Hello,
I would like to make a ramping voltage from approximately 0.3VDC up to approximately 1.0VDC.
To accomplish this I decided to try out the TLC7226C from TI. I was able to get this chip to ramp from 0 volts to any voltage up to 10V max. But now, I don't want to start from 0 volts DC. I would like to start from 0.3VDC and ramp up to 1.0 VDC.
Please view attachment with circuit. Based on schematic, I have point "A" which when not connected to pin #5 of the TLC7226C part reads 0.294 VDC. But as soon
as I connect point "A" to pin #5 of the TLC7226C, I read a voltage at pin#5 of .54volts DC. ??? Why?
Isn't pin#5 an input for the analogue ground... so why doesn't it read 0.294 VDC as intended by point "A"???
confused
All help very appreciated!
r
I would like to make a ramping voltage from approximately 0.3VDC up to approximately 1.0VDC.
To accomplish this I decided to try out the TLC7226C from TI. I was able to get this chip to ramp from 0 volts to any voltage up to 10V max. But now, I don't want to start from 0 volts DC. I would like to start from 0.3VDC and ramp up to 1.0 VDC.
Please view attachment with circuit. Based on schematic, I have point "A" which when not connected to pin #5 of the TLC7226C part reads 0.294 VDC. But as soon
as I connect point "A" to pin #5 of the TLC7226C, I read a voltage at pin#5 of .54volts DC. ??? Why?
Isn't pin#5 an input for the analogue ground... so why doesn't it read 0.294 VDC as intended by point "A"???
confused
All help very appreciated!
r
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