Hi Arthur,
In internal reference, the gain error includes the inaccuracy of the on-chip bandgap voltage reference (over temperature, voltage, and process variation).
In external reference, the error in the voltage reference is not included (because it…
One thing needs to be added, the customer's ADC voltage reference uses REF3030 to directly connect to the 4 voltage reference pins, without RC filtering and buffer. However, there should not be such differences between different ADC groups
[Moderator Edit] See resolution in next reply down.
Hi Devin,
thanks for the feedback. I'm aware that tying VREFHI to VDDA to directly can introduce some noise into the ADC - but it's good to know that it's possible in general.
In the meantime…
Part Number: TMS320F280023 Other Parts Discussed in Thread: REF3030 Hi champs,
In internal reference 1.65V mode is functionally equivalent to force a 3.3V into VREFHI in external reference mode for the ADC, right?
My question is that can we say the capability…
Part Number: TMS320F28377S Other Parts Discussed in Thread: REF3030 , OPA320 Hi C2K champs!
Customer is developing PCB with F28377S and is looking for best fit for ref voltage (REF3030) buffer for 4 ADC modules.
They found OPA320 for REF3030 in User’s Guide…
Part Number: ADS131M08 Other Parts Discussed in Thread: REF3030 , Hi,
1. why it can accept AGND – 1.3(this value is in RECOMMENDED OPERATING CONDITIONS, not ABSOLUTELY MAXIMUM) at VAINxP and VAINxN? I mean, why it can accept negative voltage?
2. The…
Part Number: TMS320F28377S Other Parts Discussed in Thread: CONTROLSUITE , REF3030 Hi,
I have a piece of code that reads out the internal temperature sensor. It is largely based on the example provided in ControlSUITE. The main difference is that the sensor…
Hi Peter,
The F28377S Launch pad uses an buffered VREFHI IC (REF3030) and it is a fixed 3.0V voltage reference so the results you are seeing are correct for 3V.
Regards,
Joseph
Hello,
I found this topic while I was looking for additional information about using an INA333 in single-supply-operation. In the example in the datasheet the device is powered by a 3V power-supply and the REF-input should be supplied with 1.5V (= 3V…
Hi Joel,
I agree with you that the REF3030 is our most cost competitive solution under 55ppm/C between 0 to 70C.
It is also important to note that voltage references, unlike LDOs, have a small initial voltage tolerance. In the case of the REF3030, the…