I'm looking to control a lighting system that is 0-10v. The light needs to be dim so I thought I could get away with < 5V. The DAC works great but it turns out I need more than 5V. If I hooked it up to 12V, would it fry? The specs say no more than 5.5V but has anyone tried more? If I can't increase my input voltage, does anyone know of an easy way for me to double the signal's voltage?
Thanks
DAC with more than 5V
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- adafruit_support_mike
- Posts: 67454
- Joined: Thu Feb 11, 2010 2:51 pm
Re: DAC with more than 5V
Which DAC are you using?
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- Posts: 4
- Joined: Fri Jan 11, 2013 3:55 pm
Re: DAC with more than 5V
MCP4725 Breakout Board - 12-Bit DAC w/I2C Interface
http://www.adafruit.com/products/935
Data sheet: http://www.adafruit.com/datasheets/mcp4725.pdf
http://www.adafruit.com/products/935
Data sheet: http://www.adafruit.com/datasheets/mcp4725.pdf
- adafruit_support_mike
- Posts: 67454
- Joined: Thu Feb 11, 2010 2:51 pm
Re: DAC with more than 5V
Yeah, that chip will die at 12v.
According to the Absolute Maximum Ratings at the top of page 3, the highest you can go before you assume the chip has been damaged is 6.5v .
As far as doubling the voltage goes, there are ways to do it, but the exact solution that will be best for you depends on the details of your application. How much current do you need from the 0v-10v signal?
According to the Absolute Maximum Ratings at the top of page 3, the highest you can go before you assume the chip has been damaged is 6.5v .
As far as doubling the voltage goes, there are ways to do it, but the exact solution that will be best for you depends on the details of your application. How much current do you need from the 0v-10v signal?
-
- Posts: 4
- Joined: Fri Jan 11, 2013 3:55 pm
Re: DAC with more than 5V
Hey,
I was able to put something together. I wanted 0-10v, but actually for my application (dimming a light) I really just needed 5-10v. So, I put a 5v power supply in serial with the 0-5v DAC and could digitally control 5-10v. Nice and simple. Thanks for replying.
I was able to put something together. I wanted 0-10v, but actually for my application (dimming a light) I really just needed 5-10v. So, I put a 5v power supply in serial with the 0-5v DAC and could digitally control 5-10v. Nice and simple. Thanks for replying.
- adafruit_support_mike
- Posts: 67454
- Joined: Thu Feb 11, 2010 2:51 pm
Re: DAC with more than 5V
Glad you got it working.
Please be positive and constructive with your questions and comments.