AMN42121 Panasonic Electric Works, AMN42121 Datasheet - Page 63

• Manufacturer Part Number: AMN42121
• Description: SENSOR MOTION DETECT DIG BLK
• Manufacturer: Panasonic Electric Works
• Series: NaPiOn™r

Specifications of AMN42121

• Sensing Distance: 6.56' (2m)
• Sensor Type: Passive Motion
• Sensing Object: *
• Response Frequency: *
• Material - Body: *
• Shielding: *
• Voltage - Supply: 2.2 V ~ 3 V
• Output Type: Digital
• Terminal Type: PC Pin
• Package / Case: Radial
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 255-1809

30
31
A
comparator output
A
Right here!
Q
Q
(Open collector)
Amplifier output
Element output
Human body
<Timing chart> Standard type
What is a comparator?
When does current consumption standby
occur?
The amount of infrared radiation emitted from the human body is very
small, and the signal cannot be processed by the circuit as is. For this rea-
son, the signal is amplified by the amplifier circuit. The amplified signal must
then be compared to the reference level. If the amplified circuit is greater
than the reference level, a person is considered to have entered the detec-
tion area and a signal is output. The circuit that makes this comparison
is called a comparator.
When the time required for stabilization has elapsed and the sensor is
ready for detection, two states are possible depending the condition of the
detection area:
Number 2 above is the standby state. (Number 1 is the detection state.)
The difference between the standby state and the detection state is that the
output circuit is off in the standby state, and therefore current consumption
is less than in the detection state.
1. A person has entered the detection area (detection output ON)
2. Nobody is in the detection area (detection output OFF)
MP Motion Sensor ‘
Standby
Reference voltage
Reference voltage
’Questions and Answers Terminology
Detection
Amplifier
circuit
I’m a comparator.
See here as well!
See here as well!
Comparison
circuit
OK!
Output