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SMDM70 Dithering Modules 200 kHz - 2 MHz - 30868 SMDM-70-TTLD

ITHERING

M

ODULES

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PECIFICATIONS Analog Signal Path: Pass Band Frequency: 60-80 MHzInsertion Loss: 1.0dB
max Impedance: 50 ohm VSWR: 1.4:1
max LO Rejection: 55dB
min @ f>450MHz Noise Output: Frequency: 200 kHz - 2.0 MHz Noise Flatness: 2 dB P-P
max Noise power: -40 dBm
min ,-34 dBm
max Low pass noise rejection:-150 dBm/Hz

SMDM-70-TTL O

(other frequencies upon request)

UTPUT

C

HARACTERISTICS

and eliminates the need to design specialcircuitry for the noise biasing, amplification and filtering as well as combin- ing the signal to the out of band noise.

@ 5.0 MHz-Total noise rejection @ f>15 MHz

Micronetics’dithering module is designed as an easy way to eliminate spurscaused by quantization errors in high speed A/D converters. This module feature a patent pending technology to efficiently combine low pass filtered noise with the analog signal, resulting in low signal insertion loss and low power consumption. The module is designed for 70 MHz analog signals

General Specs: Operating Temp: -40 to +85 degC Storage Temp: -55 to +100 degC Supply:15V + 0.5V @ 75 mA
max Control Logic TTL:Logic 1: Noise On
(internal pull up) 2.8 - 5.5 V Logic 0: Noise Off0 - 0.75 V

D

ESCRIPTION

The dithering module is a two port device with an analog signal input and a signal + noise output. The complete noise generating circuitry is contained within this module. The dithering module is specified by two paths, one being the analog signal path and the other being the noise output of the combined signal + noise path. The module also features built in LO rejec- tion filtering. How to order:

SMDM-70-TTL Dithering module, suface mount SMDM-70-TTL-EVAL

C

OMMON

N

OISE

C

ONVERSIONS coaxial connectorizd, populated evaluation board

? N = N

o

+ 10*LOG (BW)? N

o

= 20*LOG ( V

RMS

/Hz)? N = 20*LOG(V

RMS

) - 10*LOG (R) + 30 dB where:BW = bandwidth in hertz R = impedance in ohms N = power in dBm No= power spectral density in dBm/Hz

26 HAMPSHIRE DRIVE/ HUDSON, NH 03051 / TEL: 603-883-2900 / FAX: 603-882-8987 / NOISESALES@MICRONETICS.COM WWW.MICRONETICS.COM