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Semiconductor
SL2055
PREAMPLIFIER FOR REMOTE CONTROL USE
Description
* The SL 2055 is bipolar IC for receiving preamplifier of infrared remote control system. It consists of a head amplifier, a limiter, a band pass filter, a signal waveform detector, and a waveform rectifier, etc.
Features
* Built-in filter enable to vary center frequency by an external resistance (fo=30KHz to 80KHz, 38KHz typ.) * Possible to direct connection to a photo diode. * Open collector output(directly connectable to TTL and CMOS) * Internal pull-up resistance and power filter resistance(low-capacitance) * Less chances of malfunction associated with a high frequency lighting floure internal trap circuit
Ordering Information
Type NO. SL2055 Marking SL2055 Package Code SOP-8
Outline Dimensions
unit : mm
KSI-W025-001
1
SL2055
Maximum Ratings (Ta = 25C)
Characteristics
Supply Voltage Input Voltage Operating Temperature Storage Temperature Allowable Power Dissipation
Symbol
Vcc VIN Tope Tstg Pd
Rating
17 5 -20 ~ 75 -55 ~ 150 270
Unit
V Vp-p C C mW
Block Diagram
4 fo V CC2 3 RS 1 V CC1
RL IN+ 8 HEA D A MP LI MI T ER BP F + TRAP DET ECT O R W A V EF O R M S HA P ER O UT 2
A BLC
I N7 5
G ND 6
Cd
PIN Description
Pin. No
1 2 3 4 5 6 7 8
Symbol Pin Voltage
Vcc1 Out Vcc2 fo GND Cd ININ+ 1.4 1.5 2.5 2.5 5.0 5.0 The Power Supply Voltage
Description
Active Low Output Terminal and an Open Collector Output The Power Output Voltage Setting the Center Frequency of the Built-in BPF Ground The Detection Capacitor for the most Output Pulse Width Variation and Noise Reduction Setting the Frequency Characteristics and Gain of the Head Amplifier The input Signal Internal Impedance : 75K (typ.)
KSI-W025-001
2
SL2055
Electrical Characteristics(VCC=5V, Ta=25 C)
Item
Input Pin Vol1 Input Pin Vol2 Output Voltage (Low Level)
Symbol
Vin1 Vin2
Test Condition Input Signal
ON-SW
1 Iin=300A 1,4,6
Test Pin
8 8
Rating Min.
2.0 0.6
Unit Remark Max.
3.1 1.7 V V
Typ.
2.5 0.9
VOL
VP6=1V
3,5
2
-
0.2
0.4
V
Consumption Current
ICC
1,5
1
1.0
1.9
2.8
mA
Input Impedance
Zin
fin=38KHz,CW, Vin=0.2VPP
1,4,8
8
45
75
125
K
Note1
Voltage Gain
Av
fin=38KHz Vin=30Vpp
2,4,7,8
6
68
-
82
dB
BPF Bandwidth
fBW
-3dB Bandwidth Vin=30VPP
2,4,7,8
6
1.0
-
2.0
KHz
Detecting Ability(1)
TPW1
fin=38KHz Vin=60VPP, Burst Wave
1,4,7,8
2
440
540
770
Sec
Note2
Detecting Ability(1)
TPW2
fin=38KHz Vin=50mVPP, Burst Wave
1,4,7,8
2
440
660
770
Sec
Note2
Note) 1.Zin =75/[(Vi/Vx)-1] Vi : Input Level, Vx : Measured Value 2.Input a Burst Wave Signal of 1.2mSec Cycle, 38kHz
KSI-W025-001
3
SL2055
Test Circuit
R4 130K 4 3 O UT V CC 5V 2 1
+ C3
47F
SL2055 SL 2055
5 6 7 R7 100 SW6 C7 1800p F V P6 IN 300A R8 75K C8 470 R9 50 SW8 S I G NA L G ENER A T O R SW4 SW7 8 SW5 C9 470n F
SW1
SW2
SW3
C6 0.01F
R6 290K
Application Circuit
C7 1800p F P HO TO D IO D E R0 R7 0 ~ 1K C6 0 .0 1 F
8
7
6
5
S L 2055 SL2055
1
2
3 R4 130K C3 47F
4
+ +
P O W ER S UP P LY O UT
KSI-W025-001
4
SL2055
Terminal Functions
IN + (input pin) Connect a photodiode with pin structure between the pin8 and GND. An ABLC (Automatic Bias Level Control)circuit is built into the input section to prevent the input level from being saturated by the external disturbing lights, such that this circuit is actuated by a strong external disturbing light to fix the bias level of the input terminal. IN - (head amplifier gain setting pin) Connect a resistor and a capacitor in series between the pin7 and GND for setting the frequency characteristics and gain of the head amplifier. Increasing the value of a resistor or decreasing the value of a capacitor, the gain becomes small. When the capacitance is large the sensitivity is lowered against the transient response. Cd (detector capacitor connector pin) Connect the capacitor to detect between the pin6 to GND. When capacitance is large detected value is to the average, when it is small detected value is closer to the peak and output pulse width became, so that the most proper output pulse width variation and noise reduction characteristics can be obtained. GND Fo (ground pin) (BPF central or frequency setting pin) Connect a resistor between the pin3 (VCC2) and the pin4 When the resistance is large, the central frequency of the built-in BPF is lowered. VCC2 (power output pin) As the power is output to pin3 through the internal power filter resistance, connect An electrolytic capacitor to pin3 OUT (output pin) Open collector output width pull-up resistance. Its capability to drive a CMOS or TTL makes for easy connection with a receiving microcomputer. The SL2055 has an active low output. VCC1 (power supply pin) Supply voltage of 5V10% is applied to this terminal KSI-W025-001 5
SL2055
I/O Waveforms Description
I/O Pin
40u V p -p t o 2.5 V p -p
Waveform
Operation
Converts the Signal Current Voltage and amplifies it.
s tan dard 38 KHz
of
Photodiode
Input (Pin8)
600u S S t a n d a r d
Suppresses the Noise Component with BPF
BPF Output (Pin6)
5V
Integrates the Signal Component and make it as Rectangular Wave Output from Comparator.
Output (Pin2)
0.2V Standard
KSI-W025-001
6
SL2055
Typical Characteristics
S u p p l y Cu r r e n t V S . S u p p l y V o l t a g e F r e q u e n c y V S . R e s i s t a n c e (R 4) V c c = 5V 5 90 80 fc - Frequency - KHz 4 4.5 5 5.5 6 6.5 3 70 60 50 40 30 20 40 60 80 100 120 140 160 180 200 R 4 = R e s i s t a n c e -K
Ics - Supply Current - mA
4
2
1 0 3.5
V c c - S u pply V oltage - V
V olt a ge G a in V S . In pu t Fre qu e n c y 100 90 80 Av - Voltage Gain - dB 70 60 50 40 30 20 10 0 30 35 40 45 50 I i n - i n p u t F r e q u e n c y - KHz V c c = 5V R 2 = 130K V i = 30u V p -p
KSI-W025-001
7
SL2055
These AUK products are intended for usage in general electronic equipments(Office and communication equipment, measuring equipment, domestic electrification, etc.). Please make sure that you consult with us before you use these AUK products in equipments which require high quality and/or reliability, and in equipments which could have major impact to the welfare of human life(atomic energy control, airplane, spaceship, traffic signal, combustion central, all types of safety device, etc.). AUK cannot accept liability to any damage which may occur in case these AUK products were used in the mentioned equipments without prior consultation with AUK.
KSI-W025-001
8

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