MAS9279 Datasheet, PDF (1/10 Pages) Micro Analog systems – IC FOR 10.00 - 52.00 MHz VCTCXO

DA9279.003
13 July 2006
MAS9279
IC FOR 10.00 – 52.00 MHz VCTCXO
DESCRIPTION
The MAS9279 is an integrated circuit well suited to
build high end VCTCXO for telecommunication.
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
• Minimal current consumption
• Wide operating temperature range
• Very low phase noise
• Programmable VC-sensitivity
• Minimum operating temperature –40 °C
•
Oscillator frequency output f₀/2 version
available
BLOCK DIAGRAM
• Fourth Order Compensation
• Frequency Stability +/- 0.3
ppm
• Wide Frequency Range
• Very Low Phase Noise
• Low Voltage
• Minimum Operating
Temperature –40 °C
• Tri State CMOS Output
To build a VCTCXO only crystal is required in
addition to MAS9279. The compensation method is
fully analog, working continuously without
generating any steps or other interference.
APPLICATIONS
• VCTCXO for high end telecommunications
systems
• TCXO for high end telecommunication
systems
DA
CLK
PV
Fourth
Term
CUB ⁴
f(T)
INF ⁵
Σ
3
SENS
8
f(T)
LIN
VC
VDD
CDAC1 ⁶
4
CDAC2
VSS
X2
TE1
T
Vref TMux TE2
OUT
X1
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