HSP45106883 Datasheet, PDF (1/6 Pages) Intersil Corporation – 16-Bit Numerically Controlled Oscillator

TM
Data Sheet
HSP45106/883
May 1999
FN2815.3
16-Bit Numerically Controlled Oscillator
The Intersil HSP45106/883 is a high performance 16-bit
quadrature Numerically Controlled Oscillator (NCO16). The
NCO16 simplifies 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
HSP45106/883 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 0.006Hz at 25.6MHz. 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.
The output of the PFCS is a 32-bit phase argument which is
input to the Sine/Cosine Section for conversion into
sinusoidal amplitude. The outputs of the Sine/Cosine
Section are two 16-bit quadrature signals. The spurious free
dynamic range of this complex vector is greater than 90dBc.
For added flexibility when using the NCO16 in conjunction
with DAC’s, a choice of either parallel of serial outputs with
either two’s complement or offset binary encoding is
provided. In addition, a synchronization signal is available
which signals serial word boundaries.
Features
• This Circuit is Processed in Accordance to MIL-STD-883
and is Fully Conformant Under the Provisions of
Paragraph 1.2.1.
• 25.6MHz Clock Rate
• 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’s Complement or Offset Binary
• <0.006Hz Tuning Resolution at 25.6MHz
• Serial or Parallel Outputs
• Spurious Frequency Components < -90dBc
• 16-Bit Microprocessor Compatible Control Interface
Applications
• Direct Digital Synthesis
• Quadrature Signal Generation
• Modulation - FM, FSK, PSK (BPSK, QPSK, 8PSK)
• Precision Signal Generation
Ordering Information
PART NUMBER
TEMP.
RANGE (^oC) PACKAGE
HSP45106GM-25/883 -55 to 125 85 Ld PGA
PKG.
NO.
G85.A
Block Diagram
MICROPROCESSOR
INTERFACE
DISCRETE
CONTROL SIGNALS
CLOCK
PHASE/
FREQUENCY
CONTROL
SECTION
SIN/COS
ARGUMENT
32
SINE/
COSINE
SECTION
SINE
16
COSINE ¹⁶
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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