XCVR2450 Gain Calculations: AD8132 Low Cost High Speed Differential Amplifier

Hi All,

I’m looking at the parts of the XCVR2450 trying to do theoretical gain /
noise calcs.
My first question is… has anyone else done these? Do my numbers seem
reasonable?

Secondly… I don’t know what gain the AD8132 has… it seems to offer G
=1,2,5,10 according to page 15…
Should I be assuming the Gain is maxed out to 10?

http://www.analog.com/en/specialty-amplifiers/differential-amplifiers/ad8132/products/product.html

Thanks,

-Michael

2.45 GHz Gain (dB) Gain Noise Figure (dB) Noise Factor
Wire -1 0.794328235 1 1.258925412 F1
1.258925412 c Switch -0.75 0.841395142 0.75 1.188502227 (F2-1)/G1
0.237310244 b Diplexer -0.7 0.851138038 0.7 1.174897555
(F3-1)/(G1G2) 0.261687958 a Band Pass Filter -2.2 0.602559586
2.2
1.659586907 (F4-1)/(G1
G2G3) 1.1595034 i Maxim2829 30 1000 0 1
(F5-1)/(G1
G2G3G4) 0 j AD8132 10 1001
(F5-1)/(G1G2G3*G4)
2.917427014 Total F
5.834854028 7.660299957 dB

5.4 GHz Gain (dB) Gain Noise Figure (dB) Noise Factor
Wire -1 0.794328235 1 1.258925412 F1
1.258925412 c Switch -0.9 0.812830516 0.9 1.230268771 (F2-1)/G1
0.289891207 b Diplexer -1.6 0.691830971 1.6 1.445439771
(F3-1)/(G1G2) 0.68990452 i Maxim2829 30 1000 0 1
(F4-1)/(G1
G2G3)
0 j AD8132 10 1001 (F5-1)/(G1
G2G3G4) 2.238721139
Total F
4.477442277 6.510299957 dB

The AD8132 is configured for G=1

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