Shop OBEX P1 Docs P2 Docs Learn Events
what is the DC input resistance of an LT1298? — Parallax Forums

what is the DC input resistance of an LT1298?

Adrian SchneiderAdrian Schneider Posts: 92
edited 2010-08-02 10:51 in General Discussion
Hi
I am wondering about the size of the DC input resistance of a LT1298 ADC. I could not find the answer in the datasheet.
Maybe I missed something. From measurements I think it is about in the 100k to 1M range.

Thanks & Regards
Adrian

Comments

  • LeonLeon Posts: 7,620
    edited 2010-08-02 10:51
    It's the LTC1298. See page 6 - there are graphs showing max. clock freq. and sample and hold acquisition time vs source resistance. It'll be around 1k to 10k. Also see page 16, the input looks like 20pF in series with 500R.

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    Leon Heller
    Amateur radio callsign: G1HSM

    Post Edited (Leon) : 8/2/2010 10:58:09 AM GMT
Sign In or Register to comment.