Other Parts Discussed in Thread: INA141 Hi
If INA141 isn't being used, leaving the V+ and V- pins floating might be problematic and at the worst case it can oscillate.
Typically we've been grounding the pins through a 10K resistor when not used.…
Part Number: INA826 Other Parts Discussed in Thread: INA141 , INA818 , INA828 , INA823 Are there any tricks to compensate for the large gain drift in instrumentation amplifiers when the gain is not = 1?
Hi Thomas,
The dc characteristics of the INA141 are all specified in the datasheet. In a gain of 10 the maximum offset voltage of the part is +/-100uV. So with a 144.7uV input signal it is possible that yes, roughly half of what you measure is due to…
Hello Phillip,
There is a +/-25% variation in the absolute values of the internal resistors. Using an external resistor to set the gain can therefore yield significant gain error. There is a discussion of this on page 8 of the INA141 data sheet. …
Hello Paolo,
Our lowest offset instrumentation amplifier has an initial input offset voltage of 25uV+(75uV/G), which is greater than the offset you're trying to measure. So, no matter what, you will have to calibrate out the offset to use one of our…
Other Parts Discussed in Thread: INA333 , INA2141 , OPA333 , INA132 , OPA2188 , INA141 , OPA2180 , ADS1298 , TINA-TI Hello,
I am trying to develop a low power EEG measurement system based on the INA333 ECG example showed in its datasheet. As I am planning to realize…
Hello Emmett,
Thanks for the clarification.
In that case, you may be interested in the INA141. The gain can be fixed (10 or 100). The gain drift is 10ppm/C. You may have to adjust your shunt resistor accordingly.
Hello John Hardy,
a) The ISO124 can definitely provide you with isolation in the type of application you have described. The requirement of nano-amp input bias current is, however, outside of the capabilities of the part. You will need to include an instrumentation…
Other Parts Discussed in Thread: ISO124 , ADS8353 , ADS8556 , ADS8363 , ADS8354 , INA141 , LME49990 , TINA-TI Hi,
try to simulate an pickup amp for current sensing. I Need full differential Output and very low 1/f noise, so normal shunt sensors were not usable…
Kyle,
It's not clear from your description whether you need two instrumentation amplifiers or just one. The single version of the INA2321 gives you two input terminals and a single output. The gain is 5 without external resistors.
The INA141 (and…
