FAQ: What are the input driving and output load requirements of the ADG3300/01/04?
To ensure the correct operation of the ADG3300, ADG3301, and ADG3304, the circuit that drives their input channels should have an output impedance of less than or equal to 150 Ω and a minimum current driving capability of 36 mA as stated in the input driving and output load requirements section of the ADG330x datasheet.
The 36 mA drive current is needed to drive the input/output pin (Ax/Yx) during fast 0 V to 5.5 V transition. It can be lower due to the presence of the one-shot generators and if the switching speed requirements are low. Once the threshold value is achieved, the one-shot generator will kick in and help pull the voltage up or down as required, reducing the required current driving capability.
The ADG3300/01/04 level translators are designed to drive CMOS-compatible loads. If a high current driving capability is needed, it is recommended to use external buffers such as ADA4891, AD8061, and AD8063 between the ADG3300/01/04 outputs and loads.