What will be the potential reason for not getting enough Gain Flatness on my board. With TGA2524 i’m expecting 22 dB gain atleast come from the One IC but i’m using Amplifier, Filter, Amplifier,FIlter configuration. As per the Datasheet it sould give gain of 23.5 to 24dB. Next, I have a Doubt shall, we control the Suppy Sequence By using ACT41000.
If yes how may TGA2524 can connect with one ACT41000.
What gain and gain flatness are you getting over what frequency range?
Is the issue gain ripple, or gain roll off with frequency?
What drain voltage and quiescent bias current Idq are you using? The nominal 5V/320mA?
Poor gain flatness could be due to slight mismatches caused by the filters on the input and output. It could be due to the transitions from the TGA2524-SM RF input and output pins to the 50R line, which again could create mismatch. There may also be a grounding issue, creating high source inductance which could effect gain. It’s also worth checking the test set-up and cables are not effecting the measuement.
The ACT41000 could be used to supply the 5V drain voltage to the TGA2524-SM. You would still need extra circuitry to do the negative gate and drain bias sequencing, and to adjust gate voltage to give the correct Idq.
If you’d like a Qorvo FAE to help investigate your gain flatness issue then please e-mail appsupport@qorvo.com stating your company name and location.