Driver circuit HMC547ALP3E GaAs MMIC SPDT NON-REFLECTIVE SWITCH, DC - 20 GHz

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asimov_18

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Hi,
I am designing an instrument using HMC547ALP3E GaAs MMIC SPDT NON-REFLECTIVE SWITCH, DC - 20 GHz.
This switch requires a 0 to -5V differential signal for operation. The datasheet for these devices provides a sample
circuit that converts 0to +5V signal to negative range to drive these circuits.



However I am concerned if this driver circuit is capable of working at frequency of 100 MHz. Hence I was trying to build
a driver circuit using ECL gates and a -ive supply rail. However I was concerned about the ECL circuit not working due to small
voltage swing associated with ECL circuits. Any work around solutions one can think off and suggest?


Regards
Asimov
 

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"Working at 100 MHz" is a bit vague kind of specification. You want to differentiate between propagation delay, propagation delay skew, rise/fall time and maximum switching frequency. I would expect that fast 5V logic series like AHC or single/dual gate LVC can work for your application. The input level shift circuit may need a speed-up capacitor.

I also guess that driving "100 MHz" logic won't use 5V IO standard, we don't see yet the full picture.
 
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