SMN7103H
1/2 I
NCH
S
URFACE
M
OUNT
A
MPLIFIED
N
OISE
S
OURCE
D
ESCRIPTION
The SMN7103H noise module is designed for a wide range of applications. It features high noise
output amplitude for uses ranging from encryption to baseband signal simulation. All biasing and
amplification circuitry is built-in making it easy to design into your system. It features a built-in
voltage regulator for highly stable output even if your DC supply lines are not.
100 H
Z TO
500
K
H
Z
S
UITABLE
7103H
FOR
H
IGH
V
OLUME
P
RODUCTS
:
The SMN7103H noise sources being surface mount, having a small footprint and available on
tape and reel, make them ideal for production manufacturing. Traditionally packaged noise
sources have been large and costly rendering them less suitable for all but the more expensive,
exotic systems. Noise can now be thought of as lower cost, more reliable, smaller and an easier
to implement alternative to costly microprocessor based solutions such as PN generators, arbtrary
waveform generators and DSP processors.
S
PECIFICATIONS
SMN7103 T
YPICAL
D
ATA
• Frequency: 100 Hz to 500 kHz
• Impedance: 1100 ohm
• Noise Power (N): -8 dBm
• Bias: 12 Vdc (Internally Regulated)
• Peak Factor: 5:1
• Amplitude:
Note: Data measured in 50 ohm
load impedance. Add 14 dB to this
amplitude data for 1000 ohm load
impedance.
V
P-P
= 2.0 (min), 2.4 (typ)
V
RMS
= 100mV (min)
120mV
RMS
(typ)
• Current Draw: 15mA (max)
• Operating Temp:
• Storage Temp:
-55 to +85 C
-55 to +125 C
A
PPLICATION
N
OTE
C
OMMON
N
OISE
A
PPLICATIONS
1. Baseband Signal Simulation:
Signal impariments can be modeled by using a
noise source where ever a Gaussian process
is required. By feeding the output of the noise
source into the control lines of devices such as
attenuators, phase shifters or the LO port of a
mixer, one can simulate various impairments
such as rain fade, Rayleigh fading, etc....
2. Random Number Generation for
Encryption:
Noise sources being truly random (not
pseudorandom) give the ultimate in secure
communication because of their ability to gen-
erate a truly random number pattern. This can
be used to seed an encryption key for authen-
tication. The noise signal can be fed directly
into an A/D converter for sampling or a simpler
techniques might use a comparator. Further
shaping of the noise is often employed
whether by analog techniques if in front of the
A/D converter or afterwards using DSP.
MICRONETICS, HUDSON, NH 03051 / TEL: 603-883-2900 / FAX: 603-882-8987 / NOISESALES@MICRONETICS.COM
WWW.MICRONETICS.COM
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
MICRONETICS, HUDSON, NH 03051 / TEL: 603-883-2900 / FAX: 603-882-8987 / NOISESALES@MICRONETICS.COM
WWW.MICRONETICS.COM
