SMN7108 Datasheet, PDF (1/3 Pages) Micronetics, Inc. – 1/2 INCH SURFACE MOUNT AMPLIFIED NOISE SOURCE

SMN7108
1/2 INCH SURFACE MOUNT AMPLIFIED NOISE SOURCE
SMN7108 TYPICAL DATA
50 KHZ TO 100 MHZ
DESCRIPTION
The SMN7108 noise module is designed
for a wide range of applications.
It features high noise output amplitude
for uses ranging from encryption to jam-
ming. All biasing and amplification circuit-
ry 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.
SUITABLE FOR HIGH VOLUME
PRODUCTS:
The SMN7108 noise sources being sur-
face 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 imple-
ment alternative to costly microprocessor
based solutions such as PN generators,
arbitrary waveform generators and DSP
processors.
APPLICATION NOTE
Common Noise Applications
SPECIFICATIONS
• Frequency:
50 kHz to 100 MHz
• Noise Power Spectral Density (No):
1. Built-in IF Testing: Highly stable flat over frequency noise sources serve to provide
built-in test for an IF subsystem. By injecting a stable signal reference through the IF
chain, one can calibrate the gain/loss and frequency response. In addition, the noise
source can be used to set up Eb/No for built-in stimulated BER testing of digital demod-
ulation.
2. Barrage Jamming: The noise source is fed into the tuning port of a VCO via a bias
tee and a positive DC voltage. The random nature of noise makes the output of the
VCO to hop around in a given frequency band randomly making an ideal jamming sig-
nal. Further circuitry can be used between the noise source and tuning port to shape
the noise probability density function (PDF) for the desired jamming effect.
-87 dBm/Hz (min)
• Noise Power (N): -7 dBm
• Spectral Flatness: 2 dB (total window)
• Bias:
12 Vdc
Internally Regulated
• Current Draw: 50 mA Max
• Peak Factor: 5:1
• Operating Temp: -55 to +85 C
3. Random Number Generation for Encryption: Noise sources being truly random (not
pseudorandom) give the ultimate in secure communication because of their ability to
generate a truly random number pattern. This can be used to seed an encryption key
for authentication. The noise signal can be fed directly into an A/D converter for sam-
pling or a simpler techniques might use a comparator. Further shaping of the noise is
often employed whether either analog if in front of the A/D converter or afterwards using
DSP.
• Storage Temp:
-55 to 125 C
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