SP8858IGHPAS

SP8858 1·5GHz Professional Synthesiser Supersedes March 1997 version, DS3843 - 3.0 DS3843 - 4.1 July 1998 LOCK DETECT FEATURES s Low Residual Phase Noise (see Reference 1) s Operation to 1·5GHz over Full Temperature Range s High Input Sensitivity s Improved Linear Digital Phase Detector s Programmable Charge Pump Current: 10µA to 2 mA s On-chip 416/17 or 48/9 Dual Modulus Prescaler s Three-wire Serial Data Interface s 13-bit Reference Counter s 15-bit M Counter s Stores an Alternative Programming Word s Facility to Program A counter Only s Power Saving Standby Mode ABSOLUTE MAXIMUM RATINGS Supply voltage Storage temperature Operating temperature Prescaler input voltage 20·3V to 17V 265°C to 1150°C 255°C to 1125°C 2·5V p-p 4 3 2 1 28 27 26 25 24 23 FREF* POWER DOWN VEE4 VCC4 VCC1 RF INPUT RF INPUT 5 6 7 8 9 10 11 12 13 14 15 16 17 18 CP REF FPD* VEE3 The SP8858 is a single chip synthesiser intended for PLL signal synthesis applications up to 1.5GHz and includes a dual modulus prescaler (4N/N11), programmable A, M and R dividers, digital phase detector, charge pump and lock detect circuits. The SP8858 is a development of the SP8853 synthesiser with low residual phase noise, increased dynamic range above 1GHz and an improved high gain phase detector design that eliminates the dead-band. The low prescaler modulus, programmable to either 16/17 or 8/9, together with the 15-bit M counter and 13-bit reference counter make this device ideal for a diverse range of high pe...