Tagged Questions
Anything related to the design and implementation of voltage references, i.e. circuits behaving like fixed (constant-value) voltage sources whose output voltage can be deemed very precise, accurate and stable. Voltage references are not meant to provide significant current to external circuits.
10
votes
1answer
405 views
Can I use differential I/O pins of FPGA as high speed comparator?
High speed comparators are rather expensive and speed is what FPGAs are very good at. On the other hand, FPGAs (in my case: XC3S400) have paired differential pins in each bank that their voltages are ...
2
votes
2answers
286 views
ratiometric ADC, is it feasible to separate reference voltage and excitation voltage by an amplifier
I have a variety of bridge transducers (pressure, strain gage) with sensitivity of 1mV/V. Also, most 24-bit ADCs and analog frontend chips have a PGA with programmable gain between 1-128. This means ...
7
votes
1answer
727 views
Using a Zener diode as voltage reference
I want to use a zener diode as a voltage reference to the the PIC18F2550, as the analog V+ reference. I am planning to use this zener diode, but I am not sure how to calculate its values. I am ...
2
votes
2answers
162 views
Which is the correct voltage reference for a single supply instrumentation amplifier?
I'm working on using the TI INA333 in a single 3v supply configuration. I need to create a "mid supply" (half V+) for the REF pin.
I have thought of 3 ways to do this:
Voltage divider with ...
