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ADL5330 NF and Output Noise Floor

Question asked by sin on Feb 4, 2016
Latest reply on Feb 4, 2016 by bkamak

Hi

 

I have some questions about ADL5330.
Datasheet says in Table.1,
at 100MHz
Maximum Gain       (VGAIN = 1.4V) :    23dB
Output Noise Floor (VGAIN = 1.4V) :  -140dBm/Hz
Noise Figure           (VGAIN = 1.4V) :   7.8dB

 

As kTB is -174dBm/Hz,
Output Noise Floor = kTB + Maximum Gain + NF
                   = -174 + 23 + 7.8
                   = -143.2 dBm/Hz

But Noise Floor is specified as -140dBm/Hz.

 

Please let me know the difference.

 

Best Regards.

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