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componentes Descripción

Fabricante

UMA1005

Dual low-power frequency synthesizer

Philips Electronics 

Philips Semiconductors

Dual low-power frequency synthesizer

Preliminary specification

UMA1005T

FEATURES

• Fast locking by ‘Fractional-N’ divider

• Auxiliary synthesizer

• Digital phase comparator with proportional and integral

charge pump output

• High-speed serial input

• Low-power consumption

• Programmable charge pump currents

• Supply voltage range 2.9 to 5.5 V.

APPLICATIONS

• Mobile telephony

• Portable battery-powered radio equipment.

GENERAL DESCRIPTION

The UMA1005T is a low-power, high-performance dual

frequency synthesizer fabricated in CMOS technology.

Fractional-N division with selectable modulo 5 or 8 is

implemented in the main synthesizer.

The detectors and charge pumps are designated to

achieve 10 to 5000 kHz channel spacing using

fractional-N decreases the channel spacing by a factor

5 or 8. Together with an external standard 2, 3 or 4 ratio

prescaler the main synthesizer can operate in the GHz

frequency range.

Channel selection and programming is realized by a

high-speed 3-wire serial interface.

ORDERING INFORMATION

TYPE NUMBER

UMA1005T

NAME

SSOP20

PACKAGE

DESCRIPTION

plastic shrink small outline package; 20 leads; body width 4.4 mm

VERSION

SOT266-1

November 1994

2

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