HMC580ST89 not recommended for new designs

Hi Jim,

We don't have a particular part recommended as a direct replacement, but I can help you select another ADI part if you tell me more about the requirements of your application. For example, do you have any supply constraints? Do you need the same package type (SOT-89) or device type (HBT)? Any requirements for min/max gain, output power, linearity, etc?

Thanks,

SMcBride

Thanks, what I need is 1MHz to 1GHz bandwidth, total voltage gain of ~100 (so will need to cascade a couple of amps), and it needs to be 64 channels.

The input signals are  ~ 5mV random pulses that will be fed to data acquisition boards, I have no constraints on package, supply voltage etc

Hi Jim,

Your total voltage gain of ~100 corresponds to 40 dB so, each amp in your cascade must provide 20 dB gain.

For pulses of 5 mV (I'm assuming peak) the second amp in your cascade will need to capable of Pout~=+4 dBm. The only part under RF & Microwave recommended for new designs that I see coming close to meeting this requirement is the AD8353. It's a 1 MHz - 2.7 GHz gain block, internally matched, with typical gain=+20 dB and typical OP1dB=+9.1 dBm. Here is a link to the product page:

http://www.analog.com/en/products/rf-microwave/rf-amplifiers/gain-blocks/ad8353.html

Regards,

SMcBride

Great, thanks for your help, I will look at that part.