SA7025

INTEGRATED CIRCUITS SA7025 Low-voltage 1GHz fractional-N synthesizer Product specification IC17 Data Handbook 1996 Aug 6 Philips Semiconductors Philips Semiconductors Product specification 1GHz low-voltage Fractional-N synthesizer SA7025 DESCRIPTION The SA7025 is a monolithic low power, high performance dual frequency synthesizer fabricated in QUBiC BiCMOS technology. Featuring Fractional-N division with selectable modulo 5 or 8 implemented in the Main synthesizer to allow the phase detector comparison frequency to be five or eight times the channel spacing. This feature reduces the overall division ratio yielding a lower noise floor and faster channel switching. The phase detectors and charge pumps are designed to achieve phase detector comparison frequencies up to 5MHz. A triple modulus prescaler (divide by 64/65/72) is integrated on chip with a maximum input frequency of 1.04GHz. Programming and channel selection are realized by a high speed 3-wire serial interface. PIN CONFIGURATION DK Package CLOCK DATA STROBE VSS RFIN RFIN VCCP REFIN RA AUXIN VDD TEST LOCK RF RN VDDA PHP PHI VSSA PHA 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 FEATURES Operation up to 1.04GHz Fast locking by “Fractional-N” divider Auxiliary synthesizer Digital phase comparator with proportional and integral charge pump output SR00600 High speed serial input Low power consumption Programmable charge pump currents Supply voltage range 2.7 to 5.5V Excellent input sens...