Numerically Controlled Oscillator/Modulator

The Intersil HSP45116 combines a high performance quadrature Numerically Controlled Oscillator (NCO) and a high speed 16-bit Complex Multiplier/Accumulator (CMAC) on a single IC. This combination of functions allows a complex vector to be multiplied by the internally generated (cos, sin) vector for quadrature modulation and demodulation. As shown in the Block Diagram, the HSP45116 is divided into three main sections. The Phase/Frequency Control Section (PFCS) and the Sine/Cosine Section together form a complex NCO. The CMAC multiplies the output of the Sine/ Cosine Section with an external complex vector.

Features

• NCO and CMAC on One Chip

• 15MHz, 25.6MHz, 33MHz Versions

• 32-Bit Frequency Control

• 16-Bit Phase Modulation

• 16-Bit CMAC

• 0.008Hz Tuning Resolution at 33MHz

• Spurious Frequency Components < -90dBc

• Fully Static CMOS

Applications

• Frequency Synthesis

• Modulation - AM, FM, PSK, FSK, QAM

• Demodulation, PLL

• Phase Shifter

• Polar to Cartesian Conversions