MAS9276

www.DataSheet4U.com DA9276.003 13 July, 2006 MAS9276 IC for 10.00 – 30.00 MHz VCTCXO 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. Very High Control Voltage Sensitivity True Sinewave Output Electrically Trimmable Very Low Phase Noise Low Power Low Cost FEATURES Very small size Minimal current consumption Wide operating temperature range Phase noise <-120 dBc/Hz at 100 Hz offset Programmable Vc sensitivity APPLICATIONS VCTCXO for mobile phones VCTCXO for other telecommunications systems BLOCK DIAGRAM DA CLK PV VC CUB INF SENS LIN 4 4 f(T) MAS9276 TE1 4 Σ f(T) 8 T Vref TMux TE2 CDAC1 8 VDD OUT VSS X2 X1 1 (8) DA9276.003 13 July, 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 Power Supply Ground Buffer Output Symbol VDD PV CLK DA TE1 TE2 VC X1 X2 VSS OUT x-coordinate 166 420 979...