Jul 01, 2020
01:52 PM
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Jul 01, 2020
01:52 PM
I have a 7-bit IDAC configured as a source and driving a 10k resistor. The full-scale value should be 127*2.4uA*10k=3.047V. However, it barely generates more than 2V when its value is set to 127. What is the reason for this?
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PSoC 4 Architecture
1 Solution
Jul 01, 2020
04:07 PM
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Jul 01, 2020
04:07 PM
The IDAC architecture is a current mirror. It needs a headspace approx 0.6-0.7V from top rail to operate.
/odissey1
2 Replies
Jul 01, 2020
04:07 PM
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Jul 01, 2020
04:07 PM
The IDAC architecture is a current mirror. It needs a headspace approx 0.6-0.7V from top rail to operate.
/odissey1
Jul 02, 2020
11:16 AM
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Jul 02, 2020
11:16 AM
Great. I found that there is a quantity called compliance voltage in the datasheet, which is basically the headroom required for the idac to operate