DA9276.003

13 July, 2006

1 (8)

MAS9276

IC for 10.00 – 30.00 MHz VCTCXO

•

Very High Control Voltage

Sensitivity

•

True Sinewave Output

•

Electrically Trimmable

•

Very Low Phase Noise

•

Low Power

•

Low Cost

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.

FEATURES

APPLICATIONS

•

Very small size

•

Minimal current consumption

•

Wide operating temperature range

•

Phase noise <-120 dBc/Hz at 100 Hz offset

•

Programmable Vc sensitivity

•

VCTCXO for mobile phones

•

VCTCXO for other telecommunications

systems

BLOCK DIAGRAM

T

Vref

TMux

Σ

DA

CLK

PV

VSS

VC

VDD

4

4

f(T)

f(T)

4

8

CUB

INF

SENS

LIN

8

CDAC1

TE1

TE2

X2

OUT

X1

MAS9276