MAS9270 查看數據表（PDF） - Micro Analog Systems Oy

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MAS9270

IC FOR 10.00 – 30.00 MHz VCTCXO

Micro Analog Systems Oy 

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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