参数资料
型号: NCS36000DG
厂商: ON Semiconductor
文件页数: 4/8页
文件大小: 0K
描述: IC PIR DETECTOR CTLR 14SOIC
标准包装: 55
类型: 检测器控制器
输入类型: 数字
输出类型: 数字
接口: CMOS
电流 - 电源: 50µA
安装类型: 表面贴装
封装/外壳: 14-SOIC(0.154",3.90mm 宽)
供应商设备封装: 14-SOICN
包装: 托盘
NCS36000
http://onsemi.com
4
APPLICATIONS INFORMATION
Oscillator
The oscillator uses an external resistor and capacitor to set
the system clock frequency. Multiple clock frequencies can
be selected using different combinations of resistors and
capacitors. Figure 2 shows a simplifier block diagram for
the system oscillator.
+
+
OSC
13
Q
SET
CLR
S
R
14
VDD
Figure 2. Block Diagram of System Oscillator Circuit
LDO Regulator
The LDO regulator provides the reference voltage for the
sensor and all other analog blocks within the system. The
nominal voltage reference for the sensor is 2.7 V
±5%. An
external capacitor is needed on the VREF pin to guarantee
stability of the regulator.
Differential Amplifiers
The two differential amplifiers can be configured as a
bandpass filter to condition the PIR sensor signal for the post
digital signal processing. The cutoff frequencies and
passband gain are set by the external components. See
Figure 5.
10
1
10
0
10
1
20
30
40
50
60
70
80
Figure 3. Plot Showing Typical Magnitude Response
of Differential Amplifiers When Configured as a
Bandpass Filter
Window Comparator
The window comparator compares the voltage from the
second differential amplifier to two reference voltages from
the LDO regulator. COMP_P triggers if OP2_O is greater
than the Vh voltage and COMP_N triggers if OP2_O is
lower than the Vl voltage. See Figures 4 and 5.
Vh
Vl
Vdd
Vss
Comp_P
Vdd
Vss
Comp_N
OP2_O
Vm
Figure 4. Plot Showing Functionality of Window Comparator for an Analog Input OP2_O
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