Hi,
I want to understand the behavior of DAC8811 if there is not SPI interface connected to IC.
I have used 5Vref so it will provide 0mA or 1mA at I out pin without any code?
Regards,
Rohit
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Hi,
I want to understand the behavior of DAC8811 if there is not SPI interface connected to IC.
I have used 5Vref so it will provide 0mA or 1mA at I out pin without any code?
Regards,
Rohit
Hi Rohit,
The initial shift registers are filled with zeros. However both the shift and DAC registers are filled with zeros during the power-on, on most of our devices usually they are set by the time the supply reaches ~2 V. This is because the chip has an OTP (one-time programmable) register that is responsible for setting the DAC to its default state during power-on.
At power up we recommend that all digital inputs should be at a valid state. Do not float these pins
When all the codes are at zero, device output should be 0V as per the transfer function. for Full code, Vout = -Vref
Vout = -Vref * (CODE/65536)
Regards,
AK
Hi Akhilesh,
SPI interface is connected to controller but there is not code in the controller.
In that case I will see 0mA at Iout pin of DAC8811?
Regards,
Rohit Arora
Hi Rohit,
Yes, the expectation is that you will have 0mA on the output.
Thanks,
Paul