MAS9270

www.DataSheet4U.com DA9270.008 11 September 2006 MAS9270 IC FOR 10.00 – 30.00 MHz VCTCXO 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. To build a VCTCXO additionally only crystal is required. The compensation method is fully analog, working continuously without generating any steps or other interference. 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 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 APPLICATIONS VCTCXO for mobile phones VCTCXO for other telecommunications systems BLOCK DIAGRAM 4 4 DA CLK PV VC CUB INF SENS LIN f(T) MAS9270 TE1 4 Σ f(T) 8 T Vref TMux TE2 CDAC1 8 VDD CDAC2 2 OUT X2 X1 VSS 1 (9) DA9270.008 11 September 2006 PIN DESCRIPTION Pin Description Power Supply Voltage Programming Input Serial Bus Clock Input Serial Bus Data Input Temperature Output Test Multiplexer Output Voltage Control Input Crystal Oscillator Output Crystal/Varactor Oscillator Input ...