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Package: 3 pin Board Insertion Type
Changes temperature variation into analogue signal which it emits, when a heat source, such as a
person, comes into detection area.
The analogue signal is amplified by Operational Amplifier (IC802).
2 Circuits Built-in Operational Amplifier (IC802)
Operating Power Supply: +3.3V
Package: 8 pin SSOP
Amplifies analogue signal from Pyroelectric Infrared Sensor (IC801).
The amplified analogue signal goes into Comparator (IC803).
2 Circuits Built-in Comparator (IC803)
Operating Power Supply: +3.3V
Package: 8 pin SSOP
Composes Window Comparator Circuit. It generates digital signal (H L) to CPU, when the amplified
analogue signal from Operation Amplifier is over stipulated voltage. (Standard value is about 0.6~1.6V.)
Operation of Pyroelectric Infrared Sensor
1. Pyroelectric Infrared Sensor (IC801) emits analogue signal, when a heat
source, such as a person, moves into the detection area.
2. Above signal is amplified by Operation Amplifier (IC802) which emits
analogue signal.
3. Above signal is input to Comparator (IC803) and generates digital
signal (H L), when signal amplitude is over standard voltage.
4. Above digital signal is input to CPU (IC101).
13.1.7. PAN Control Block
A pan motor operates, when CPU (IC101) on a Main Board controls the Motor Driver IC (IC402) on the
same board.
A Constant Voltage Bipolar Drive System is employed. The Voltage of Motor Power (VM) is 3.3V. ø15
Stepping Motors are employed.
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