TSOP4838 Vishay / Small Signal & Opto Products (SSP), TSOP4838 Datasheet - Page 5

• Manufacturer Part Number: TSOP4838
• Description: DIODE, IR EMITTING, 38 KHZ, ANGLE OF HALF TRANSMISSION DISTANCE +/-45DEG/C
• Manufacturer: Vishay / Small Signal & Opto Products (SSP)

Specifications of TSOP4838

• Carrier Frequency: 38
• Current, Output: 5 mA
• Temperature, Operating: –25 to +85 °C
• Voltage, Output: 100 mV
• Voltage, Supply: 5.5 V
• Supply Voltage: 2.7- 5.5 V
• Lead Free Status / Rohs Status: RoHS Compliant part Electrostatic Device

SUITABLE DATA FORMAT
The TSOP48.. series is designed to suppress spurious
output pulses due to noise or disturbance signals. Data and
disturbance signals can be distinguished by the devices
according to carrier frequency, burst length and envelope
duty cycle. The data signal should be close to the band-pass
center frequency (e.g. 38 kHz) and fulfill the conditions in the
table below.
When a data signal is applied to the TSOP48.. in the
presence of a disturbance signal, the sensitivity of the
receiver is reduced to insure that no spurious pulses are
present at the output. Some examples of disturbance signals
which are suppressed are:
• DC light (e.g. from tungsten bulb or sunlight)
• Continuous signals at any frequency
• Modulated IR signals from common fluorescent lamps
Note
For data formats with short bursts please see the data sheet of TSOP41..
Document Number: 82090
Rev. 2.5, 29-Jan-09
Minimum burst length
After each burst of length
a minimum gap time is required of
For bursts greater than
a minimum gap time in the data stream is needed of
Maximum number of continuous short bursts/second
Recommended for NEC code
Recommended for RC5/RC6 code
Recommended for Sony code
Recommended for Thomson 56 kHz code
Recommended for Mitsubishi code (38 kHz, preburst 8 ms, 16 bit)
Recommended for Sharp code
Suppression of interference from fluorescent lamps
(example of noise pattern is shown in figure 14 or figure 15)
Remote Control Systems
IR Receiver Modules for
16921
16920
Most common disturbance signals are suppressed
Fig. 14 - IR Signal from Fluorescent Lamp
Fig. 15 - IR Signal from Fluorescent Lamp
0
0
Lamp with High Modulation
IR Signal from Fluorescent
IR Signal from Fluorescent
Lamp with Low Modulation
with High Modulation
10
with Low Modulation
> 4 x burst length
5
10 cycles/burst
10 to 70 cycles
Vishay Semiconductors
≥ 12 cycles
TSOP48..
70 cycles
800
yes
yes
yes
yes
yes
yes
Time (ms)
Time (ms)
10
10
New TSOP48..
15
15
www.vishay.com
20
20
5