Precision Data Converters

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Precision Data Converters

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REF5025
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  • Forum Post: Re: 2.5V REF can be optional for ADS79xx?

    Rick Downs - WEBENCH Design Center
    The "o/p" was meant to convey "output", not "optional". I have no idea why someone felt compelled to even put that there, but sorry for the confusion. The ADS7951 does not have an internal reference so the use of an external reference voltage is NOT optional - you have to...
    on Nov 19, 2009

  • Forum Post: Re: 2.5V REF can be optional for ADS79xx?

    Rick Downs - WEBENCH Design Center
    You're right, you probably don't need all that much current but the transient currents may be high - and they may be enough to cause the interference with the A/D. I'd agree that you could hook the REF5025 directly to the ADS7951, but use a buffer to create your virtual ground. The choice...
    on Nov 19, 2009

  • Forum Post: 2.5V REF can be optional for ADS79xx?

    Brian Willoughby
    I am in the midst of prototyping a couple of boards using the ADS7951. Starting on page 34 of the data sheet, the example circuits mark the REF5025 part as "o/p" which implies that it is an optional part. The text states that the chip "can operate with an external 2.5V ± 10mV...
    on Nov 19, 2009

  • Forum Post: Re: Bipolar analog supply design problem for ADS1258

    Xu Linfeng
    Bob B, Thanks very much for your reply. We can get -5V using MC79M05 from -15V which can operate in the temperature range. One question: In your EVM, why do you use LDO (TPS79225 and TPS72325) to generate reference voltage, instead of using precision voltage reference, such as REF5025? What...
    on Oct 14, 2010

  • Forum Post: Voltage References not working properly

    JACR
    Hi people Im in the final stage of product development and i have encountered problems with my voltage references (REF5050 and REF5025), because, for some reason, they just doesnt work! (or well... they do, but they output some weird voltage instead of the 5.0 and the 2.5V, for example, im getting...
    on Nov 22, 2011

  • Forum Post: RE: ADS1259 and oscillator CB3LV-3I-7M3728

    David V
    Hi Chris, About " However, it will not be exactly 5V because the OPA735's output will saturate around 20-50mV from the negative supply rail. " OPA735 is supplied with +5V and -5V and the output is -2.5V, I think it will not go into saturation, or I'm wrong? About "the resistance...
    on Apr 24, 2013

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