MAS9270CTB2 データシートの表示（PDF） - Micro Analog Systems Oy
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MAS9270CTB2 Datasheet PDF : 8 Pages
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DA9270.004
4 April, 2002
MAS9270
IC FOR 10.00 – 30.00 MHz VCTCXO
• Wide Supply Voltage Range
• True Sine Wave Output
• Very High Level of Integration
• Electrically Trimmable
• Very Low Phase Noise
• Low Cost
• Minimum Operating Temperature –40 °C
DESCRIPTION
The MAS9270 is an integrated circuit well suited to
build VCTCXO for mobile communication.
Temperature calibration is achieved in three
calibration temperatures only. The trimming is done
through a serial bus and the calibration information
is stored in an internal PROM. This means no
rework for trimming is needed.
FEATURES
• Very small size
• Minor current draw
• Wide operating temperature range
• Phase noise <-120 dBc/Hz at 100Hz offset
• Programmable VC-sensitivity
• Minimum Operating Temperature –40 °C for
MAS9270Cxx3
BLOCK DIAGRAM
To build a VCTCXO additionally only crystal is
required. The compensation method is fully analog,
working continuously without generating any steps
or other interference.
APPLICATIONS
• VCTCXO for mobile phones
• VCTCXO for other telecommunications
systems
DA
CLK
PV
4
CUB
INF 4
SENS 4
f(T)
Σ
f(T)
LIN 8
VC
CDAC1 8
VDD
2
CDAC2
VSS
X2
MAS9270
TE1
T
Vref TMux TE2
OUT
X1
1 (8)
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