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PDF MK3711DTR Data sheet ( Hoja de datos )
| Número de pieza | MK3711DTR | |
| Descripción | LOW COST 8 - 16 MHZ 3.3 VOLT VCXO | |
| Fabricantes | Integrated Circuit Systems | |
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MK3711
LOW COST 8 - 16 MHZ 3.3 VOLT VCXO
Description
The MK3711 series of devices include the original
MK3711S, MK3711A, and the new MK3711B and
MK3711D. The MK3711D and MK3711B are drop-in
replacements for the MK3711S and MK3711A devices.
Compared to these earlier devices the MK3711D and
MK3711B offer a wider operating frequency range and
improved power supply noise rejection.
The MK3711 series combines the functions of a VCXO
(Voltage Controlled Crystal Oscillator) and PLL (Phase
Locked Loop) frequency doubler onto a single chip.
Used in conjunction with an external pullable quartz
crystal, this monolithic integrated circuit replaces more
costly hybrid (canned) VCXO devices. The MK3711 is
designed primarily for data and clock recovery
applications within end products such as ADSL
modems, set-top box receivers, and telecom systems.
The MK3711D exhibits a moderate VCXO gain of
120ppm/V typical, when used with a high quality
external pullable quartz crystal. The MK3711B offers a
higher VCXO gain of 150ppm/V, similar to the earlier
MK3711A. The higher intrinsic VCXO gain of the
MK3711C may help compensate for the reduced
pullability of a low quality crystal used in some
applications. However, higher VCXO gain may also
increase clock output phase noise.
The frequency of the on-chip VCXO is adjusted by an
external control voltage input into pin VIN. Since VIN is
a high impedance input, it can be driven directly from
Block Diagram
an PWM RC integrator circuit. Frequency output
increases with VIN voltage input. The usable range of
VIN is 0 to 3V.
Features
• MK3711D and MK3711B are drop-in replacements
for the earlier MK3711S and MK3711A devices
• MK3711D and MK3711B offer 24-36 MHz output
frequency range (output frequency = 2x crystal
frequency) and improved power supply noise
rejection
• Uses an inexpensive 12 to 18 MHz external crystal
• Ideal for ADSL applications using 17.664 MHz
external pullable crystal to generate locked 35.328
MHz clock physical layer clock
• Ideal for set-top box applications using 13.5 MHz
external pullable crystal to generate lock 27 MHz
clock transport video clock
• On-chip VCXO with guaranteed pull range of ±115
ppm minimum (MK3711D)
• VCXO tuning voltage 0 to 3.3 V
• Packaged in 8 pin SOIC (150 mil wide)
MK3711D is Recommended for New Designs
V IN
8 -1 6 M H z
P u lla b le
C ry s ta l
X1
X2
V o lta g e
C o n tro lle d
C ry s ta l
O s c illa to r
VDD
8 -1 6 M H z
GND
MDS 3711 F
1
Revision 070301
Integrated Circuit Systems q 525 Race Street, San Jose, CA 95126 q tel (408) 295-9800 q www.icst.com
1 page  
MK3711
LOW COST 8 - 16 MHZ 3.3 VOLT VCXO
DC Electrical Characteristics
VDD=3.3V ±5% , Ambient temperature 0 to +70°C, unless stated otherwise
Parameter
Symbol Conditions
Min. Typ.
Operating Voltage
VDD
3.15
Output High Voltage
Output Low Voltage
Output High Voltage (CMOS
Level)
VOH
VOL
VOH
IOH = -12 mA
IOL = 12 mA
IOH = -4 mA
2.4
VDD-0.4
Operating Supply Current
IDD Output = 12 MHz,
no load
7
Short Circuit Current
VIN, VCXO Control Voltage
IOS
VIA
±50
0
Max.
3.45
0.4
Units
V
V
V
V
mA
mA
3.3 V
AC Electrical Characteristics
VDD = 3.3V ±5%, Ambient Temperature 0 to +70° C, unless stated otherwise
Parameter
Symbol
Conditions
Min. Typ. Max. Units
Output Frequency
MK3711D and
MK3711B
FO
8 16 MHz
MK3711A and
MK3711S
FO VCXO Crystal frequency =
12 MHz
12 MHz
Crystal Pullability
MK3711D and
MK3711B
FP 0V< VIN < 3.3V, Note 1
+ 115
ppm
MK3711A and
MK3711S
FP 0V< VIN < 3.3V, Note 1
+ 100
ppm
VCXO Gain
MK3711D
VIN = VDD/2 + 1V, Note 1
120 ppm/V
MK3711B
VIN = VDD/2 + 1V, Note 1
150 ppm/V
MK3711A
VIN = VDD/2 + 1V, Note 1
170 ppm/V
MK3711S
VIN = VDD/2 + 1V, Note 1
100 ppm/V
Output Rise Time
Output Fall Time
Output Clock Duty Cycle
Maximum Output Jitter,
short term
tOR 0.8 to 2.0V, CL=15pF
1.5 ns
tOF 2.0 to 0.8V, CL=15pF
1.5 ns
tD Measured at 1.4V, CL=15pF 40 50 60 %
tJ CL=15pF
100 ps
Note 1: External crystal device must conform with Pullable Crystal Specifications listed on page 3.
MDS 3711 F
5
Revision 070301
Integrated Circuit Systems q 525 Race Street, San Jose, CA 95126 q tel (408) 295-9800 q www.icst.com
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet MK3711DTR.PDF ] | |
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