CD Datasheet, CD Single 8-channel Multiplexer/Demultiplexer Datasheet, buy CD Data sheet acquired from Harris Semiconductor .. CD MHz. VOS at Any Channel. MHz. Electrical Specifications Common Conditions Here: If. CDBMS, CDBMS and CDBMS analog multi- plexers/ demultiplexers are digitally controlled analog switches having low ON impedance and very.

Author: Gobar Bralmaran
Country: Sri Lanka
Language: English (Spanish)
Genre: Marketing
Published (Last): 11 October 2013
Pages: 276
PDF File Size: 15.97 Mb
ePub File Size: 18.90 Mb
ISBN: 198-1-39446-461-2
Downloads: 15346
Price: Free* [*Free Regsitration Required]
Uploader: Faem

Post Your Answer Discard By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand datassheet your continued use of the website is subject to these policies. What is possible is to use a current source for each sensor and then only multiplexing the resulting voltage to the ADC input. But they are now activated through a HC IC as below.

Using mux on middle wire of PT and differential measurement of A0 and A1 catasheet lead wire resistance. So the problem is clearer now: I have also included a resistance 2. Additionally i need lead wire compensation. A multiplexer or demultiplexer enables you to expand the in-and outputs on your Arduino board. Of course, there is no way to measure the resistance of dqtasheet other two leads because no significant current passes through them.

You can choose between 8 different inputs and select just one you want to read at the time. Here is the plan: I am interested in developing a generic 8-channel 4-wire PT interface for RaspberryPi.

In this figure, the first wire of pt is supplied by 1mA current through a HC see footnote. There is no delay needed between selecting and read or writing the pin. By using our datasheeet, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. I am only now interested in 3-wire PT sensors as these are what available locally at affordable prices.


Datasheets search archive of electronic components datasheets

Am i wrong or OK in this regard? Kindly let me know if there are any mistakes or improvements in the above scheme. Each of these pins have to be connected to one digital out pin on the Arduino. All the rest of the requirements remain the same.

Each of these pins have to be connected to one digital out pin on the Arduino. The playground is a publicly-editable wiki about Arduino. Cd401 on other Chips. If i simplify the requirement to 3-wire PT, will it help? The diode prevents the datasheer of other PT channels not activated by HC Finally i didnt go c4d051 the above but a modification using Bimpelrekkie ‘s suggesstions. If you use the as a Demultiplexer you can dstasheet between 8 different outputs and select just one you want to write at the time.

If some other idea could be evolved, it would be great! But this increases components and board size. Email Required, but never shown. This i presume will help make a better differential measurement at the ADC A2 and A3 while avoiding any current passage through HC Arduino on other Chips.

I am a novice dayasheet eng. Thanks a lot for responding so far. Is leakage current going to be a problem? Realistic problems are going to crop up when you attempt to protect the inputs against the things that can happen off board.

Please correct me if i’m wrong in this. I guess i will have to go with the better versions of for now. Futhermore, the is able dafasheet work with analog values; in the case of the Arduino, you are able to use the analog inputs with a voltage between V and route them to an Analog-In Pin on your Arduino. Spehro Pefhany k 4 Then B measure voltage drop across PT Can i use transistors as switchs to route the 1ma instead of CD?


The last HC has no use because all the inputs are shorted common to the exit resistor! If you use the as a Demultiplexer you can choose between 8 different outputs and select just one you want to write at the time. Sign up or log in Sign up using Google. Since it expands i cant post it as a comment. The tolerance of the resistors won’t affect the stability of the current from your current source. Board Setup and Configuration.

You mean once the resistor if soldered fixed, the current from a particular circuit will be stable over time and temperatures?

It may affect the actual current.

raspberry pi – Multiplexing PT with CD – Electrical Engineering Stack Exchange

Neither can i post as an edit, i guess because it is an answer of sort, a comprehensive one. I checked with local supplier and they dont have this available.

I will hand pick the resistors but what about temperature compensation? No, that is not a problem as long as the current source is working properly.

It is not possible to read or write more than one pin on the at the same time, because you can only select one pin at a time.

As long as there is enough voltage headroom across the current source circuit so that it is able to actually make that current flow then any extra series resistance doesn’t daatasheet. An HC would be better at 5V.