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CD4067

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Technical/Catalog InformationCD4067BE
VendorTexas Instruments
CategoryIntegrated Circuits (ICs)
TypeMultiplexer/Demultiplexer
Voltage Supply SourceDual Supply
Voltage - Supply, Single/Dual (±)±3 V ~ 18 V
Circuit1 x 1:16
On-State Resistance240 Ohm
Mounting TypeThrough Hole
Package / Case24-DIP (600 mil)
PackagingTube
Current - Supply.08A
Operating Temperature-55°C ~ 125°C
FunctionMultiplexer/Demultiplexer
Drawing Number296; 4040053; N; 24, 28, 40
Lead Free StatusLead Free
RoHS StatusRoHS Compliant
Other Names CD4067BE
CD4067BE
296 3517 5 ND
29635175ND
296-3517-5

Product Manufacturers Pack D/C
CD4067 - - -

Pinout/Connection Diagram

cd4067 Circuit

A 16-step programmable current generator can be modified so that it's controllable by a printer port. This is done by switching the resistor connected between the output of the generator's OA1 op amp and the input of OA2. The CMOS single 16-channel analog multiplexer (ICl) chooses one resis-tor at a time, in accordance with the code sent by the printer port through four of its eight data-out-put lines (pins 2 to 9). In addition, one control line (pin 1) is used to enable the operation. As a result, 16 outputs can be selected by a 4-bit word (the table shows the relationship between data word and selected resistor).

 The following must be fulfilled in order for the circuit to work as a true current generator:

                                                              R×Rd-Rb×Rc =0

The smaller the resistors' tolerance (especially RI through R16), the greater the output resis-tance of the generator.

Because the OA2 is connected as a repeater, the current I2 = O, and only the load current flows through one of the RI through R16 resistors. Therefore:

                                                              cd4067 Circuit

where Vout=Vin;X=1…16;and Ron≤150Ω(for VDD=10 V) is the resistance of one analog switch(CD4067)in conduction
  Therefore,the values of resistors R1 through R16 can be inferred from the needed currents∶
                                                              cd4067 Circuit
     

  The Turbo c++ program also controls the current through the load

                                                             cd4067 Circuit

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PDF / Datasheet

CD4067B  PDF Download

CD4067B

File Size: 275767 KB
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