ICST ICS840001CK-32T Femtoclocks-tm crystal-to lvcmos/lvttl frequency synthesizer Datasheet

PRELIMINARY
Integrated
Circuit
Systems, Inc.
ICS840001-32
FEMTOCLOCKS™ CRYSTAL-TOLVCMOS/LVTTL FREQUENCY SYNTHESIZER
GENERAL DESCRIPTION
FEATURES
The ICS840001-32 is a two output LVCMOS/
LVTTL Synthesizer and is a member of the
HiPerClockS™
HiPerClocks TM family of high perfor mance
devices from ICS. The device uses a 40MHz
crystal to provide a 40MHz reference clock
output and to synthesize a 100MHz or 106.25MHz
output. The ICS840001-32 has excellent <1ps phase
jitter performance over the 637kHz – 5MHz integration
range. The ICS840001-32 is packaged in a 3mm x 3mm
16-pin VFQFN, making it ideal for use on space constrained boards.
• One LVCMOS/LVTTL output, 15Ω typical output
impedence and one reference clock output
ICS
• 40MHz, 10pF parallel resonant crystal
• Output frequencies: 100MHz or 106.25MHz
• RMS phase jitter @ 106.25MHz, using a 40MHz crystal
(637kHz - 5MHz): 0.78ps (typical)
• 3.3V operating supply
• 0°C to 70°C ambient operating temperature
• Availabe in both standard and lead-free RoHS-compliant
packages
FUNCTION TABLE
SEL Input
1
106.25
40
REF_OUT
Synthesizer
Q
XTAL_OUT
SEL
(Pullup)
16 15 14 13
12
XTAL_OUT 2
11
VDDO_Q
XTAL_IN 3
10
VDD
SEL 4
9
5
6
7
8
GND
OSC
VDD 1
VDDO_REF_OUT
XTAL_IN
100MHz or
106.25MHz
GND
40MHz
nc
VDDA
PIN ASSIGNMENT
nc
BLOCK DIAGRAM
nc
40
0
Outputs
Q Output
REF_OUT
Frequency (MHz)
Frequency (MHz)
100
40
GND
Inputs
Crystal Frequency
(MHz)
40
Q
REF_OUT
ICS840001-32
16-Lead VFQFN
3mm x 3mm x 0.95 package body
K Package
Top View
The Preliminary Information presented herein represents a product in prototyping or pre-production. The noted characteristics are based on
initial product characterization. Integrated Circuit Systems, Incorporated (ICS) reserves the right to change any circuitry or specifications
without notice.
840001CK-32
www.icst.com/products/hiperclocks.html
REV. A NOVEMBER 23, 2005
1
PRELIMINARY
Integrated
Circuit
Systems, Inc.
ICS840001-32
FEMTOCLOCKS™ CRYSTAL-TOLVCMOS/LVTTL FREQUENCY SYNTHESIZER
TABLE 1. PIN DESCRIPTIONS
Number
Name
1, 10
Power
4
VDD
XTAL_OUT,
XTAL_IN
SEL
5, 8, 13
GND
Power
6, 14, 15
nc
Unused
7
VDDO_REF_OUT
Power
9
REF_OUT
Output
11
VDDO_Q
Power
12
Q
Output
16
VDDA
Power
2, 3
Type
Description
Input
Input
Pullup
Core supply pin.
Crystal oscillator interface. XTAL_IN is the input.
XTAL_OUT is the output.
Select input. LVCMOS/LVTTL interface levels.
Power supply ground.
No connect.
Output supply pin for REF_OUT output
Single-ended three-state reference clock output.
LVCMOS/LVTTL interface levels. 15Ω typical output impedance.
Output supply pin for Q output.
Single-ended clock output. LVCMOS/LVTTL interface levels.
15Ω typical output impedance.
Analog supply pin.
NOTE: Pullup refers to internal input resistors. See Table 2, Pin Characteristics, for typical values.
TABLE 2. PIN CHARACTERISTICS
Symbol
Parameter
CIN
Input Capacitance
CPD
Power Dissipation Capacitance
RPULLUP
ROUT
840001CK-32
Test Conditions
Minimum
Typical
Maximum
Units
4
pF
8
pF
Input Pullup Resistor
51
kΩ
Output Impedance
15
Ω
VDD, VDDA, VDDO_REF_OUT, VDDO_Q =
3.465V
www.icst.com/products/hiperclocks.html
2
REV. A NOVEMBER 23, 2005
PRELIMINARY
Integrated
Circuit
Systems, Inc.
ICS840001-32
FEMTOCLOCKS™ CRYSTAL-TOLVCMOS/LVTTL FREQUENCY SYNTHESIZER
ABSOLUTE MAXIMUM RATINGS
Supply Voltage, VDD
4.6V
Inputs, VI
-0.5V to VDD + 0.5 V
Outputs, VO
-0.5V to VDDO + 0.5V
Package Thermal Impedance, θJA
51.5°C/W (0 lfpm)
Storage Temperature, TSTG
-65°C to 150°C
NOTE: Stresses beyond those listed under Absolute
Maximum Ratings may cause permanent damage to the
device. These ratings are stress specifications only. Functional
operation of product at these conditions or any conditions beyond those listed in the DC Characteristics or AC Characteristics is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect product reliability.
TABLE 3A. POWER SUPPLY DC CHARACTERISTICS, VDD = VDDA = VDDO_REF_OUT = VDDO_Q = 3.3V±5%, TA = 0°C TO 70°C
Symbol
Parameter
VDD
VDDA
Test Conditions
Minimum
Typical
Maximum
Units
Core Supply Voltage
3.135
3.3
3.465
V
Analog Supply Voltage
3.135
3.3
3.465
V
3.135
3.3
3.465
VDDO
Output Supply Voltage
IDD
Power Supply Current
70
mA
IDDA
Analog Supply Current
25
mA
IDDO
Output Supply Current
12
mA
V
TABLE 3B. LVCMOS/LVTTL DC CHARACTERISTICS, VDD = VDDA = VDDO_REF_OUT = VDDO_Q = 3.3V±5%, TA = 0°C TO 70°C
Symbol
Parameter
VIH
Input High Voltage
Test Conditions
VIL
Input Low Voltage
IIH
Input High Current
VDD = VIN = 3.465V
IIL
Input Low Current
VDD = 3.465V, VIN = 0V
VOH
Output High Voltage; NOTE 1
Minimum
Typical
Maximum
Units
2
VDD + 0.3
V
-0.3
0.8
V
5
µA
-150
µA
2.6
V
Output Low Voltage; NOTE 1
VOL
NOTE 1: Outputs terminated with 50Ω to VDDO_x/2 See Parameter Measurement Information Section,
"3.3V Output Load Test Circuit".
0.5
V
Maximum
Units
TABLE 4. CRYSTAL CHARACTERISTICS
Parameter
Test Conditions
Minimum
Mode of Oscillation
Typical
Fundamental
Frequency
40
Equivalent Series Resistance (ESR)
50
Shunt Capacitance
Drive Level
840001CK-32
MHz
10
www.icst.com/products/hiperclocks.html
3
Ω
7
pF
100
µW
REV. A NOVEMBER 23, 2005
PRELIMINARY
Integrated
Circuit
Systems, Inc.
ICS840001-32
FEMTOCLOCKS™ CRYSTAL-TOLVCMOS/LVTTL FREQUENCY SYNTHESIZER
TABLE 5. AC CHARACTERISTICS, VDD = VDDA = VDDO_REF_OUT = VDDO_Q = 3.3V±5%, TA = 0°C TO 70°C
Symbol Parameter
Test Conditions
REF_OUT
fOUT
Output Frequency
t jit(Ø)
RMS Phase Jitter (Random)
t R / tF
Q
Output Rise/Fall Time
Minimum
Maximum
Units
100
MHz
f_SEL = 1
100MHz, Integration Range:
637kHz to 5MHz
106.25MHz, Integration Range:
637kHz to 5MHz
20% to 80%
106.25
MHz
0.83
ps
0.78
ps
90 0
ps
50
%
odc
Output Duty Cycle
All parameters are characterized @ 100MHz and 106.25MHz.
840001CK-32
Typical
f_SEL = 0
www.icst.com/products/hiperclocks.html
4
REV. A NOVEMBER 23, 2005
PRELIMINARY
Integrated
Circuit
Systems, Inc.
ICS840001-32
FEMTOCLOCKS™ CRYSTAL-TOLVCMOS/LVTTL FREQUENCY SYNTHESIZER
TYPICAL PHASE NOISE
AT
106.25MHZ
0
Fibre Channel Filter
➤
-60
-70
106.25MHz
Raw Phase Noise Data
-80
-90
-100
RMS Phase Jitter (Random)
637kHz to 5MHz = 0.78ps (typical)
➤
NOISE POWER dBc
Hz
-10
-20
-30
-40
-50
-110
-120
-130
-140
-150
➤
-160
-170
-180
-190
-200
Phase Noise Result by adding
Fibre Channel Filter to raw data
10
100
1k
10k
100k
1M
OFFSET FREQUENCY (HZ)
840001CK-32
www.icst.com/products/hiperclocks.html
5
REV. A NOVEMBER 23, 2005
PRELIMINARY
Integrated
Circuit
Systems, Inc.
ICS840001-32
FEMTOCLOCKS™ CRYSTAL-TOLVCMOS/LVTTL FREQUENCY SYNTHESIZER
PARAMETER MEASUREMENT INFORMATION
1.65V ± 5%
Noise Power
Phase Noise Plot
SCOPE
VDD,
VDDA,
VDDO_X
Qx
LVCMOS
Phase Noise Mask
GND
Offset Frequency
f1
-1.65V ± 5%
f2
RMS Jitter = Area Under the Masked Phase Noise Plot
3.3V OUTPUT LOAD AC TEST CIRCUIT
RMS PHASE JITTER
V
DDOX
80%
2
Q
80%
t PW
t
odc =
Clock
Outputs
PERIOD
t PW
20%
20%
tR
tF
x 100%
t PERIOD
OUTPUT DUTY CYCLE/PULSE WIDTH/PERIOD
840001CK-32
OUTPUT RISE/FALL TIME
www.icst.com/products/hiperclocks.html
6
REV. A NOVEMBER 23, 2005
PRELIMINARY
Integrated
Circuit
Systems, Inc.
ICS840001-32
FEMTOCLOCKS™ CRYSTAL-TOLVCMOS/LVTTL FREQUENCY SYNTHESIZER
APPLICATION INFORMATION
POWER SUPPLY FILTERING TECHNIQUES
As in any high speed analog circuitry, the power supply pins are
vulnerable to random noise. The ICS840001-32 provides separate power supplies to isolate any high switching noise from
the outputs to the internal PLL. VDD, VDDA and VDDO_X should be
individually connected to the power supply plane through
vias, and bypass capacitors should be used for each pin. To
achieve optimum jitter performance, power supply isolation
is required. Figure 1 illustrates how a 10Ω resistor along with
a 10μF and a .01μF bypass capacitor should be connected to
each VDDA pin. The 10Ω resistor can also be replaced by a
ferrite bead.
3.3V
VDD
.01μF
10Ω
V DDA
.01μF
10μF
FIGURE 1. POWER SUPPLY FILTERING
CRYSTAL INPUT INTERFACE
parallel resonant crystal and were chosen to minimize the
ppm error. The optimum C1 and C2 values can be slightly
adjusted for different board layouts.
The ICS840001-32 has been characterized with 10pF parallel resonant crystals. The capacitor values, C1 and C2, shown
in Figure 2 below were determined using a 40MHz, 10pF
XTAL_IN
C1
X1
Crystal
XTAL_OUT
C2
Figure 2. CRYSTAL INPUt INTERFACE
840001CK-32
www.icst.com/products/hiperclocks.html
7
REV. A NOVEMBER 23, 2005
PRELIMINARY
Integrated
Circuit
Systems, Inc.
ICS840001-32
FEMTOCLOCKS™ CRYSTAL-TOLVCMOS/LVTTL FREQUENCY SYNTHESIZER
RELIABILITY INFORMATION
TABLE 7.
θJAVS. AIR FLOW TABLE FOR 16 LEAD VFQFN
θJA vs. 0 Air Flow (Linear Feet per Minute)
0
Multi-Layer PCB, JEDEC Standard Test Boards
51.5°C/W
TRANSISTOR COUNT
The transistor count for ICS840001-32 is: 2121
840001CK-32
www.icst.com/products/hiperclocks.html
8
REV. A NOVEMBER 23, 2005
PRELIMINARY
Integrated
Circuit
Systems, Inc.
PACKAGE OUTLINE - K SUFFIX
FOR
ICS840001-32
FEMTOCLOCKS™ CRYSTAL-TOLVCMOS/LVTTL FREQUENCY SYNTHESIZER
16 LEAD VFQFN
TABLE 8. PACKAGE DIMENSIONS
JEDEC VARIATION
ALL DIMENSIONS IN MILLIMETERS
SYMBOL
MINIMUM
MAXIMUM
16
N
A
0.80
1.0
A1
0
0.05
0.25 Reference
A3
b
0.18
0.30
e
0.50 BASIC
ND
4
NE
4
3.0
D
D2
0.25
1.25
3.0
E
E2
0.25
1.25
L
0.30
0.50
Reference Document: JEDEC Publication 95, MO-220
840001CK-32
www.icst.com/products/hiperclocks.html
9
REV. A NOVEMBER 23, 2005
PRELIMINARY
Integrated
Circuit
Systems, Inc.
ICS840001-32
FEMTOCLOCKS™ CRYSTAL-TOLVCMOS/LVTTL FREQUENCY SYNTHESIZER
TABLE 9. ORDERING INFORMATION
Part/Order Number
Marking
Package
Shipping Packaging
Temperature
ICS840001CK-32
1C32
16 Lead VFQFN
tray
0°C to 70°C
ICS840001CK-32T
1C32
16 Lead VFQFN
2500 tape & reel
0°C to 70°C
ICS840001CK-32LF
TB D
16 Lead "Lead-Free" VFQFN
tray
0°C to 70°C
ICS840001CK-32LFT
TBD
16 Lead "Lead-Free" VFQFN
2500 tape & reel
0°C to 70°C
NOTE: Par ts that are ordered with an "LF" suffix to the par t number are the Pb-Free configuration and are RoHS complaint.
The aforementioned trademarks, HiPerClockS and FemtoClocks are trademarks of Integrated Circuit Systems, Inc. or its subsidiaries in the United States and/or other countries.
While the information presented herein has been checked for both accuracy and reliability, Integrated Circuit Systems, Incorporated (ICS) assumes no responsibility for either its use
or for infringement of any patents or other rights of third parties, which would result from its use. No other circuits, patents, or licenses are implied. This product is intended for use
in normal commercial applications. Any other applications such as those requiring extended temperature range, high reliability or other extraordinary environmental requirements are
not recommended without additional processing by ICS. ICS reserves the right to change any circuitry or specifications without notice. ICS does not authorize or warrant any ICS
product for use in life support devices or critical medical instruments.
840001CK-32
www.icst.com/products/hiperclocks.html
10
REV. A NOVEMBER 23, 2005
Similar pages