This thread has been locked.
If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.
So I need to build a strain gauge simulator for 0v to 10mv, and I cant decide the best way to do it. I need to have at least 16 bit resolution on the voltage scale, so it is fairly high accuracy. Most of the DAC chips (DAC9881 for example) appear to be designed for higher voltage ranges, which obviously I could adapt to work for my application, but Im wondering if using a simple resistor network might be an easier option. Any thoughts on this would be appreciated.
You could just use a pair of precision, trimmed resistors to do this. For example, consider the DAC80501 with its 1.25V output range. If you could find a precision 100:1 resistor pair you could get the precision you need. You just need to make sure the resistor value is not too low. You may also need to buffer the output if the simulator must drive any current.
You could also consider an MDAC, which is a current output DAC. You could then implement a trans-impedance output stage that converts the current to the desired voltage output.
We are glad that we were able to resolve this issue, and will now proceed to close this thread.
If you have further questions related to this thread, you may click "Ask a related question" below. The newly created question will be automatically linked to this question.
In reply to Paul_Frost:
Thank you Paul! I think your right in that the DAC80501 in 1.25V output with resistor is probably the easiest option.
All content and materials on this site are provided "as is". TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with regard to these materials, including but not limited to all implied warranties and conditions of merchantability, fitness for a particular purpose, title and non-infringement of any third party intellectual property right. No license, either express or implied, by estoppel or otherwise, is granted by TI. Use of the information on this site may require a license from a third party, or a license from TI.
TI is a global semiconductor design and manufacturing company. Innovate with 100,000+ analog ICs andembedded processors, along with software, tools and the industry’s largest sales/support staff.