Hi Helge,
Can you verify the output of both on-board references, the REF5050 and REF5025. You can accomplish these measurements by probing the voltage across R14 and R15. From your post above, I'm more concerned about the output of the REF5050, since…
Yes, I agree. The design uses a REF5050 for ADREFHI so there is a very accurate and stable reference, and a different regulator to supply 5.1V to VCCAD and another circuit. The REF5050 can only source 10mA, but both ADC modules and references in the TMS570…
Hi VIBIN,
Welcome to the TI E2E Forums!
The ADS1282 does not communicate with one a single supply connected. Internally, the device is held in a reset state until both power supplies have crossed a minimum threshold voltage. Some additional details…
Hi Venkatavel,
Thanks for sending these files, I summarized the data in the table below. Looks like the noise values are not exactly the datasheet values, but they are usually within 10-15nV. Quite honestly, vibrations in the room in which you are testing…
Hi,
If you are going to use only internal reference, please delete REF5050. You can use single ground with 3 horizontal lines, no issue. But I can see some of the three horizontal line grounds are named as GND and others are not. Please follow one ground…
Hi Sandeep,
Sorry for the delayed response. There will be some gain and offset drift associated with any temperatures changes. This will include references, supplies, ADCs, resistors, capacitors, PCB layout, etc.. With many of our ADCs you can issue…
Hi Tokumoto-san,
Overall, great job, the schematic looks good, however there is one important finding that I wanted to verify, and that is the connection scheme of REFOUT to REFIN.
I've noticed that you are using REF5050 for the external reference…
Hi Cynthia, hi Bob:
First, thanks for the link of books. I found there some good books.
I took a look at those ADCs before, but the 10V for the load cell is a requirement.
Then, I guess the best option is to use a precise voltage reference of…
Hi Devin,
The Reference IC used is REF5050, and the OP-amp is LM6482.I still have the RC networks connected in parallel after OP-amp. Actually I've increased the S+H duration to 1.13 Usec. However,still the problem persists when all the ADCs are not…
Hello Dejana,
The ADS8920BEVM generates the necessary voltages for the input amplifiers, ADC, and reference. RVDD is the analog supply voltage, and is a separate voltage from DVDD, which sets the IO voltage levels on the digital pins.
The evaluation…
