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High Performance Automotive Sonar Intrusion – Data Sheet
AS8412
March 2001
Page 14 of 14
The Application Circuit II of Fig. 8b can be used in a simpler system, that does not need micro-
controller. A 400-kHz oscillator is built with a ceramic resonator. By using just the ALARM out-
put, the system is able to detect intrusion, blockage and saturation as alarm of the operation
and of the IC self-test diagnostic. A courtesy time is provided by R3 and C7.
EMI Protection
The usual precautions against EMI, such as PCB with ground plane, short tracks and shielded
cables, are recommended for AS8412 applications, to avoid possible effects from noise in-
duced by external sources.
The RX cable must be shielded, because of the low-voltage signal. An alternative to protect
other pins directly connected to unshielded cables, is to clamp induced voltages with signal
diodes close to the pins (Fig.9)
If a single shielded cable is used for the transmitting sensor, the internal wire may be con-
tection diodes
IC
V D D
(a)
(b)
Fig. 9 - Diode Clamp Protection for
Unshielded Cables
(a) pins 1, 20
(b) pins 17, 18, 19
Copyright
2000, Austria Mikro Systeme International AG, Schlo Premsttten, 8141 Unterpremsttten, Austria.
All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by
any means, without the prior permission in writing by the copyright holder. To the best of its knowledge, Austria Mikro Systeme
International asserts that the information contained in this publication is accurate and correct.
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| AS8413 | HIGH PERFORMANCE AUTOMOTIVE SONAR INTRUSION |
| AS8846 | Programmable PWM DC Motor Driver / Controller |
| AS8F128K32 | 128K x 32 FLASH FLASH MEMORY ARRAY |
| AS9C25128M2036L-166PI | 2.5V 256/128K X 36 Synchronous Dual-port SRAM with 3.3V or 2.5V interface |
| AS9C25256M2036L-200BC | 2.5V 256/128K X 36 Synchronous Dual-port SRAM with 3.3V or 2.5V interface |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AS8413 | 制造商:AMSCO 制造商全稱:austriamicrosystems AG 功能描述:HIGH PERFORMANCE AUTOMOTIVE SONAR INTRUSION |
| AS8424-A | 制造商:Coilcraft Inc 功能描述:DSL transformer, for AD20MSP910/918, not RoHS |
| AS8425-A | 制造商:Coilcraft Inc 功能描述:DSL transformer, for Motorola MC145660, not RoHS |
| AS8426-A | 制造商:Coilcraft Inc 功能描述:DSL transformer, for Alcatel MTK-20140, not RoHS |
| AS8444 | 制造商:AMSCO 制造商全稱:austriamicrosystems AG 功能描述:Programmable PWM DC Motor Driver / Controller |
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