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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?
What is the output load on the individual channel outputs. That usually plays a role in the slew and settle time.
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In reply to Tony Calabria:
Thanks for replying. I guess I forgot to mention that the output load for each dac channel is an identically configured inverting opamp (OPA627).
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