DA6282.001

9 January 2007

1 (5)

MAS6282

IC FOR 6.50 – 40.00 MHz VCTCXO

• Min. Supply Voltage 2.6 V

• Max. Frequency 40 MHz

• True Sine Wave Output

• Frequency Stability ±2.0 ppm

• Suitable for Ultra Small

VCTCXO

• Very Low Phase Noise

DESCRIPTION

The MAS6282 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.

To build a VCTCXO only a crystal is required in

addition to MAS6282. The compensation method is

fully

analog,

working

continuously

without

generating any steps or other interference.

Output is true sine wave resulting in lower

harmonics than with clipped sine wave output.

FEATURES

APPLICATIONS

•

Very small size

•

Minimum Vdd 2.6V

•

No voltage reference capacitor needed

•

Programmable VC-sensitivity

•

Divider option selectable by a PROM bit

•

Output peak voltage (amplitude) option

selectable by a PROM bit

•

VCTCXO for mobile phones

•

VCTCXO for other applications

BLOCK DIAGRAM

OUT

FILTER

VC_SENS

V divider

TFRPROM

TEST(2:0)

INF(4:0)

LIN(7:0)

CUB(3:0)

SCALE(4:0)

SENS(2:0)

CDACF(5:0)

CDACC(3:0)

DIV(0:0)

AMPL(0:0)

PV

CLK

VDD

XOUT

XIN

VSS

DA

VC

TEST

MUX

To all blocks

POLYNOMIAL

TIN

MOUT

OUT

CDACC

CDACF

VREF

Thermal

sensor

XO

core

Buffer+

divider

This is preliminary information on a new

product under development. Micro Analog

Systems Oy reserves the right to make any

changes without notice.