DA9278.004

11 November, 2010

1 (5)

MAS9278

IC for 10.00 – 30.00 MHz VCXO

•

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

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.

FEATURES

APPLICATIONS

•

Very small size

•

Minor current draw

•

Wide operating temperature range

•

Phase noise <-130 dBc/Hz at 1 kHz offset

•

Programmable Vc sensitivity

•

VCXO for mobile phones

•

VCXO for other telecommunications systems

•

Replacement for TCXO modules

BLOCK DIAGRAM

DA

CLK

PV

VSS

VC

VDD

X2

OUT

X1

XO1

Digital

MAS9278

5

2

2