Description

STRADA431

2/6

DB2856 Rev 4

1

Description

STRADA431 is a single-chip transceiver for automotive radar able of covering the frequency

band from 24 to 24.25 GHz in order to be compliant with ISM band applications.

STRADA431 can be operated by a single power supply at 3.3 V thanks to integrated LDOs.

The device consists of:



One differential RF transmitter



Three single-ended RF receivers

and it is full configurable via SPI.

The transmitter part is based on:



On-chip voltage-controlled oscillator (VCO) controlled by an external fine tuning voltage

(VTUNEF pin) and a coarse digital control driven via SPI;



Two stages of Power amplifier (PA) digitally-controlled;



Two output signals, proportional to VCO output frequency:

–

DIV_OUT pin with 2 possible frequency ranges: 1.5 MHz or 23 kHz dividing RF

signal by 2 14 or 2 20

–

HV _DIV_OUT with a frequency around 750 MHz dividing RF signal by 25.

The transmitter delivers a typical output power of 13 dBm to the antenna.

Each receiver chain consists of:



A high linearity down converter



A VGA with 16 steps of programmable gain and band-pass filter with possibility to

center the cut-off frequencies (High Pass filter = 60 kHz; Low Pass filter = 500 kHz or

1 MHz configurable via SPI).



IF analog output

STRADA431 includes monitoring functions for compliancy to ISO-26262 Road Vehicles

Functional Safety: junction temperature sensor, transmitted output power detector and

complete Rx chain via Test-Tone.

Test-Tone can be used also for band pass filter calibration.

Table 2. Main parameters

Symbol

Parameter

Note/Test

condition

Min

Typ

Max

Unit

Vcc

Supply voltage

3.3

V

ICCTot

Current

consumption

All blocks active at

max gain with 3

Receivers powered

270

mA

POUT

Output power

13

dBm