DA9276.003
13 July, 2006
MAS9276
IC for 10.00 – 30.00 MHz VCTCXO
•
•
•
•
•
•
DESCRIPTION
MAS9276 is integrated circuit well suited to build
VCTCXO for mobile communications. Temperature
calibration is achieved at three calibration
temperatures only. The trimming is done through a
serial bus and the calibration information is stored
in an internal PROM. This means that no rework
for trimming is needed.
To build a VCTCXO only a crystal is required in
addition to MAS9276. The compensation method
is fully analog, working continuously without
generating any steps or other interference.
Very High Control Voltage
Sensitivity
True Sinewave Output
Electrically Trimmable
Very Low Phase Noise
Low Power
Low Cost
FEATURES
•
•
•
•
•
Very small size
Minimal current consumption
Wide operating temperature range
Phase noise <-120 dBc/Hz at 100 Hz offset
Programmable Vc sensitivity
APPLICATIONS
•
•
VCTCXO for mobile phones
VCTCXO for other telecommunications
systems
BLOCK DIAGRAM
DA
CLK
PV
VC
CUB
INF
SENS
LIN
4
4
f(T)
MAS9276
TE1
4
Σ
f(T)
8
T
Vref
TMux
TE2
CDAC1
8
VDD
OUT
VSS
X2
X1
1 (8)
MAS [ MICRO ANALOG SYSTEMS ]
