I am using both DACs in a TLC7528 and I am not seeing the same output characteristics on both DACs. I am updating DACA and DACB 250 nanoseconds apart at a 1Khz rate. My test case is setting both DACs from all 0's to full scale. VDD=+5V and both reference voltages are -6V.
DACA transitions to full scale in ~1usec but DACB takes much longer ~200usec to eventually transition to full scale.
I believe I am meeting all of the setup and hold time requirements of the device per the data sheet but I could not find any specification about time between DACA and DACB updates.
Has anyone used the TLC7528 or similar device that could help?
