This is preliminary information on a
new product under development.
Micro Analog Systems Oy reserves
the right to make any changes
without notice.
DA1174.001
6 February, 2001
MAS1174
IC FOR 10.00 – 30.00 MHz VCXO
• Low Power
• Wide Supply Voltage Range
• True Sine Wave Output
• Very High Level of Integration
• Electrically Trimmable
• Very Low Phase Noise
• Low Cost
DESCRIPTION
The MAS1174 is an integrated circuit well suited to
build VCXO for mobile communication. The trimming
is done by a serial bus and the calibration
information is stored in an internal PROM.To build a
VCXO only two additional components, a varactor
FEATURES
• Very small size
• Minor current draw
• Wide operating temperature range
• Phase noise <-130 dBc/Hz at 1 kHz offset
and a crystal are needed. The compensation
method is fully analog. IC compensation work is
continuous without generating any steps or other
interferences.
APPLICATIONS
• VCXO to mobile phones
• VCXO to other telecommunications systems
BLOCK DIAGRAM
VC
DA
CLK
PV
2
Digital
VDD
5
C1
2
VSS
MAS1174
OUT
X1
X2
XO1
D1
1 (5)