AMN31112 Panasonic Electric Works, AMN31112 Datasheet - Page 11

• Manufacturer Part Number: AMN31112
• Description: SENSOR MOTION STD DETECT WHT LEN
• Manufacturer: Panasonic Electric Works
• Series: NaPiOn™r

Specifications of AMN31112

• Sensing Distance: 16.40' (5m)
• Sensor Type: Passive Motion
• Sensing Object: *
• Response Frequency: *
• Material - Body: *
• Shielding: *
• Voltage - Supply: 3 V ~ 6 V
• Output Type: Digital
• Terminal Type: PC Pin
• Package / Case: Radial
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 255-2644

The digital output enables connec-
tion directly to microcomputers.
MP motion sensor block diagram
Shielding is increased because the
amp circuit is built into the TO5
metal package.
Comparison table of noise with-
standing capability
MP Motion Sensor
Conventional type
FEATURE
FEATURE
2
3
Multi lens
radiation
Infrared
Optical filter
Circuit design is easy because the amp and comparator are built in
Noise withstanding capability
TO5 metal package
(9.8mm
9mm
Quad type
PIR element
.386inch
Single-chip
IC
Amplifier
circuit
Distance at which motion
sensor is not affected by
cellular phone noise
Min. 1 to 2cm .394 to .787
inch
Min. 1 to 2m 3.281 to
6.562ft
TO5 metal package
.354inch
Comparator
Stabilized
output
circuit
supply
power
dia.)
Vdd
Output
Gnd
Regular same-system sensors require separate noise countermeasures to be taken.
To achieve the same scheme as the ‘
MP Motion Sensor, a sensor element, amplifier
and comparator are required.
The output from the sensor element is extremely
weak in the passive infrared scheme, thus the signal
must be amplified and converted to an ON/OFF sig-
nal with a comparator circuit before output.
amp and comparator. Be sure to carefully check the func-
tions, etc., when comparing with other company's products.
To achieve the same scheme as the NaPiOn MP
Motion Sensor, a countermeasure for radiant noise
in general is necessary. If noise enters the circuit
between the sensor element and the amplifier, the
noise will be amplified along with the weak signal,
resulting in detection errors.
For this reason, shielding is necessary between
the sensor element and the amplifier.
Key point
Key point
Shielding is taken care of in the ‘
3. Features of MP Motion Sensor ‘
Signal
Signal
Lens
Lens
Signal
Lens
Shield
(Block diagram for a typical passive infrared sensor)
(TO5 metal package includes shielding)
Weak signal
is not just a sensor element; it has a built in
Weak signal
element
element
Sensor
Sensor
element
Sensor
Amplifier circuit
Amplifier circuit
Amplifier circuit
Strong signal
Strong signal
Noise
(except for analog output type).
Comparator
Comparator
Comparator
On
Off
Detection error
On
Off
circuit
circuit
circuit
Output
Output
Output
’
’
’