SMN7103H
S
URFACE
M
OUNT
A
MPLIFIED
N
OISE
S
OURCE
H
OW
T
O
O
RDER
100 H
Z TO
500
K
H
Z
U
SEFUL
N
OISE
E
QUATIONS
Converting ENR to noise spectral
density (N
0
):
0 dB ENR = -174 dBm/Hz
Model #
Model #
S M N 7 1 0 3 H- D 1 C
Indicate Bulk or Tape and Reel when ordering in quantity
S M N 7 1 0 3 H- D 1 C - E V A L
For populated evaluation board
Calculating noise power in a
given bandwidth (BW) from noise
spectral density:
Power (dBm)=N
0
+10Log(BW)
Calculating V
RMS
from noise
power and impedance:
V
RMS
=10
[N + 10Log(R)-30dB]/20
P
ACKAGE
O
UTLINE
D
RAWING
Calculating noise power from
V
RMS
and impedance:
N=20Log (V
RMS
)-10Log(R)+30 dB
Where:
N=Power in dBm
R=Impedance in ohms
BW=Bandwidth in Hz
N
0
=Power Spectral Density in dBm/Hz
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