16-Bit Numerically Controlled Oscillator
The Intersil HSP45106 is a high performance 16-bit quadrature Numerically Controlled Oscillator NCO16 . The NCO16 simpli& 64257 es applications requiring frequency and phase agility such as frequency-hopped modems, PSK modems, spread spectrum communications, and precision signal generators. As shown in the block diagram, the HSP45106 is divided into a Phase/Frequency Control Section PFCS and a Sine/Cosine Section.
The inputs to the Phase/Frequency Control Section consist of a microprocessor interface and individual control lines. The frequency resolution is 32 bits, which provides for resolution of better than 0.008Hz at 33MHz. User programmable center frequency and offset frequency registers give the user the capability to perform phase
coherent switching between two sinusoids of different frequencies. Further, a programmable phase control register
allows for phase control of better than 0.006o. In applications requiring up to 8-level PSK, three discrete inputs are provided to simplify implementation.
25.6MHz, 33MHz Versions
32-Bit Center and Offset Frequency Control
16-Bit Phase Control
8 Level PSK Supported Through Three Pin Interface
Simultaneous 16-Bit Sine and Cosine Outputs
Output in Two& 8217 s Complement or Offset Binary
<0.008Hz Tuning Resolution at 33MHz
Serial or Parallel Outputs
Spurious Frequency Components <-90dBc
16-Bit Microprocessor Compatible Control Interface |
