S1M8837 - FRACTIONAL-N RF/INTEGER-N IF DUAL PLL
Pin No.
1 2 3 4 5 6 7 8 9 10 11 Symbol VDDRF VpRF CPoRF DGND finRF finRF GNDRF VDDRFa OSCin foLD RF_EN * * I O I I/O * * O * I I Descriptions RF PLL power supply (2.7V to 4.0V).
Must be equal to VDDIF.
Power supply for RF charge pump.
Must be ≥ VDDRF and VDDIF
FRACTIONAL-N RF/INTEGER-N IF DUAL PLL S1M8836/37 INTRODUCTION The S1M8836/37 is a Fractional-N frequency synthesizer with integrated prescalers, designed for RF operation up to 1.0GHz/2.5GHz and for IF operation up to 520MHz.
The fractional-N synthesizer allows fast-locking, low phase noise phase-locked loops to be built easily, thus having rapid channel switching and reducing standby time for extended battery life.
The S1M8836/37 based on Σ - ∆ fractional-N techniques solves the fractional sp
S1M8837 Features
* High operating frequency dual synthesizer Operating voltage range : 2.7 to 4.0V Low current consumption(S1M8836: 5.5mA, S1M8837: 7.5mA) Selectable power saving mode (Icc = 1uA typical @3V) Quadruple-modulus prescaler and Fractional-N/Integer-N: S1M
