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IRMS6118 डेटा पत्रक PDF( Datasheet डाउनलोड )


डेटा पत्रक - (IRMS6118 / IRMT6118) Infrared Data Transceiver - Infineon Technologies

भाग संख्या IRMS6118
समारोह (IRMS6118 / IRMT6118) Infrared Data Transceiver
मैन्युफैक्चरर्स Infineon Technologies 
लोगो Infineon Technologies लोगो 
पूर्व दर्शन
1 Page
		
<?=IRMS6118?> डेटा पत्रक पीडीएफ

IRMS6118 pdf
Figure 1. Block Diagram
Differential
Photodiode
Pre
amp
Ambient DC
Cancelling
AGC
www.DataSheet4U.com
TxD Tx In
Pin 3
GND
Pin 8
500 k
Main
amp
Lowpass
Filter
+
-
AGC & Signal
Reference
Processor
Tx
Blanking
Receive
Detector
+
-
Detector
Reference
Receive Ouput
Blanking
Tx Input
Buffer
Switched
current source
VCC
Tri-State
CMOS Buffer
VCC
VCC VCC
500 k
Pin 6
RxD
Receiver Output
Pin 4
Tri-State
Control
Regulated
Voltage &
Current
Sources
Power Down
SD
Pin 5
Transmit
IR LED
LED Anode
Pin 1
LED Cathode
Pin 2
Error
amp
Current Limited
Driver
Theory of operation
The IRMS6118/IRMT6118 SlimlineInfrared Data Transceiver
consists of a detector photodiode, an IR LED transmitter, an IC
containing ambient light suppressor, and Automatic Gain control
circuitry (AGC).
The ambient light suppressor can cancel up to 10 mW/cm2 (typi-
cal) at 5.0 V of DC ambient signal. This will typically allow opera-
tion in all but direct sunlight.
The AGC in the IC is to keep the system output constant by
varying the gain to accommodate a wide range of input signals.
It also provides noise immunity in the high noise ambient envi-
ronment.
For normal operation of the transmit and receiver modes, the
Shut Down (SD) pin should be held low. It is recommended
that this pin be connected to GND if Shut Down (SD) mode is
not used.
In receive mode, the receiver output (RxD) which normally
stays high, will go low for duration of the receive pulses. It is a
push-pull CMOS driver capable of driving a standard CMOS or
TTL load. No external pull-up or pull-down resistor is required.
In transmit mode, by asserting the TxD pin above 12 VCC will
turn on IR LED transmitter. At the LED Anode (pin 1) connect
this pin to VCC or unregulated power supply (not to exceed
VCC + 4.0 V), through a resistor to set the proper LED current to
reduce the thermal dissipation and to lower LED current.
Table 2. Slimline IRMS6118/IRMT6118 Truth Table
Inputs
Outputs
VCC SD TxD
Detector
2.4 V to High X=dont care X=dont care
5.0 V
state
state
RxD
500 k
pull-up
LED
Off
2.4 V to Low High
5.0 V
Low
<0.4 µW/cm2
<4.0 µW/cm2
Undefined On
High
Off
Low
2001 Infineon Technologies Corp. • Optoelectronics Division • San Jose, CA
www.infineon.com/opto • 1-888-Infineon (1-888-463-4636)
4–49
IRMS6118/IRMT6118
March 21, 2001-19

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