Hi Taroimo,
If the output current on the REF50 is going beyond datasheet maximum rating of 30mA or the temperature is exceeding 150°C then device damage and potential failure will occur. It is recommended to keep the output current at 10mA or below…
Hi Dogan
Thanks for confirmation . I looked in your circuit in more detail.
You are biaing the circuit with constant current source - I_IN = VEB/R11.
Let's say VEB = 0.6V , When R11 = 2K then I_In = 0.3mA which is < Ibias of the circuit and…
Hi Ross
There are multiple options for your problem -
You can use a SAR ADC with internal buffer and use one reference eg. ADS8900B + REF50 as mentioned in TIPD211
REF 60 can easily drive 2 of them as you are using it at low sampling frequency…
Hello Pratik,
Yes, you can use one REF5050 to drive 6 Vref and Vcm.
Please refer the design https://www.ti.com/tool/TIPD211 This uses 4 ADS8900B with one REF50 device. One Vref is driving 4 ADS8900B devices.
For Vcm, the REFOUT from each ADC is…
Part Number: REF6225 Hi,
We have been using the REF6225 in one of our boards and recently discovered that, due to a mistake, it has been powered with 10 V instead of 5 V. Interestingly, it has been operating normally with a buffered output and minimal…
Hi Hiro
Any noise on -4V (connected to the GND pin of REF50) will directly appear on the output, and it will not be a clean supply which is why this scheme is not preffered.
You will get stable output with respect to gnd in the app note method suggested…
If your REF33 and REF50 queries for the same purpose, may I suggest you close one and continue the other. My answers are similar on both of them. Similar to my answer on the REF33 thread, for the REF50 the equivalent link to the product reliability testing…
Hi Hattori-san,
At current higher than the rated current limit will cause the VOUT to drop until it hits 0V. When Vout = 0V we call this short circuit current. The device will continue to output current unless the situation is resolved. If the short…
Hi,
They are not needed. They are used to filter out high frequencies and frequencies of interest. They are probably used because the stage before the REF50 is a DC/DC switcher and its noise switching frequency is above the PSRR frequency of the REF50…
Hi Takumi San
It is only possible when there is 300uA current flowing into the REF50. You have to check carefully if there is any other path connected in your schematic.
Regards
Trailokya
