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參數(shù)資料
| 型號： | AS8413 |
| 廠商： | AUSTRIAMICROSYSTEMS AG |
| 元件分類： | 消費家電 |
| 英文描述： | HIGH PERFORMANCE AUTOMOTIVE SONAR INTRUSION |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, PDIP24 |
| 封裝： | DIP-24 |
| 文件頁數(shù)： | 2/15頁 |
| 文件大?。?/td> | 125K |
| 代理商： | AS8413 |
High Performance Automotive Sonar Intrusion – Data Sheet
AS8413
March 2001
Page 2 of 15
PRE-
BAND-PASS
FILTER
AGC
ENVELOPE
DETECTOR
A / D
CONVERTER
D S P
DISCRIMINATOR
MODULATOR /
DRIVER
CONTROL
OSCILLATOR
SIGNALLING
VCAP
SAS
SENS 1
SENS 0
ALEN
LED
WARN
ALARM
SEL40K
OSCIN
OSCOUT
TX1
TX2
RX
COSC
SYNC
Key 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
General 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 it 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.
Block Diagram
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