IR Receiver Modules for Remote Control Systems

Description

The DS1838 is remote control receiver modules.Pin diode and receiver IC are assembled on one module.Small-sized, light-weight, and low current consumption.modules have been achieved by using resin mold.The demodulated output signal can directly be decodedby a microprocessor. The main benefit is the reliablefunction even in disturbed ambient and the protectionagainst uncontrolled output pulses.

Features

Supply Voltage Range: 2.7V to 5.5 VTTL and CMOS compatibilityPhoto detector and preamplifier in one package.Internal filter for PCM frequencyOutput active lowEnhanced Immunity against all kinds of disturbance lightNo occurrence of disturbance pulses at output pin with in nominal conditions.Short settling time after power On.Meet RoHS

Applications

Audio video applicationsHome appliancesToy applicationsRemote control equipment

Application Circuit

Dimensions

R-C filter recommended to suppress power supR-C filter should be connected closely between

VCC

GND

VOUT

47

47

IC

DS1838

Block Diagram

OUTInput BPF

AGCControl

Wave-form

Detector&

ATC

AGC

GND

PostAmp.

VCC

40

Waveform

Rectifier

PINDiode

Transmitter

IR LED:L5IR5

TAT Elec-tech Co.,Ltd

ply disturbances. VCC pin and GND pin.

VCC

GND

~100Ω

MCU

1/4

Max. Unit

Conditions

5.5 V

60 kHz

80

DS1838

Electro-optical Characteristics

2/4

Specifications hold over the Recommended Operating Conditions, unless otherwise noted herein. All values are at 25 and Vcc=3.0V/5.0V

Recommended Operating Conditions

Parameter Symbol Min. Typ. Max. Unit Conditions

Operating Voltage Vcc V

Input Frequency fin kHz

Operating Temperature Top

(Ta = 25 )

2.7 - 5.5

30 38 60

-20 25 80

Absolute Maximum Ratings (Ta = 25 )

Parameter Symbol Min. Max. Unit Conditions

Supply Voltage Vcc 0 6.0 V

Output Voltage Vout 0 6.0 V

Output Current Iout 0 2.5 mA

Storage Temperature Tst -25 85

Soldering Temperature Tsd 260 ±5 Max 5 sec

Parameter Symbol Conditions Min. Typ. Max. Unit

Supply Voltage Vcc -- 2.7 -- 5.5 V

Working Temperature Topr -- -20 25 80

Current Consumption Icc Input Singnal=0 -- 0.8 1.5 mA

Max Input Current Iin Vin=0V 0.3 -- 0.8 mA

Half Angle θ -- -- ±45 -- deg

B.P.F. Center Frequency Fo -- -- 37.9 -- kHz

Vcc=3V 8 12 -- m Reception Distance d 200±5Lux

Vcc=5V 10 12 -- m

Peak Wavelength λp -- -- 940 -- nm

Singnal Output So -- --Active Low--

High Level Output Voltage Voh -- 4.5 5.0 -- V

Low Level Output Voltage Vol -- -- 0.2 0.4 V

High Level Pulse Width Twh 500 600 700 μs

Low Level Pulse Width Twl Burst Wave=600μs

500 600 700 μs

DS1838

TAT Elec-tech Co.,Ltd

[ Fig. 1 ] Data Signal diagram

VCC

GND

PDS/Transmitter 10

10

VOUT

10

30

[ Fig.2 ] Transmitter

: Indicates horizontal andvertical directions

Vout

GND

Vcc

osc

Transmitter

[ Measurement condition for arrival distance ]

Ambient light source : Detecting surface illumination shall be irradiate 200±50Luxunder ordinary white fluorescence lamp without high frequency lighting

[ Fig.3 ] Test condition of arrival distance

(Integrator output)

Burst length

Carrier Frequency : 37.9kHz

(Output pulse)

(Input burst waveform)

The minimumBurst length

3/4

DS1838

TAT Elec-tech Co.,Ltd

Electrical/Optical Characteristics

[ Fig.5 ] Sensitivity vs. Supply Voltage[ Fig.4 ] Supply Current vs. Voltage

[ Fig.6 ] Output Pulse Width vs. Distance

BPF fc

0

0.2

0.4

0.6

0.8

1

1.2

0.5 0.6 0.7 0.8 0.9 1 1.1 1.2 1.3 1.4 1.5

f/fo Relative Frequency

Rela

tive resp

onsi

vity

[ Fig.8 ] BPF Fc Curve

>±2000VMin ±2000VC=100, R=1.5

Human Body Model

>±800VMin ±800VR=100, 1ΩCharged Device Model

>±200VMin ±200VC=200, R=0Ω

Machine Model

ResultsSpecificationConditionsParameter

ESD Test Results

0.0

0.5

1.0

1.5

2.0

2.5

2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5

Supply Voltage(V)

Supply

Curr

ent(

)

0

20

40

60

80

100

2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5Supply Voltage(V)

Relat

ive S

ensit

ivity(

%)

300

400

500

600

700

800

0 4 8 12 16 20 24 28

Transmission Distance(m)

Outp

ut

Puls

e W

idth

()

[ Fig.7 ] Directivity (Horizontal)

100

9080˚

0˚ 20˚

40˚

60˚

060 2080 40

Rela

tive

Radia

nt(

˚)

Relative Sensitivity(%)

V

H

4/4

DS1838

TAT Elec-tech Co.,Ltd