CD4051B DATASHEET PDF
Data sheet acquired from Harris Semiconductor. SCHSD. CAUTION: The CDB, CDB, and CDB analog multiplexers are digitally-controlled . Product data sheet. Rev. 12 — 25 March 4 of Nexperia. HEFB. 8- channel analog multiplexer/demultiplexer. Fig 5. Logic diagram. An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in . Product Folder Links: CDB CDB CDB.
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(PDF) CD4051B Datasheet download
I’ve connected the input to 5V for testing stability of the reading. Still, I was hoping for a method that wouldn’t tamper with the input signal in any way: I’ve experimented with various delay times, and 30ms seemed to improve things a lot when reading sequantially 0, 1, 2, I’d try using a different board.
If I start reading random ports between 0 and 7it reads correctly for about 10 seconds, then suddenly starts reading zero. Is there a better alternative? From the Arduino wiki page, it reads “Futhermore, the is able to 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.
CDB Datasheet(PDF) – TI store
Look at page 4 of this guide.
But the documentation on their website is generally incredibly poor, so I wouldn’t be surprised. Problematic breadboards cause loose connections within the board which you cannot see and hence lead to situations such as open connections etc.
I’ve tried changing the pull-down resistor. But it changes nothing. This means that this chip will not work with 3. The IC has internal protection circuits. Email Required, but never shown.
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I did try to add a 10k resistor in series with the input, but it changed the output. Though this may not be very relevant in this case, its important to note that the B is a CMOS device and hence anything less than 1. Ideally something that would allow multiplexing without distorting the signal. At the very least, connect a pullup resistor of about 10K between IN and the 5V power source. I’m using a breadboard of questionable quality. I’m a bit lost to what the problem could be.
But perhaps I can calibrate it. Sign up or log in Sign up using Google. LawrenceNK1G, I’m going to read a lot of things, like pots, voltage dividers etc.
A 10K resistor works well in most cases. So – tell more about what is connected on the analog mux pins? I’m using digitalWrite on three pins to select the input port, and then waiting delay for 30ms before doing an analogRead on A0. I’ve also tried adding a 1uF capacitor. I imagine it could be something with capacitance on the ports, but I have the impression that the multiplexer is actually supposed to support very fast switching? If I read only port 4 for 30 seconds, it starts to datasheef correctly and stable.
I’m trying to multiplex an analog input port on an Arduino Uno. Is it possible that they are getting triggered? The Arduino has about 10Mohm resistance on the input side, so it shouldn’t make a difference, but the max reading was about instead of