Telefunken TSOP2856, TSOP2840, TSOP2838, TSOP2836, TSOP2830 Datasheet

TSOP28..

Vishay Telefunken

1 (7)Rev. 7, 31-Jan-00

www.vishay.de • FaxBack [phone]

Document Number 82058

Photo Modules for PCM Remote Control Systems

Available types for different carrier frequencies

Type fo Type fo
TSOP2830 30 kHz TSOP2833 33 kHz
TSOP2836 36 kHz TSOP2837 36.7 kHz
TSOP2838 38 kHz TSOP2840 40 kHz
TSOP2856 56 kHz

Description

The TSOP28.. – series are miniaturized receivers for
infrared remote control systems. PIN diode and pre­amplifier are assembled on lead frame, the epoxy
package is designed as IR filter.
The demodulated output signal can directly be de­coded by a microprocessor. The main benefit is the
reliable function even in disturbed ambient and the
protection against uncontrolled output pulses.

14 500

Features

D

Photo detector and preamplifier in one package

D

Internal filter for PCM frequency

D

TTL and CMOS compatibility

D

Output active low

D

Improved shielding against electrical field distur­bance

D

Suitable burst length ≥6 cycles/burst

Special Features

D

Small size package

D

Enhanced immunity against all kinds of distur­bance light

D

No occurrence of disturbance pulses at the out­put

D

Short settling time after power on (<200ms)

Block Diagram

14318

PIN

Input

AGC

Control

Circuit

Band
Pass

Demodu-

lator

30 k

W

3

2

1

V

S

OUT

GND

TSOP28..

Vishay Telefunken

Rev. 7, 31-Jan-00

www.vishay.de • FaxBack [phone]

Document Number 82058

2 (7)

Absolute Maximum Ratings

T

amb

= 25_C

Parameter Test Conditions Symbol Value Unit

Supply Voltage (Pin 2) V

S

–0.3...6.0 V

Supply Current (Pin 2) I

S

5 mA

Output Voltage (Pin 1) V

O

–0.3...6.0 V

Output Current (Pin 1) I

O

5 mA

Junction Temperature T

j

100

°

C

Storage Temperature Range T

stg

–25...+85

°

C

Operating Temperature Range T

amb

–25...+85

°

C

Power Consumption (T

amb

x 85 °C) P

tot

50 mW

Soldering Temperature t x 10 s, 1 mm from case T

sd

260

°

C

Basic Characteristics

T

amb

= 25_C

Parameter Test Conditions Symbol Min Typ Max Unit

Supply Current (Pin 2) VS = 5 V, Ev = 0 I

SD

0.9 1.2 1.5 mA

y()

VS = 5 V, Ev = 40 klx, sunlight I

SH

1.3 mA

Supply Voltage (Pin 2) V

S

4.5 5.5 V

Transmission Distance Ev = 0, test signal see fig.6,

IR diode TSAL6200, I

F

= 300 mA

d 35 m

Output Voltage Low (Pin 1) IOL = 0.5 mA,Ee = 0.7 mW/m2,

f = f

o

V

OL

250 mV

Irradiance (30 – 40 kHz) Pulse width tolerance:

E

e min

0.3 0.5 mW/m

2

Irradiance (56 kHz)

t

pi

–

4/f

o

<

t

po

<

t

pi

+

6/f

o

,

test signal see fig.6

E

e min

0.4 0.7 mW/m

2

Irradiance E

e max

30 W/m

2

Directivity Angle of half transmission distance ϕ

1/2

±45 deg

Application Circuit

14319

TSAL62..

TSOP28..

2

1

3

4.7 mF *)

m

C

>10 k

W

optional

100 W *)

+5V

*) recommended to suppress power supply disturbances

GND

TSOP28..

Vishay Telefunken

3 (7)Rev. 7, 31-Jan-00

www.vishay.de • FaxBack [phone]

Document Number 82058

Suitable Data Format

The circuit of the TSOP28... is designed in that way
that unexpected output pulses due to noise or
disturbance signals are avoided. A bandpassfilter, an
integrator stage and an automatic gain control are
used to suppress such disturbances.
The distinguishing mark between data signal ( not
suppressed) and disturbance signal (supressed) are
carrier frequency, burst length and Signal Gap Time
(see diagram below).

The data signal should fullfill the following condition:

• Carrier frequency should be close to center
frequency of the bandpass (e.g. 38kHz).

• Burst length should be 6 cycles/burst or longer.

• After each burst a gap time of at least 10 cycles is

neccessary.

• The data format should not make a continuous
signal transmission. There must be a Signal Gap Time
(longer than 15ms) at least each 90ms (see Figure A).

Some examples for suitable data format are:
NEC Code (repetitive pulse), NEC Code (repetitive
data), Toshiba Micom Format, Sharp Code, RC5
Code, RECS–80 Code, R–2000 Code.

When a disturbance signal is applied to the TSOP28...
it can still receive the data signal. However the
sensitivity is reduced to that level that no unexpected
pulses will occure.

Some examples for such disturbance signals which
are suppressed by the TSOP28... are:

• DC light (e.g. from tungsten bulb or sunlight),

• Continuous signal at 38kHz or at any other

frequency,

• Signals from fluorescent lamps (see Figure B).

• Continuous IR signal (e.g. 1ms burst, 2ms pause)

0 102030405060708090100

time [ms]

Signal Gap Time

Figure A: Data Signal (Output of IR Receiver) with a Signal Gap Time of 20ms

0 2 4 6 8101214161820

time [ms]

Signal Gap Time

Figure B: Disturbance Signal from Fluorescent Lamp with Signal Gap Time of 7ms (suppressed by TSOP28..)