monster33
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Hi everyone,
I want to purchase a new LNA but before ordering one, I want to compare its features with the old one.
Well the old one has a bandwidth of (0.1 MHz - 100 MHz), Gain = 30 dB and a NF = 4.5 dB. I used two amplifiers in cascade to get a gain of 60 dB.
Now I want to buy another one with bandwidth of (1 MHz - 10 MHz), Gain = 60 dB but in the datasheet there is no NF value only the noise input density is given = 0.9 nV / Hz
here the link of the datasheet : https://www.lasercomponents.com/de/...ets/femto/voltage/hva-10m-60-b.pdf&no_cache=1
There is also this additionnaly datasheet that gives the output noise (e_n) View attachment HVA-10M-60-B Output Noise.pdf where e_n = -109.38 dBm
I tried to calculate the NF using this equation :
NF = -174 dBm + Gain (dB) - 10log(Bandwidth) - e_n (dBm)
= -174 dBm + 60 dB - 6.95 dB - 109.38 dBm
= 2.33 dB :shock:
Am I right ?
Best regards,
Sana
I want to purchase a new LNA but before ordering one, I want to compare its features with the old one.
Well the old one has a bandwidth of (0.1 MHz - 100 MHz), Gain = 30 dB and a NF = 4.5 dB. I used two amplifiers in cascade to get a gain of 60 dB.
Now I want to buy another one with bandwidth of (1 MHz - 10 MHz), Gain = 60 dB but in the datasheet there is no NF value only the noise input density is given = 0.9 nV / Hz
here the link of the datasheet : https://www.lasercomponents.com/de/...ets/femto/voltage/hva-10m-60-b.pdf&no_cache=1
There is also this additionnaly datasheet that gives the output noise (e_n) View attachment HVA-10M-60-B Output Noise.pdf where e_n = -109.38 dBm
I tried to calculate the NF using this equation :
NF = -174 dBm + Gain (dB) - 10log(Bandwidth) - e_n (dBm)
= -174 dBm + 60 dB - 6.95 dB - 109.38 dBm
= 2.33 dB :shock:
Am I right ?
Best regards,
Sana