Hi,
Please tell me how to use VREF of DAC7551.
Method of generating VREF voltage by voltage drop of external resistor
Specifications are VREFH = 3.017 V, VREFL = 0.197 V
best regards
This thread has been locked.
If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.
Hi,
Please tell me how to use VREF of DAC7551.
Method of generating VREF voltage by voltage drop of external resistor
Specifications are VREFH = 3.017 V, VREFL = 0.197 V
best regards
Hi Cafain-san,
The reference input impedance would vary by +/-20% causing a variation in the reference voltage due to the voltage divider network. This will result into gain error. Another point is that the power supply ripple and noise will directly reflect on the reference voltage and will appear at the output through the unity-gain output amplifier.
Regards,
Uttam
Please continue to ask me a question
Connect a resistor to the power supply and the VREFH terminal, and similarly connect a resistor to the GND and VREFL terminals,
Is there a possibility of damage to the device?
Even if both resistors are removed and VCC and VREFH terminals are connected directly,
and also the VREFL terminal is connected directly to GND,
code "0" will not output a voltage near GND,
Code "4095" will also output a voltage near VCC Will not be output.
Does it cause damage to the device or performance deterioration?
I think that it is not related to the absolute maximum rating in particular.
best regards