Micro Analog systems MAS6282
The MAS6282 is an integrated circuit well suited to build VCTCXO for mobile communication. 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.DESCRIPTION
Temperature calibration is achieved in three calibration temperatures only. 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
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● 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
APPLICATIONS
●● VCTCXO for mobile phones VCTCXO for other applications BLOCK DIAGRAM DA 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) POLYNOMIAL Thermal sensor VREF TEST MUX TIN MOUT CLK f(T) = Ax3+Bx+C OUT FILTER PV VC_SENS VC V divider VDD To all blocks CDACC CDACF XO core f | f/2 Buffer+ divider OUT VSS...