I have a 14-bit DAC. Ramping the data pins linearly from the minimum of 0x0
to the maximum of 0x3FFF
I see (using a scope) the analogue output voltage behaving as follows:
- In the first half (from
0x0
to0x2000
), the voltage ramps from1V
to1.8V
. - In the second half (from
0x2000
to0x3FFF
), the voltage ramps from0V
to1V
.
Is this the expected behaviour? What output voltage range should I be expecting for the analogue output? Why is there a "break" at 0x2000
?
Best Answer
I've figured out part of the answer. The break is due to the two's complement option being turned on (see page 14):