RPM7236-H9R Rohm Semiconductor, RPM7236-H9R Datasheet - Page 11

• Manufacturer Part Number: RPM7236-H9R
• Description: RECEIVER REMOTE CTRL 36.0KHZ TOP
• Manufacturer: Rohm Semiconductor

Specifications of RPM7236-H9R

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

1. Basic Knowledge of Remote Control
1) Remote Control Receiver Module
2) Remote Control Optical Signal
3) Reason for Use of Infrared Rays
Remote Control Receiver Module
The Remote Control Receiver Module is an optical communications module that uses infrared rays
for TV sets and audio equipment.
Conventional models were of cubic structure (1.5 × 1.5cm) incorporating a PCB mounted with a
PIN photodiode, receiver IC, and capacitors and covered with a shield casing. Since ROHM
released a one-package model, however, mold resin models of one-package structure have been
mainstream products.
ROHM provides the RPM7100-Hx Series
(operating at 5V) and the RPM7200-Hx Series
(operating at 3.0V). Both of them are of two-chip
structure incorporating a PIN photodiode and
receiver IC.
ROHM's Remote Control Receiver Module
prevents malfunctions caused by power line
noise by taking measures for a reduction in
power supply ripples, thus suiting a variety of
power supply environments flexibly.
The remote control uses an infrared optical signal.
Infrared rays are invisible and longer in wavelength than visible light.
Remote control models use a dominant wavelength around 950nm.
The remote control is overwhelmingly used indoors under light emitted from lighting apparatus,
which includes quantities of visible light components. In order to prevent such light from becoming
a noise source, the remote control uses infrared
rays, which is rarely included in the light emitted
from the lighting apparatus.
In other words, the remote control uses infrared
rays in order to improve the signal-to-noise ratio.
The RPM7100-Hx Series and RPM7200-Hx
Series eliminate optical noise by providing the
resin packages with a filter function that shuts
off visible light.
9
Fig. 1 Relative Effective Distance vs. Power Supply
120
100
80
60
40
20
0
1
100
80
60
40
20
Ripple Frequency of RPM7200-Hx
0
Fig. 2 Relative Sensitivity of
400
500 600 700 800 900 1000 1100
RPM7100-Hx/RPM7200-Hx
10
Wavelength: λ (nm)
Ripple Frequency (kHz)
100
RPM7200-Hx Series
Competitors'
5-V products
1000
10000