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
Sign up using Facebook. Also the pulldown resistor need not be that high. If I start reading random ports between 0 and 7it reads correctly for about 10 seconds, then suddenly starts cd051b zero. Is it possible that they are getting triggered?
At the very least, connect a pullup resistor of about 10K between IN and the 5V power source. Wouldn’t the digital pins be able to sink fast enough that the IC would mux correctly? Dahasheet breadboards cause loose connections within the board which you cannot see and hence lead to situations such as open connections etc.
You show that you’ve got your “Signal” leads connected to the select inputs.
I’m trying to multiplex an analog input port on an Arduino Uno. What is the signal source that you’re reading?
CDB from Texas Instruments
I did try to add a 10k resistor in series with the input, but it changed the output. So – tell more about what is connected on the analog mux pins? It still goes to zero. Sign up using Email and Password.
Home Questions Tags Users Unanswered. 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. 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 The is an analog multiplexer – it can switch analog signals between Vee Datasheet simulate this circuit — Schematic created using CircuitLab I’ve connected the input to 5V for testing stability of the reading.
Post as a guest Name. The CDB Output is grounded via a k resistor, so that unconnected ports read 0. Look at page 4 of this guide.
CDB Datasheet Harris Semiconductor pdf data sheet FREE from
Ideally something that would allow multiplexing without datazheet the signal. The value then starts reading randomly. Still, I was hoping for a method that wouldn’t tamper with the input signal in any way: Sign up or log in Sign up using Google.
LawrenceNK1G, I’m going to read a lot of things, like pots, voltage dividers etc. But perhaps I can calibrate it.
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I’ve programmed a small routine that checks for consistency of the signal reading. If I read only port 4 for 30 seconds, it starts to read correctly and stable.
I’ve also tried adding a 1uF capacitor.