AS8413

Features:

True sonar/pulse-echo operation
Master/slave synchronization 
Wide dynamic range 
Programmable sensitivity levels 
Self-adaptive to vehicle interiors 
Self-adaptive to temperature and environmental changes 
High sensitivity to intrusion 
Immunity to false alarms 
Detection of sabotage attempts 
Compatible with standard 40 kHz ultrasonic transducers 
Specific for systems with multiple transducers 
No adjustments needed at factory or at field
Few external components 
Time reference: external clock or oscillator based on crystal/ceramic resonator 
Built-in self-test 
Internal power-on-reset 
Advanced CMOS technology 
Low power consumption: 0.65 to 1.0 mA 
Operation between -40°C and +85 °C 
Available in 24-pin DIP and 24-pin SOIC package

Pinout




Specifications

Supply Voltage	< 7V
Input Pin Voltage	-0,3 V to VDD + 0.3 V
Output Pin Voltage	-0,3 V to VDD + 0.3 V
Power dissipation	500 mW
Operating temperature under bias	-40 °C to +85 °C
Storage Temperature	-65 °C to +150 °C
Latch-up immunity	-10mA . + 10mA

Description

The AS8413 is a signal processing IC designed to implement reliable, high-performance sonar intrusion detectors. It generates short 40 kHz bursts to feed an ultrasonic trans-ducer. The resulting sonar waves are reflected on the vehicle interior and the echoes are received by another transducer. Inside the AS8413, the electrical signal is first submitted to an analog conditioning circuit, then AS8413 is digitized and processed by a DSP, whose output is analyzed by a discriminator based on fuzzy-logic techniques. Thus, true intrusion condi-tions can be discerned from natural phenomena and other allowable disturbances.
 
Synchronization between the sonar waves from 2 or more pairs of transducers is made possible by means of a master/slave configuration. Each pair is controlled by a AS8413 IC.
 
No adjustments are necessary at factory or at the field, as the AS8413 is self-adaptive to the physical and environmental conditions. Compact and EMI-resistant intrusion detectors
are made possible, due to the small number of components.