Datasheet > S1M8836

S1M8836

更新时间： 2024-01-22 18:52:35

品牌	Logo	应用领域
三星 - SAMSUNG		/
页数	文件大小	规格书
29页	236K
描述
FRACTIONAL-N RF/INTEGER-N IF DUAL PLL

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S1M8836 数据手册

FRACTIONAL-N RF/INTEGER-N IF DUAL PLL

S1M8836/37

INTRODUCTION

24-QFN-3.5´ 4.5

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 S - D fractional-N techniques solves the fractional spur problems in

other fractional-N synthesizers based on charge pump compensation. The

synthesizer also has an additional feature that the PCS/CDMA channel

frequency in steps of 10kHz can be accurately programmed.

The S1M8836/37 contains quadruple-modulus prescalers. The S1M8836 RF

synthesizer adopts an 8/9/12/13 prescaler(16/17/20/21 for the S1M8837) and the IF synthesizer adopts an 8/9

prescaler. Phase detector gain is user-programmable for maximum flexibility to address IS-95 CDMA and

IMT2000. Various program-controlled power down options as well as low supply voltage help the design of

wireless cell phones having minimum power consumption.

Using the Samsung's proprietary digital phase-locked-loop technique, the S1M8836/37 has a linear phase

detector characteristic and can be used for very stable, low noise PLL's. Supply voltage can range from 2.7V to

4.0V. The S1M8836/37 is available in a 24-QFN package.

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:

S1M8836

(RF) 8/9/12/13

(RF) 16/17/20/21

(IF) 8/9

Fractional-N

Integer-N

S1M8837

S1M8836/37

S1M8836: 250MHz to 1.0GHz(RF) / 45MHz to 520MHz(IF)

S1M8837: 500MHz to 2.5GHz(RF) / 45MHz to 520MHz(IF)

Excellent in-band phase noise ( – 85dBc/Hz @ PCS, – 90dBc/Hz @ CDMA)

Improved fractional spurious performance ( < 80dBc )

Frequency resolution (= 10kHz/64 @ f_ref= 9.84MHz)

Fast channel switching time: <500us

Programmable charge pump output current: from 50mA to 800mA in 50mA steps

Programmability via on-chip serial bus interface

12 3 4 5 6 7...29

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