I want to convert high speed (500 MHz) 5V clock to -5V. I wonder if ADG3248 is suitable in terms of voltage level. If not, which part is proper instead?
Unfortunately, the ADG3248 does not cover this wide range and negative level translation.
I would think the level translation you need can be catered by using operational amplifiers.
I'm moving this question to the amplifiers community to better support the application.
Hi,We are looking into this, we'll get back to you with the part you need.Regards,Goz
The combination of frequency and voltage requirement is relatively high for a single chip solution. I had explore the option to use comparator or an opamp to achieve this, however there are tradeoff seen on both product. Comparator is limited supply while opamp is limited by slew rate, which would require at least 10000V/uSec to toggle a -5v at 500MHz, for a +/-5v supply.
One option which I think worth looking uses a comparator, possibly AD8465 as a driver then the output of the comparator drives a switch that will connect and disconnect a -5v supply at the output. One side of the switch is connected to the -5v supply and the other side is where you can get your output from, this pin should also have a resistor connected to ground so once the switch turns off this will pull the line to ground. The main challenge with this design is the switch should be fast enough to toggle at 500Mhz.
Can you please share a target application of such requirement?
Actually I want to drive a high speed GaAs RF switch (HMC347ALP3E). The proposed driver in the datasheet is quite low speed, so I'm looking for another solution.
The AD8465 is quite fast. Is it possible to generate -5 and 0 levels from 0 and 3.3V clock?
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