DESCRIPTION

The SA8025A is a monolithic low power, high performance dual frequency synthesizer fabricated in QUBiC BiCMOS technology. The SA8025A is an improved version of the SA8025, suitable for narrow band systems like the Japan Personal Digital Cellular (PDC) system. The new design improves the performance of the fractional spur compensation circuitry. The new version is pin-for-pin compatible with the previous version.

FEATURES

• Operation up to 1.8GHz at 3V

• Fast locking by “Fractional-N” divider

• Auxiliary synthesizer

• Digital phase comparator with proportional and integral charge pump output

• High speed serial input

• Low power consumption

• Programmable charge pump currents

• Supply voltage range 2.7 to 5.5V

• Excellent input sensitivity: VRF_IN = –20dBm

APPLICATIONS

• PHS (Personal Handy-phone System)

• PDC (Personal Digital Cellular)

• PCS (Personal Communication Service)

• Portable communication systems