STB4395

CT2 RECEIVER/TRANSMITTER

April 1996

ADVANCE DATA

TQFP64

(Plastic Package)

ORDER CODE : STB4395 or STB4395A

.

FULLY INTEGRATED DOUBLE SUPERHETE-

RODYNE RECEIVER

.

OPERATION FROM 800MHz TO 1000MHz

.

RECEIVER OUTPUT AS BITSTREAM

.

FULLY INTEGRATED TRANSMITTER

.

TRANSMITTER INPUT I/Q/REFIQ

OR

I/I, Q/Q

.

INTEGRATED POWER AMPLIFIER

.

CT2 PA SWITCH-ON PROFILE INTEGRATED

.

VCO’s INTEGRATED

.

SYNTHESIZERS INTEGRATED

.

CHANNEL SELECT LOGIC ON CHIP

.

INTEGRATED VOLTAGE REGULATION

.

SUPPLY VOLTAGES FROM 3.0V TO 5.5V

This is advance information on a new product now in development or undergoing evaluation. Details are subject to change without no tice.

DESCRIPTION

The STB4395(A) is a fully integrated receiver-

transmitter designed for CT2 applications, and in-

corporates all the VCO’s, synthesizers, PLLs, and

channel select logic, to make a fully functional

”single chip” radio.

The receiver is of the double superhet architecture

and operates from an aerial input (via a SAW filter)

to bitstream output to CT2 format, whilst the trans-

mitter operates from I/Q inputs to +13dBm at the

final frequency. A single (external) frequency ref-

erence is all that is required to give full coverage

over the range of 800 to 1000MHz.The on-off slope

of the Transmit PAis governed internally to give the

required switch-on ramp, whilst the output can be

swiched from low to high power by means of an

external digital control signal.

The channelselect is controlled from a digital serial

input, and allows continuous channel control from

800 to 1000MHz.

T h e S TB 4395 ex i s t s in

t wo v er si ons:

the STB4395, which has

I/I, Q/Q transmit data

input/outputs,

is designed to operate with the

SGS-THOMSON baseband companion part, the

ST5095. The STB4395A has a 3 wire I/Q interface

and is compatible with commercially available I/Q

transmit data baseband IC’s.

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