PMB2347 データシートの表示（PDF） - Infineon Technologies

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PMB2347

RF/IF Double PLL Frequency Synthesizer

Infineon Technologies 

PMB 2347

preliminary

Product Description

2.1 Overview

The PMB 2347 is a RF/IF double PLL frequency synthesizer implemented in

Infineon’ high speed BiCMOS technology B6HFC. The device contains two

PLLs with integrated prescalers especially designed for use in battery powered

radio equipment and mobile telephones. Primary applications are single- and

dual-band digital cellular systems e.g. GSM, PCN (DCS 1800) and PCS sys-

tems.

2.2 Features

s Operation range 2.7 to 5.0 V

s Low operating current consumption

s Programmable power down modes

s High input sensitivity and high input frequencies:

PLL1 (RF): 2.8 GHz

PLL2 (IF): 500 MHz

s Programmable dual modulus prescaler divide ratio:

PLL1: 1:64/65 or 1:32/33

PLL2: 16/17 or 1:8/9

Dividing ratios:

A counters: PLL1: 0 to 63

PLL2: 0 to 15

N counters: PLL1: 3 to 16,383 PLL2: 3 to 16,383

R counters 3 to 16,383 for PLL1 and PLL2

s Fast phase detectors and charge pump outputs without dead zone

s High phase noise performance

s Switchable polarity and programmable phase detector currents

s External reference current setting for PD outputs

s Fast serial 3-wire bus interface with low threshold voltage Schmitt-Trigger

inputs for interfacing with low voltage baseband circuits

s Two data registers in PLL2 for fast IF band switching

s A programmable multi-functional output port for lock detect (quasidigital lock

detect) and test mode

Wireless Components

2-2

Specification, August 1999

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