INTEGRATED CIRCUITS
SA7026 1.3GHz low voltage fractional-N dual frequency synthesizer
Product specification Supersedes ...
INTEGRATED CIRCUITS
SA7026 1.3GHz low
voltage fractional-N dual frequency synthesizer
Product specification Supersedes data of 1999 Apr 16 1999 Nov 04
Philips Semiconductors
Philips Semiconductors
Product specification
1.3GHz low
voltage fractional-N dual synthesizer
SA7026
GENERAL DESCRIPTION
The SA7026 BI
CMOS device integrates programmable dividers, charge pumps and a phase comparator to implement a phase-locked loop. The device is designed to operate from 3 NiCd cells, in pocket phones, with low current and nominal 3 V supplies. The synthesizer operates at VCO input frequencies up to 1.3 GHz. The synthesizer has fully programmable main, auxiliary and reference dividers. All divider ratios are supplied via a 3-wire serial programming bus. Separate power and ground pins are provided to the analog and digital circuits. The ground leads should be externally short-circuited to prevent large currents flowing across the die and thus causing damage. VDDCP must be greater than or equal to VDD. The charge pump current (gain) is set by an external resistance at RSET pin. Passive loop filters could be used; the charge pump operates within a wide
voltage compliance range to provide a wider tuning range.
LOCK TEST VDD GND RFin+ RFin– GNDCP PHP PHI 1 2 3 4 5 6 7 8 9 20 PON 19 STROBE 18 DATA 17 CLOCK 16 REFin+ 15 REFin– 14 RSET 13 VDDCP 12 AUXin 11 PHA
GNDCP 10
SR01649
Figure 1. Pin Configuration
FEATURES
APPLICATIONS
Low phase noise Low power Fully programmable main an...