DATASHEET

HSP45102
®
Data Sheet
April 25, 2007
12-Bit Numerically Controlled Oscillator
Features
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.
• 33MHz, 40MHz Versions
FN2810.9
• 32-Bit Frequency Control
• BFSK, QPSK Modulation
• Serial Frequency Load
• 12-Bit Sine Output
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.
• 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.
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 1999, 2004, 2005, 2007. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
HSP45102
Block Diagram
CLK
PO-1
MSB/LSB
SFTEN
SD
SCLK
32
FREQUENCY
CONTROL
SECTION
32
PHASE
ACCUMULATOR
13
PHASE
OFFSET
ADDER
13
SINE
ROM
12
OUT0-11
LOAD
TXFR
ENPHAC
SEL_L/M
Pinout
HSP45102
(28 LEAD SOIC)
TOP VIEW
2
OUT6 1
28 OUT5
OUT7 2
27 OUT4
OUT8 3
26 OUT3
OUT9 4
25 OUT2
OUT10 5
24 OUT1
OUT11 6
23 OUT0
GND 7
22 VCC
VCC 8
21 GND
SEL_L/M 9
20 P0
SFTEN 10
19 P1
MSB/LSB 11
18 LOAD
ENPHAC 12
17 TXFR
SD 13
16 CLK
SCLK 14
15 GND
FN2810.9
April 25, 2007
HSP45102
Pin Description
NAME
TYPE
DESCRIPTION
VCC
+5V power supply pin.
GND
Ground
P0-1
I
Phase modulation inputs (become active after a pipeline delay of four clocks). A phase shift of 0°, 90°,
180°, or 270° can be selected as shown in Table 1.
CLK
I
NCO clock. (CMOS level)
SCLK
I
This pin clocks the frequency control shift register.
SEL_L/M
I
A high on this input selects the least significant 32 bits of the 64-bit frequency register as the input to
the phase accumulator; a low selects the most significant 32 bits.
SFTEN
I
The active low input enables the shifting of the frequency register.
MSB/LSB
I
This input selects the shift direction of the frequency register. A low on this input shifts in the data LSB
first; a high shifts in the data MSB first.
ENPHAC
I
This pin, when low, enables the clocking of the Phase Accumulator. This input has a pipeline delay of
four clocks.
SD
I
Data on this pin is shifted into the frequency register by the rising edge of SCLK when SFTEN is low.
TXFR
I
This active low input is clocked onto the chip by CLK and becomes active after a pipeline delay of four
clocks. When low, the frequency control word selected by SEL_L/M is transferred from the frequency
register to the phase accumulator’s input register.
LOAD
I
This input becomes active after a pipeline delay of five clocks. When low, the feedback in the phase
accumulator is zeroed.
OUT0-11
O
Output data. OUT0 is LSB. Unsigned.
All inputs are TTL level, with the exception of CLK.
Overline designates active low signals.
3
FN2810.9
April 25, 2007
HSP45102
PHASE OFFSET ADDER
A
D
D
E
R
R.P0-1
LOAD
CLK
/
R.ENPHAC
SINE
ROM
12
/
CLK
2-DLY
R
E
G
OUT0-11
R.TXFR
R.LOAD
CLK
R
E
G
/
‘0’
FRCTRL
0-31
32
FRCTRL
32-63
/ 32
R.TXFR
CLK
SD
SCLK
A
D
D
E
R
1
32
MUX
/
/ 32
ACCUMULATOR
INPUT
REGISTER
0
64-BIT
SHIFT
REG
/ 32
R.LOAD
FREQUENCY
CONTROL
SECTION
/
32
1
TXFR
4-DLY
R
E
G
13 MSBs
R
E
G
13
MUX
ENPHAC
R.P0-1
/
0
P0-1
R
E
G
13
/
CLK
R
E
G
/ 32
/ 32
R.ENPHAC
CLK
SFTEN
MSB/LSB
R
E
G
/ 32
(HIGH SELECTS FRCTRL0-31, LOW SELECTS FRCTRL32-63)
SEL_L/M
PHASE ACCUMULATOR
FIGURE 1. NCO-12 FUNCTIONAL BLOCK DIAGRAM
Functional Description
The NCO12 produces a 12-bit sinusoid whose frequency
and phase are digitally controlled. The frequency of the sine
wave is determined by one of two 32-bit words. Selection of
the active word is made by SEL_L/M. The phase of the
output is controlled by the two-bit input P0-1, which is used
to select a phase offset of 0°, 90°, 180°, or 270°.
As shown in the Block Diagram, the NCO12 consists of a
Frequency Control Section, a Phase Accumulator, a Phase
Offset Adder and a Sine ROM. The Frequency Control
section serially loads the frequency control word into the
frequency register. The Phase Accumulator and Phase
Offset Adder compute the phase angle using the frequency
control word and the two phase modulation inputs. The Sine
ROM generates the sine of the computed phase angle. The
format of the 12-bit output is offset binary.
Frequency Control Section
The Frequency Control Section shown in Figure 1 serially
loads the frequency data into a 64-bit, bidirectional shift
register. The shift direction is selected with the MSB/LSB
input. When this input is high, the frequency control word on
the SD input is shifted into the register MSB first. When
MSB/LSB is low the data is shifted in LSB first. The register
shifts on the rising edge of SCLK when SFTEN is low. The
timing of these signals is shown in Figures 2A and 2B.
the phase modulation bits P0-1. The architecture is shown in
Figure 1. The most significant 13 bits of the 32-bit phase
accumulator are summed with the two-bit phase offset to
generate the 13-bit phase input to the Sine Rom. A value of
0 corresponds to 0°, a value of 1000 hexadecimal
corresponds to a value of 180°.
The phase accumulator advances the phase by the amount
programmed into the frequency control register. The output
frequency is equal to:
f LO = ( N × f CLK ⁄ 2
32
), or
⎛ f OUT⎞ 32
,
N = INT ⎜ -------------⎟ 2
⎝ f CLK ⎠
(EQ. 1)
(EQ. 2)
where N is the 32 bits of frequency control word that is
programmed. INT[•] is the integer of the computation. For
example, if the control word is 20000000 hexadecimal and the
clock frequency is 30MHz, then the output frequency would
be fCLK/8, or 3.75MHz.
Phase Accumulator Section
The frequency control multiplexer selects the least
significant 32 bits from the 64-bit frequency control register
when SEL_L/M is high, and the most significant 32 bits
when SEL_L/M is low. When only one frequency word is
desired, SEL_L/M and MSB/LSB must be either both high or
both low. This is due to the fact that when a frequency
control word is loaded into the shift register LSB first, it
enters through the most significant bit of the register. After
32 bits have been shifted in, they will reside in the 32 most
significant bits of the 64-bit register.
The phase accumulator and phase offset adder compute the
phase of the sine wave from the frequency control word and
When TXFR is asserted, the 32 bits selected by the frequency
control multiplexer are clocked into the phase accumulator
The 64 bits of the frequency register are sent to the Phase
Accumulator Section where 32 bits are selected to control
the frequency of the sinusoidal output.
4
FN2810.9
April 25, 2007
HSP45102
input register. At each clock, the contents of this register are
summed with the current contents of the accumulator to step to
the new phase. The phase accumulator stepping may be
inhibited by holding ENPHAC high. The phase accumulator
may be loaded with the value in the input register by asserting
LOAD, which zeroes the feedback to the phase accumulator.
TABLE 1. PHASE MAPPING
P0-1 CODING
The phase adder sums the encoded phase modulation bits
P0-1 and the output of the phase accumulator to offset the
phase by 0°, 90°, 180° or 270°. The two bits are encoded to
produce the phase mapping shown in Table 1. This phase
mapping is provided for direct connection to the in-phase
and quadrature data bits for QPSK modulation.
P1
P0
PHASE SHIFT (DEGREES)
0
0
0
0
1
90
1
0
270
1
1
180
ROM Section
The ROM section generates the 12-bit sine value from the
13-bit output of the phase adder. The output format is offset
binary and ranges from 001 to FFF hexadecimal, centered
around 800 hexadecimal.
SCLK
SD
2
1
0
61
63
62
SFTEN
MSB/LSB
FIGURE 2A. FREQUENCY LOADING ENABLED BY SFTEN
SCLK
SD
2
1
0
61
62
63
SFTEN
MSB/LSB
FIGURE 2B. FREQUENCY LOADING CONTROLLED BY SCLK
CLK
1
2
3
4
5
6
7
8
9
10
11
LOAD
TXFR
ENPHAC
SEL_L/M
OUT0-11
NEW
DATA
FIGURE 3. I/O TIMING
5
FN2810.9
April 25, 2007
HSP45102
Absolute Maximum Ratings TA = +25°C
Thermal Information
Supply Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +6.0V
Input, Output or I/O Voltage Applied . . . . . GND -0.5V to VCC +0.5V
ESD Classification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Class 1
Thermal Resistance (Typical, Note 1)
θJA (°C/W)
SOIC Package . . . . . . . . . . . . . . . . . . . . . . . . . . .
70
Maximum Junction Temperature . . . . . . . . . . . . . . . . . . . . . . +150°C
Maximum Storage Temperature Range . . . . . . . . . .-65°C to +150°C
Pb-free reflow profile . . . . . . . . . . . . . . . . . . . . . . . . . .see link below
http://www.intersil.com/pbfree/Pb-FreeReflow.asp
Operating Conditions
Operating Voltage Range (Commercial, Industrial) . . +4.75V to +5.25V
Operating Temperature Range (Commercial) . . . . . . . 0°C to +70°C
Operating Temperature Range (Industrial) . . . . . . . .-40°C to +85°C
Die Characteristics
Backside Potential . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VCC
CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the
device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
NOTE:
1. θJA is measured with the component mounted on an evaluation PC board in free air.
DC Electrical Specifications
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
MAX
UNITS
Logical One Input Voltage
VIH
VCC = 5.25V
2.0
-
V
Logical Zero Input Voltage
VIL
VCC = 4.75V
-
0.8
V
High Level Clock Input
VIHC
VCC = 5.25V
3.0
-
V
Low Level Clock Input
VILC
VCC = 4.75V
-
0.8
V
Output HIGH Voltage
VOH
IOH = -400μA, VCC = 4.75V
2.6
-
V
Output LOW Voltage
VOL
IOL = +2.0mA, VCC = 4.75V
-
0.4
V
-10
10
μA
Input Leakage Current
II
VIN = VCC or GND, VCC = 5.25V
Standby Power Supply Current
ICCSB
VIN = VCC or GND, VCC = 5.25V, Note 4
-
500
μA
Operating Power Supply Current
ICCOP
f = 33MHz, VIN = VCC or GND
VCC = 5.25V, Notes 2 and 4
-
99
mA
MIN
MAX
UNITS
-
10
pF
-
10
pF
Capacitance TA = +25°C, Note 3
PARAMETER
SYMBOL
Input Capacitance
CIN
Output Capacitance
CO
TEST CONDITIONS
FREQ = 1MHz, VCC = Open. All
measurements are referenced to device
ground
NOTES:
2. Power supply current is proportional to operating frequency. Typical rating for ICCOP is 3mA/MHz.
3. Not tested, but characterized at initial design and at major process/design changes.
4. Output load per test load circuit with switch open and CL = 40pF.
6
FN2810.9
April 25, 2007
HSP45102
AC Electrical Specifications
VCC = 5.0V ±5%, TA = 0°C to +70°C, TA = -40°C to +85°C (Note 5)
-33 (33MHz)
PARAMETER
SYMBOL
NOTES
-40 (40MHz)
MIN
MAX
MIN
MAX
UNITS
Clock Period
tCP
30
-
25
-
ns
Clock High
tCH
12
-
10
-
ns
Clock Low
tCL
12
-
10
-
ns
SCLK High/Low
tSW
12
-
10
-
ns
Setup Time SD to SCLK Going High
tDS
12
-
12
-
ns
Hold Time SD from SCLK Going High
tDH
0
-
0
-
ns
Setup Time SFTEN, MSB/LSB to SCLK Going High
tMS
15
-
12
-
ns
Hold Time SFTEN, MSB/LSB from SCLK Going High
tMH
0
-
0
-
ns
Setup Time SCLK High to CLK Going High
tSS
16
-
15
-
ns
Setup Time P0-1 to CLK Going High
tPS
15
-
12
-
ns
Hold Time P0-1 from CLK Going High
tPH
1
-
1
-
ns
Setup Time LOAD, TXFR, ENPHAC, SEL_L/M
to CLK Going High
tES
15
-
13
-
ns
Hold Time LOAD, TXFR, ENPHAC, SEL_L/M
from CLK Going High
tEH
1
-
1
-
ns
CLK to Output Delay
tOH
2
15
2
13
ns
Output Rise, Fall Time
tRF
8
-
8
-
ns
Note 6
Note 7
NOTES:
5. AC testing is performed as follows: Input levels (CLK Input) 4.0V and 0V; Input levels (all other inputs) 0V and 3.0V; Timing reference levels
(CLK) 2.0V; All others 1.5V. Output load per test load circuit with switch closed and CL = 40pF. Output transition is measured at VOH > 1.5V and
VOL < 1.5V.
6. If TXFR is active, care must be taken to not violate setup and hold times as data from the shift registers may not have settled before CLK occurs.
7. Controlled via design or process parameters and not directly tested. Characterized upon initial design and after major process and/or design
changes.
AC Test Load Circuit
DUT
S1
CL (NOTE)
±
SWITCH S1 OPEN FOR ICCSB AND ICCOP
IOH
1.5V
IOL
EQUIVALENT CIRCUIT
NOTE: Test head capacitance.
7
FN2810.9
April 25, 2007
HSP45102
Waveforms
tCP
tCH
tCL
CLK
P0-1
LOAD, TXFR,
tPS
tPH
tES
tEH
ENPHAC, SEL_L/M
tRF
tOH
OUT0-11
tSW
tSS
tDS
tDH
tSW
SCLK
SD
tMS
tMH
MSB/LSB,
SFTEN
FIGURE 4.
8
FN2810.9
April 25, 2007
HSP45102
Small Outline Plastic Packages (SOIC)
M28.3 (JEDEC MS-013-AE ISSUE C)
N
28 LEAD WIDE BODY SMALL OUTLINE PLASTIC PACKAGE
INDEX
AREA
H
0.25(0.010) M
B M
INCHES
E
SYMBOL
-B-
1
2
3
L
SEATING PLANE
-A-
h x 45o
A
D
-C-
e
A1
B
C
0.10(0.004)
0.25(0.010) M
C A M
B S
MILLIMETERS
MIN
MAX
NOTES
A
0.0926
0.1043
2.35
2.65
-
0.0040
0.0118
0.10
0.30
-
B
0.013
0.0200
0.33
0.51
9
C
0.0091
0.0125
0.23
0.32
-
D
0.6969
0.7125
17.70
18.10
3
E
0.2914
0.2992
7.40
7.60
4
0.05 BSC
10.00
h
0.01
0.029
0.25
0.75
5
L
0.016
0.050
0.40
1.27
6
8o
0o
28
0o
10.65
-
0.394
α
0.419
1.27 BSC
H
N
NOTES:
MAX
A1
e
α
MIN
28
1. Symbols are defined in the “MO Series Symbol List” in Section 2.2
of Publication Number 95.
-
7
8o
Rev. 0 12/93
2. Dimensioning and tolerancing per ANSI Y14.5M-1982.
3. Dimension “D” does not include mold flash, protrusions or gate
burrs. Mold flash, protrusion and gate burrs shall not exceed
0.15mm (0.006 inch) per side.
4. Dimension “E” does not include interlead flash or protrusions. Interlead flash and protrusions shall not exceed 0.25mm (0.010
inch) per side.
5. The chamfer on the body is optional. If it is not present, a visual
index feature must be located within the crosshatched area.
6. “L” is the length of terminal for soldering to a substrate.
7. “N” is the number of terminal positions.
8. Terminal numbers are shown for reference only.
9. The lead width “B”, as measured 0.36mm (0.014 inch) or greater
above the seating plane, shall not exceed a maximum value of
0.61mm (0.024 inch)
10. Controlling dimension: MILLIMETER. Converted inch dimensions are not necessarily exact.
All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9000 quality systems.
Intersil Corporation’s quality certifications can be viewed at www.intersil.com/design/quality
Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without
notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and
reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result
from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.
For information regarding Intersil Corporation and its products, see www.intersil.com
9
FN2810.9
April 25, 2007
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