RPM7137-H9R Rohm Semiconductor, RPM7137-H9R Datasheet - Page 14

• Manufacturer Part Number: RPM7137-H9R
• Description: Infrared Receivers REMOTE CTRL 36.7KHZ
• Manufacturer: Rohm Semiconductor

Specifications of RPM7137-H9R

• Carrier Frequency: 36.7 KHz
• Transmission Distance: 15 m
• Viewing Angle: 45 deg, 35 deg
• High Level Pulse Width: 800 us
• Low Level Pulse Width: 800 us
• Minimum High Level Output Voltage: 4.5 V
• Output Current: 2 mA
• Operating Voltage: 4.5 V to 5.5 V
• Supply Current: 0.95 mA
• Maximum Operating Temperature: + 75 C
• Minimum Operating Temperature: - 10 C
• Package / Case: RSIP-A3
• Sensing Distance: 15m
• B.p.f. Center Frequency: 36.7kHz
• Voltage - Supply: 4.5 V ~ 5.5 V
• Current - Supply: 1.5mA
• Orientation: Top View
• Mounting Type: Through Hole
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

2) Work of Each Blocks
• Photodiode
• IV
• Amplifier
• BPF (Band Pass Filter)
-10.00
-2.00
-4.00
-6.00
-8.00
0.00
The photodiode receives an optical signal transmitted from the remote control unit and
converts the optical signal into a current signal. The mold resin of the Remote Control Receiver
Module has a function to shut off visible light, thus allowing only the optical signal to pass.
Figure 6 shows the spectral sensitivity characteristics of the mold resin and photodiode.
The optical signal received by the photodiode and converted into the current signal is further
converted into a voltage signal. An automatic gain control function is provided to suppress
excessively strong optical signal input so that the signal will be within the permissible range of
the circuits.
The IV block amplifies the voltage signal
converted from the current signal to optimum
amplitude for the later stages where the
signal is further processed. If the input is
excessively high, the amplitude will be
limited in the IV block.
-8
Fig. 7 BPF Characteristics of RPM7100-Hx/RPM7200-Hx
-7
-6
-5
-4
Remote Control Receiver Module and Data Communication/Block Diagram and Work of Remote Control Receiver Module
-3
-2
Frequency (kHz)
-1
fo +1
+2
+3
+4
+5
+6
+7
+8
12
The remote transmission signal is modulated
by the subcarrier. The BPF is incorporated in
order to extract only pure signal components
from the signal (including noise) received.
120
100
80
60
40
20
0
700
Fig. 6 Relative Spectral Sensitivity Characteristics of
750
RPM7100-Hx/RPM7200-Hx
800
Wavelength: λ (nm)
850
900
950
1000
1050
1100