Maxim DS4077L-0C0 77.76mhz vcxo Datasheet

Rev 0; 8/05
77.76MHz VCXO
The DS4077 is an integrated voltage-controlled crystal
oscillator (VCXO) module designed to provide reference
clock generation in base stations, telecom/datacom, and
wireless applications. The DS4077 is developed using a
fundamental quartz crystal plus a unique integrated circuit design. The internal fundamental quartz crystal
determines the frequency of operation. Custom frequencies are available. Contact the factory for availability.
The DS4077 is designed for use with applications requiring low phase noise and jitter. Jitter performance of better than 1ps RMS is achieved over the 12kHz to 80MHz
range. Phase noise performance of better than
-130dBc/Hz at 1kHz is achieved with this design.
Features
♦ 77.76MHz (fNOM) Frequency
♦ 3.135V to 3.465V Operation
♦ Low Jitter: <1ps RMS
♦ ±69ppm Absolute Pull Range (APR)
♦ LVCMOS Output Buffer
♦ Minimum ±110ppm Tuning Range (+25°C)
♦ Available in Commercial or Industrial
Temperature Ranges
♦ 14mm x 9mm x 3.06mm Plastic LGA Package
Applications
Ordering Information
Clock-Data Recovery in Telecom/Datacom
Applications
PART
TEMP RANGE
DS4077L-0C0
PINPACKAGE
TOP MARK*
0°C to +70°C
9 LGA
DS4077L-0C0
Data Retiming
DS4077L-0CN -40°C to +85°C
9 LGA
DS4077L-0CN
Reference Clock Generation in Base Stations
and Wireless Applications
*The top mark includes an “N” for industrial temperature grade
devices.
Pin Configuration
Block Diagram
VDD
TOP VIEW
N.C.
N.C.
N.C.
9
8
7
X1
CRYSTAL
VC 1
6
VDD
N.C. 2
5
N.C.
4
LVCMOS
LVCMOS
OUTPUT
OSC
X2
DS4077
VSS 3
VC
CONTROL
VARACTOR
DS4077
LGA
(TRANSFER-MOLDED PLASTIC PACKAGE)
______________________________________________ Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
1
DS4077
General Description
DS4077
77.76MHz VCXO
ABSOLUTE MAXIMUM RATINGS
VC, VDD, LVCMOS Output .......................................-0.3V, +3.6V
Operating Temperature Range
(noncondensing) ..............................................-40°C to +85°C
Junction Temperature ......................................................+150°C
Thermal Resistance
Junction to Ambient .................................................91.06°C/W
Junction to Case ......................................................44.51°C/W
Storage Temperature Range .............................-55°C to +125°C
Soldering Temperature
(reflow, 2 passes max)....See IPC/JEDEC STD-020 Specification
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(VDD = 3.135V to 3.465V, TA = -40°C to +85°C or 0°C to +70°C, unless otherwise noted.) (Typical values at +25°C, VDD = 3.3V,
unless otherwise noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
VDD Operating Supply Range
VDD
VDD Supply Current
IDD
Output open
Frequency
fOUT
VC = 1.6V, VDD = 3.3V, TA = +25°C,
LOAD = 10pF
Frequency vs. VDD Sensitivity
VDDppm
VDD = 3.3V ±5%
Frequency vs. Load Sensitivity
LOADpmm
10pF to 20pF (Note 2)
Frequency vs. Temperature
TEMPppm
From +25°C
VC Voltage Range
VCRANGE
MIN
TYP
MAX
3.135
3.3
3.465
V
20
30
mA
fNOM
fNOM
+8ppm
MHz
+11.5
ppm
fNOM
–8ppm
-3.5
-1
-20
0.3
1.60
UNITS
ppm
+20
ppm
2.8
V
164
ppm/V
ppm
Frequency Tuning Sensitivity
VCSEN
(Note 3)
41
Tuning Voltage Bandwidth
VCBW
(Note 2)
10
Absolute Pull Range
fTUNE
VC = 0.3V to 2.8V, LOAD = 10pF
-69
+69
VC = 0V to VDD
-500
+500
nA
-5
+5
ppm
-10
+10
ppm
VC Input Leakage
Aging, First Year
Aging, Years 0–10
2
ILCV
AGEppm
tAGE
Total aging
_____________________________________________________________________
kHz
77.76MHz VCXO
(VDD = 3.135V to 3.465V, TA = -40°C to +85°C or 0°C to +70°C, unless otherwise noted.) (Typical values at +25°C, VDD = 3.3V,
unless otherwise noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
LVCMOS OUTPUT
Output Logic 0
Output Logic 1
VOL
VOH
Output Current -450µA
0
0.4
V
Output Current +450µA
VDD 0.8V
VDD
V
Output Rise Time
tR
Load condition: 10pF to ground; 10% to
90% VDD (Note 2)
2
ns
Output Fall Time
tF
Load condition: 10pF to ground; 90% to
10% VDD (Note 2)
2
ns
Duty Cycle
DCYC
Harmonics
H
Load condition: 10pF, VDD / 2 (Note 2)
40
VDD = 3.3V, TA = +25°C (Note 2)
-18
60
%
-8
dBc/Hz
SSB PHASE NOISE AND JITTER, VDD = 3.3, TA = +25°C (Note 2)
10Hz Offset
-74
100Hz Offset
-105
LVCMOS
1kHz Offset
-130
10kHz Offset
-147
100kHz Offset
-150
Jitter (12kHz to 80MHz)
1
dBc/Hz
psRMS
Note 1: Limits at -40°C are guaranteed by design and not production tested.
Note 2: Guaranteed by design and not production tested.
Note 3: Tuning linearity typically better than ±10%.
Pin Description
PIN
NAME
FUNCTION
1
VC
2, 5, 7, 8, 9
N.C.
VCXO Control Voltage
No Connection
3
VSS
Ground
4
LVCMOS
6
VDD
LVCMOS Output
DC Power
_____________________________________________________________________
3
DS4077
ELECTRICAL CHARACTERISTICS (continued)
Typical Operating Characteristics
(VCC = +3.3V, TA = +25°C, unless otherwise noted.)
OUTPUT FREQUENCY
vs. LOAD CAPACITANCE vs. VC
FREQUENCY vs. TEMPERATURE
fOUT = 77.76MHz
125
100
fOUT DEVIATION (ppm)
6
150
DS4077 toc02
fOUT = 77.76MHz
8
DS4077 toc01
10
fOUT DEVIATION (ppm)
4
2
0
-2
-4
50
CL = 20pF
25
0
-25
-50
-6
-75
-100
-10
CL = 0pF
75
-8
-125
-40
-20
0
20
40
TEMPERATURE (°C)
60
80
0.3
0.8
1.3
1.8
2.3
2.8
VC (V)
20
fOUT = 77.76MHz
TA = +25°C
15
DS4077 toc03
OUTPUT FREQUENCY
vs. SUPPLY VOLTAGE vs. VC
fOUT DEVIATION FROM VDD = 3.3V (ppm)
DS4077
77.76MHz VCXO
10
VC = 0.3V
5
0
-5
VC = 1.6V
-10
VC = 2.8V
-15
-20
3.135 3.190
3.245 3.300 3.355
VDD (V)
3.410
3.465
Package Information
(For the latest package information, go to www.maxim-ic.com/DallasPackInfo and click on package drawing 56-G6034-001.)
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
4 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2005 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products, Inc.
is a registered trademark of Dallas Semiconductor Corporation.
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