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Basic Electronics » Digital pots
January 27, 2010 by luisgarciaalanis |
Hello, I was looking for a 1MOhm Digital pot, but I don't seem to find any. Its for a proyect that uses a 1MOhm log pot. is thre such thing? Thanks Luis |
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January 27, 2010 by rajabalu21 |
Luis, Take a look at Maxim's site I am sure you can find what you are look for. -Raja |
January 27, 2010 by luisgarciaalanis |
not 1 Mega Ohm ones for some reason they tend to get up to 100KOhm |
January 27, 2010 by rajabalu21 |
Yes. You are right they max out at 100K. Other than connecting 10 of them in series, I am wondering whether is there a resistance multiplier circuit to make this possible. However, I found there is one from [Analog Devices] (http://www.analog.com/static/imported-files/data_sheets/AD5241_5242.pdf) with 1M option. Also take a look at this for all digital POTs. |
January 31, 2010 by sepeters |
hmmm, might be interesting to find a 10% 1MOhm resistor that was reading a bit low and then use a 10kOhm pot in series... just a thought. |
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