STEL-1175

STEL-1175 Data Sheet www.DataSheet4U.com STEL-1175+125 (125 MHz) 32-Bit Resolution CMOS Phase Modulated Numerically Controlled Oscillator R FEATURES s VERY HIGH CLOCK FREQUENCY - 125 MHz MAXIMUM OVER FULL MILITARY TEMPERATURE RANGE HIGH FREQUENCY RESOLUTION - 32-BITS, 30 milli-Hz @ 125 MHz WIDE OUTPUT BANDWIDTH - 0 TO 50 MHz @ 125 MHz CLOCK SHORT CLOCK TO OUTPUT DELAY FOR DIRECT CLOCK CONNECT TO 1175 AND DAC PRECISION PHASE MODULATION TYPICAL APPLICATIONS s s s s FREQUENCY SYNTHESIZERS PSK MODULATORS DIGITAL SIGNAL PROCESSORS FAST HOPPED FREQUENCY SOURCES s s s FUNCTIONAL DESCRIPTION The STEL-1175 Modulated Numerically Controlled Oscillator (MNCO) uses digital techniques to provide a cost-effective solution for low noise signal sources. The device can operate at clock frequency up to 125 MHz and provides high frequency resolution and high spectral purity of outputs up to 50 MHz. The STEL-1175 also features phase modulation at rates up to 25% of the clock frequency. The 12-bit output can be selected to be a sine or cosine function, so that two STEL-1175 NCOs can be used to generate quadrature signals with independent phase modulation. Two independent frequency control registers are provided, allowing high speed frequency hopping or binary FSK at rates to 25% of the clock frequency. The device combines low power 0.5µ CMOS technology with a unique architectural design resulting in a power efficient, high-speed sinusoidal waveform generator able to achieve fine tuning reso...