| ??? 06/29/03 21:13 Read: times |
#49664 - RE: Analogue Multiplexer for 0-10V Signa Responding to: ???'s previous message |
Sajid Hussain Ansari wrote:
------------------------------- I want to use a multiplexer for 0-10V input Signals. For which I have Selected 4051 IC. For 0-10V input range I kept VDD=+12V,VSS=0V,VEE=0V. But as I switched on the supply voltage with input Signal(0-10V)Present, the IC becomes hot. What control voltage did you use? Will this IC not work for 0-10V input signal, the Data Sheet of this IC shows that it will work upto 20V. If I read the datasheet correctly, the chip will work fine with a 12V supply. But the control voltage should also be 12V. If you are trying to control the chip with a 5V control signal you may get into trouble. That voltage is in the "undetermined" zone between Vdd and Vss, and could cause the chip to get hot. Try controlling the switch with 12V also (perhaps try a 7407), and see if that helps. I have only used these chips in circuits where everything ran on the same supply voltage, so the above is just from reading the datasheet. Best regards, Mikkel C. Simonsen |



