DA9278.004
13 July 2006
MAS9278
IC for 10.00 – 30.00 MHz VCXO
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DESCRIPTION
The MAS9278 is an integrated circuit well suited to
build VCXO for mobile communication. The crystal
offset trimming is done through a serial bus and
the calibration information is stored in an internal
PROM.
To build a VCXO only one additional component, a
crystal, is needed.
Low Power
Wide Supply Voltage Range
True Sine Wave Output
Very High Level of Integration
Integrated Varactor
Electrically Trimmable
Very Low Phase Noise
Low Cost
FEATURES
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Very small size
Minor current draw
Wide operating temperature range
Phase noise <-130 dBc/Hz at 1 kHz offset
Programmable Vc sensitivity
APPLICATIONS
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VCXO for mobile phones
VCXO for other telecommunications systems
Replacement for TCXO modules
BLOCK DIAGRAM
VC
2
OUT
MAS9278
DA
CLK
PV
VDD
Digital
5
2
VSS
X1
XO1
X2
1 (5)
MAS [ MICRO ANALOG SYSTEMS ]
