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參數資料
| 型號： | HT761X |
| 廠商： | Holtek Semiconductor Inc. |
| 英文描述： | General Purpose PIR Controller |
| 中文描述： | 通用紅外控制器 |
| 文件頁數： | 9/12頁 |
| 文件大小： | 688K |
| 代理商： | HT761X |
Mask options
The HT761X offers mask options to select the
output flash (3 times) when changing the oper-
ating mode. The chip will flash 3 times at a 1Hz
rate each time it changes from AUTO to another
mode and flash 3 times at a 2Hz rate when it
returns to the AUTO mode. However the chip
will not flash if the mode is changed by switch-
ing the MODE switch.
4, 6, or 8 hour options to return to AUTO from
override ON. The default is 8 hours.
Options for effective override: Once or twice
OFF/ON operation of power switch within 3
seconds. The default is OFF/ON twice.
Options for output flash to indicate effective
override operation. The default is to flash.
Options for effective PIR trigger pulse width:
>24mS, >32mS or >48mS. The default is 24ms.
Options for setting comparator window to be
1
1
16 (VDD–VE E ).
11.3 or 1
9 (VDD–VE E ). The default is
PIR amplifier
Consult the diagram below for details on the
PIR front end amplifier.
In Fig.5 there are 2 op-amps with different
applications. OP1 can be used independently as
a first stage inverting or non-inverting ampli-
fier for the PIR.
As the output of OP2 is directly connected to the
input of the comparator, it is used as a second
stage amplifying device. The non-inverting in-
put of OP2 is connected to the comparator’s
window centerpoint and can be used to check
this voltage and to provide a bias voltage that is
equal to the centerpoint voltage of the compara-
tor. In Fig.5 the comparator can have 3 window
levels set by mask option. 1. 16 (VDD–VE E ), 2.
11.3 (VDD–VE E ), 3. 1
dow level fails to be specified the default win-
dow is set to 1
16 (VDD–VE E ). The preset voltage
of VDD–VE E is 4V. The default values of V
CP
and V
CN
are therefore 0.25V,
(
9 (VDD–VEE). If the win-
4
)
.
Fig. 5 PIR amplifier
HT761X
9
24th Mar ’97
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相關代理商/技術參數 |
參數描述 |
|---|---|
| HT761X_09 | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:General Purpose PIR Controller |
| HT7620A(16DIP) | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Motion/Proximity Detector |
| HT7620A(16SOIC) | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Motion/Proximity Detector |
| HT7620B(16DIP) | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Motion/Proximity Detector |
| HT7620B(16SOIC) | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Motion/Proximity Detector |
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