The ADG711, ADG708 and the ADG736 are all qualified for Automotive, and are operational at 1.8 V.
You could check if any of these configurations will suit your application.
Is your supply also 1.8 V?
Can you share a screen capture of one SPI frame for 1) DAC with CS pin as SYNC, 2) DAC with GPIO as CS pin? There might be some differences between the CS and GPIO pins functionality, so let's check this first.
A band-aid solution would be to…
The ADG701 was first released way back 1998 and the min and max specs were not characterized before. So unfortunately, the data you are asking for is not available.
The ADG711 on the other hand, has leakage current min and max specs as low as…
Unfortunately we do not have a spice model available for the ADG1611 at this time.
What supplies are you using for the ADG1611 model?If the ADG1211 model is simulated with a dual 5V supply the model will not function properly. The ADG1211 is optimized…