SSR on a PCB that switches on/off the line voltage going to an AC motor. Neutral and ground…

  • RE: LT1966 LT SPICE SIMULATION

    Hi aiedb:

    In your circuit, IN1 is being driven negative while the LTC1966 does not have a negative supply.  In order to use LTC1966 on a single supply, use the circuit shown in the datasheet, Figure 9b.

    Also, with a 250mVpk (500mVpp) sinusoid, the correct…

  • RE: Using differential Amplifier on LTC1968, and the input voltage changes; please help

    Hi Shurp:  Yes, this happens simply because the LTC1966/7/8 output is not buffered.  The data sheet spec for output impedance of LTC1968 is 12.5k Ohms typically.   So you need to buffer the outputs before doing the difference amplifier.  Or, you could use…

  • RE: LTC1967 / LTC1968 input common mode voltage setting

    Hi SteveOne:  the data sheets show the effective input impedances of the LTC1966/7/8.  For the LTC1968, it is spec'd as 1.2M Ohm differential.  So that will be the R working into Cc that you can use to calculate the tau.

  • RE: RMS Current Control Based on LTC1968

    Hi aliaykan:  The LTC6226 seems like overkill on the bandwidth compared to the LTC1968 and LT1782.  Also, it has high bias current which will compromise the accuracy of the LTC1968.  For a gain of 2, I would recommend another LT1782.

    Regarding the speed…

  • LTC 1966 LT_SPICE SIMULATION

    Dear Team,

    I need to use LTC1966 for one of my application.

    My input has a DC value of 1.1V and has an ac of 0.355mv.(This is coming from a MEMS Microphone SPV1840LR5H-B  from Knowles).

    May I know how I simulate this circuit in LTSPICE. I don't know for…

  • RE: LTSpice simulation not matching Reference Design

    Hi Hbert, I don't support the LT1966 but have used it in the past. First problem is your VOUT and OUTRTN are swapped. But even after swapping... it still didn't work. 

    This family of parts can be a bit tricky, and LTspice may not accurately all…