RPM7237-R Rohm Semiconductor, RPM7237-R Datasheet - Page 19

• Manufacturer Part Number: RPM7237-R
• Description: RECEIVER REMOTE CTRL 36.7KHZ STR
• Manufacturer: Rohm Semiconductor

Specifications of RPM7237-R

• Sensing Distance: 15m
• B.p.f. Center Frequency: 36.7kHz
• Voltage - Supply: 2.7 V ~ 3.6 V
• Current - Supply: 500µA
• Orientation: Side View
• Mounting Type: Through Hole
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

1) Design of Beam Spread Angle
2) Environment-resistive Noise Design
6. Precautions for Designing Receiver Side
Remote Control Receiver Module
• Installation of Sensor Window and Remote Control Receiver Module
• Light Guide Tube
Environments where the Remote Control Receiver Module is used have quantities of noise
sources. The Remote Control Receiver Module has very high sensitivity to receive minute
optical signals. Therefore, the Remote Control Receiver Module takes a variety of
countermeasures against each noise source. If there is an interference of excessive noise,
however, the Remote Control Receiver Module may malfunction.
Remote Control
Receiver Module
Fig. 19 Light Guide Tube of RPM7100-Hx/RPM7200-Hx
Remote Control
Receiver Module
Fig. 18 Sensor Window of RPM7100-Hx/RPM7200-Hx
φ2
Design the window at the angle
connecting the lens edge and window edge.
φ1
17
If the specified beam spread angle is θ1, design the
sensor window to satisfy the following condition, as
shown in the figure on the right-hand side: θ>θ1.
If the angle is specified from the lens top, there
will be no optical signal incidence at the edge of
the lens. Therefore, the Remote Control Receiver
Module will not fully demonstrate its performance.
Apply the condition below, on the condition
that the diameter of light guide tube on the
Remote Control Receiver Module is φ1 and
that of the lens of the Remote Control
Receiver is φ2.
The maximum sensitivity is obtained by
beaming the optical signal at the whole
surface of the lens.
φ1>φ2