Part Number: TIPD170 Other Parts Discussed in Thread: INA826EVM I will be using this strain gauge design in a car (tetsing rods). Their will be a lot of EMI and I would like to add a 200-Ohm Low Pass Filter. Where would you suggest adding this to the cricuit…
Part Number: TIPD170 We are using TIPD170: Single-Supply Strain Gauge in a Bridge Configuration Reference Design .
We started testing our strain gauge with this board but we could not get the desired results.
The output of the Amplifier swings (1V pk…
Hi Robbie,
Yes you may use one of our instrumentation amplifiers like the INA333: http://www.ti.com/tool/TIPD170
Or you can create your own with 2 amps as shown in this circuit: http://www.ti.com/lit/an/sboa247/sboa247.pdf
-Tamara Alani
Hi Andy,
I still think that the drift comes from the heat dissipation within the bridge resistors. The current of a usual 350R strain gauge bridge should only be about 1mA. But in your circuit a current of 3.6mA is flowing. So, the heat dissipation is…
Hello Murugavel,
Please take a look at TIPD170 . TIPD170 is for a strain gauge application but it can be redesigned for a load cell application and the INA333 used in the design can be replace with another instrumentation amplifier that may better fit…
Hi Vishal,
Here is a TI Precision Design that walks through the design of a bridge amplifier: http://www.ti.com/tool/tipd170
You will want to use a well regulated supply for your excitation voltage to reduce measurement errors.
Regards,
Zak Kaye
Precision…
Hello Zahra,
There are multiple factors to take into consideration when selecting an op amp (or more likely an instrumentation amplifier) for this application. Therefore I suggest reading TIPD170, which is a strain gauge reference design that utilizes…
Other Parts Discussed in Thread: INA333 , TIPD170 i have a circuit with INA333 to measure temperature using RTD. i am using 3.3V single ended supply and i fixed my gain 11.
The problem is my gain is varying when i change the resistance(RTD) from 820 to…
Other Parts Discussed in Thread: INA333 , LM7705 , INA326 , OPA314 , ADS1013 , ADS1014 , TIPD170 I am looking at using the INA333 instrumentation amplifier to condition a pressure sensor. The sensor has an input voltage of 10V nominal with supply current of…
Hello Bob,
Thanks for the compliment!
You could reduce R2 as low as 100kohms. If that is not acceptable, perhaps you'd be interested in a different approach using a 2 or 3 op amp IA. The issue there is that you may have an output swing limitation…
