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參數(shù)資料
| 型號(hào)： | AS8413 |
| 廠商： | AUSTRIAMICROSYSTEMS AG |
| 元件分類： | 消費(fèi)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(yè)數(shù)： | 13/15頁(yè) |
| 文件大?。?/td> | 125K |
| 代理商： | AS8413 |
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)第11頁(yè)第12頁(yè)當(dāng)前第13頁(yè)第14頁(yè)第15頁(yè)
High Performance Automotive Sonar Intrusion – Data Sheet
AS8413
March 2001
Page 13 of 15
The blockage and saturation are signalized just one time at each occurrence, to avoid continu-
ous alarm triggering. Detection of glass breakage by saturation is not guaranteed.
Table 3. Disturbances detected by the AS8413
LED
pulsing
pulsing
0
pulsing
0
ALARM
1
1
0
0
0
WARN
1
0
0
1
1
Conditions
no disturbance
weak intrusion
intrusion
blockage
saturation
WARN
ALARM
t
al
t
al
t
al
t
ONW
t
ONN
Fig. 7 - Weak Intrusion Followed by an Intrusion
Courtesy Entry/Exit Time
The pin ALEN is an optional alarm enable input that can be used to provide a courtesy entry
and/or exit time. When tied to VDD, normal alarm operation is enabled. If ALEN is grounded, the
outputs ALARM, WARN and LED are disabled, except during the self-test, when LED indicates
the test result.
By grounding ALEN, the IC can be made inoperative as seen by the control unit and still keep its
internal processing. This is useful when intrusion detections must be temporarily inhibited, or to
block self-test pulses at ALARM and WARN.
During the first 10 or 20 seconds after shutting a door in a hot and sunny day, an alarm indica-
tion may occur, due to thermal gradients inside the vehicle. That sould be considered when
choosing a courtesy time for a AS8413-based system. When a RC circuit connected to the
supply voltage is applied to ALEN, the courtesy time after power-up is given by:
T
≈
0.92 x R x C
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