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HSP45102
12-Bit Numerically Controlled Oscillator
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.
Features
• 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)
Applications
• Direct Digital Synthesis
• Modulation
• PSK Communications
• Related Products
- HI5731 12-Bit, 100MHz D/A Converter
Ordering Information
PART NUMBER PART MARKING
TEMP.
RANGE (°C) PACKAGE
PKG.
DWG. #
HSP45102SC-33 HSP45102SC-33 0 to +70 28 Ld SOIC (300 mil) M28.3
HSP45102SC-33Z (Note) HSP45102SC-33Z 0 to +70 28 Ld SOIC (300 mil) (Pb-free) M28.3
HSP45102SC-40 HSP45102SC -40 0 to +70 28 Ld SOIC (300 mil) M28.3
HSP45102SC-40Z (Note) HSP45102SC-40Z 0 to +70 28 Ld SOIC (300 mil)(Pb-free) M28.3
HSP45102SI-3396 HSP45102SI -33 0 to +70 28 Ld SOIC (300 mil) (Tape and Reel) M28.3
HSP45102SI-33Z (Note) HSP45102SI-33Z 0 to +70 28 Ld SOIC (300 mil) (Pb-free) M28.3
NOTE: Intersil Pb-free plus anneal products employ special Pb-free material sets; molding compounds/die attach materials and 100% matte tin plate
termination finish, which are RoHS compliant and compatible with both SnPb and Pb-free soldering operations. Intersil Pb-free products are MSL
classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.
Data Sheet April 25, 2007 FN2810.9
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774
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