- 33MHz, 40MHz Versions
- 32-Bit Frequency Control
- BFSK, QPSK Modulation
- Serial Frequency Load
- 12-Bit Sine Output
- Offset Binary Output Format
- 0.009Hz Tuning Resolution at 40MHz
- Spurious Frequency Components <-69dBc
- Fully Static CMOS
- Low Cost
- Pb-Free Plus Anneal Available (RoHS Compliant)
The Intersil HSP45102 is Numerically Controlled Oscillator (NCO12) with 32-bit frequency resolution and 12-bit output. With over 69dB of spurious free dynamic range and worst case frequency resolution of 0.009Hz, the NCO12 provides significant accuracy for frequency synthesis solutions at a competitive price.
The frequency to be generated is selected from two frequency control words. A single control pin selects which word is used to determine the output frequency. Switching from one frequency to another occurs in one clock cycle, with a 6 clock pipeline delay from the time that the new control word is loaded until t4-he new frequency appears on the output.
Two pins, P0-1, are provided for phase modulation. They are encoded and added to the top two bits of the phase accumulator to offset the phase in 90° increments.
The 13-bit output of the Phase Offset Adder is mapped to the sine wave amplitude via the Sine ROM. The output data format is offset binary to simplify interfacing to D/A converters. Spurious frequency components in the output sinusoid are less than -69dBc.
The NCO12 has applications as a Direct Digital Synthesizer and modulator in low cost digital radios, satellite terminals, and function generators.
- Direct Digital Synthesis
- PSK Communications
- Related Products
- HI5731 12-Bit, 100MHz D/A Converter
|Modulation Formats||QPSK, FSK||QPSK, FSK|
|Input Rate (MSPS)||40||125|
|Input Data||12 Bits||14 Bits|
|Spectral Purity (dBc)||69|
|Frequency Resolution (Hz)||0.009 @ 32-Bits||48|
|Output||12-Bits, Sine 40MHz||Analog|
12-Bit Numerically Controlled Oscillator
20 Dec 2017
|20 Dec 2017||429 KB|
|TB318: The NCO as a Stable, Accurate Synthesizer|
The NCO as a Stable, Accurate Synthesizer
09 Jan 2015
|09 Jan 2015||128 KB|