SMN7103H 1/2 INCH SURFACE MOUNT AMPLIFIED NOISE SOURCE 100 HZ TO 500 KHZ 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. 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 TYPICAL DATA • Frequency: 100 Hz to 500 kHz • Impedance: 1100 ohm • Noise Power (N): -8 dBm • Bias: 12 Vdc (Internally Regulated) • Peak Factor: 5:1 • Amplitude: VP-P = 2.0 (min), 2.4 (typ) VRMS = 100mV (min) Note: Data measured in 50 ohm load impedance. Add 14 dB to this amplitude data for 1000 ohm load impedance. 120mVRMS (typ) • Current Draw: 15mA (max) • Operating Temp: -55 to +85 C • Storage Temp: -55 to +125 C APPLICATION NOTE 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 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 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 / [email protected] WWW.MICRONETICS.COM SMN7103H SURFACE MOUNT AMPLIFIED NOISE SOURCE HOW TO ORDER Model # USEFUL NOISE EQUATIONS S M N 7 1 0 3 H- D 1 C Indicate Bulk or Tape and Reel when ordering in quantity Model # 100 HZ TO 500 KHZ Converting ENR to noise spectral density (N0): 0 dB ENR = -174 dBm/Hz S M N 7 1 0 3 H- D 1 C - E V A L For populated evaluation board PACKAGE OUTLINE DRAWING Calculating noise power in a given bandwidth (BW) from noise spectral density: Power (dBm)=N0+10Log(BW) Calculating VRMS from noise power and impedance: VRMS=10 [N + 10Log(R)-30dB]/20 Calculating noise power from VRMS and impedance: N=20Log (VRMS)-10Log(R)+30 dB Where: N=Power in dBm R=Impedance in ohms BW=Bandwidth in Hz N0=Power Spectral Density in dBm/Hz MICRONETICS, HUDSON, NH 03051 / TEL: 603-883-2900 / FAX: 603-882-8987 / [email protected] WWW.MICRONETICS.COM