DESCRIPTION

The MAS9280 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 additionally only a crystal is required. The compensation method is fully analog, working continuously without generating any steps or other interference. Divider function allows the usage of double frequency crystal.

FEATURES

• Very small size

• Minimum Vdd 2.4V

• No voltage reference capacitor needed

• Phase noise <-110 dBc/Hz at 100 Hz and <-130 dBc/Hz at 1kHz @ 32 MHz crystal

• Programmable VC-sensitivity

• Oscillator frequency output fo /2 versions available

APPLICATIONS

• VCTCXO for mobile phones

• VCTCXO for other telecommunications systems