Preliminary Data

This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to

change without notice.

July 2007

Rev 1

1/29

1

STA5620

Fully integrated RF front-end for GPS

Features

Description

The chip is a fully integrated RF front-end able to

down-convert the GPS L1 signal from

1575.42MHz to 4.092MHz.

The IF signal is converted by a two bit ADC. Sign

(SIGN), Magnitude (MAG) and the 16.368MHz

sampling clock (GPS_CLK) are provided to the

baseband.

The magnitude data is internally integrated in

order to control the variable gain amplifiers in

accordance to the RF input signal strength.

An excellent quality of reception in critical

environments is ensured by the good noise figure

and linearity of the receiver.

The on-chip oscillator supports crystal

frequencies in the range of 10MHz to 40MHz. It is

able to support TCXO providing also a buffered

copy of the oscillator frequency.

The chip, using STMicroelectronics BiCMOS

SiGe technology, is housed in a QFN-32 package.

Table 1.

Device summary

Order code

Marking

Package

Packing

STA5620TR

STA5620

VFQFPN-32L

Tape & reel

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