SL2055 Semiconductor 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 Outline Dimensions Package Code SOP-8 unit : mm KSI-W025-001 1 SL2055 Maximum Ratings (Ta = 25°C) Characteristics Symbol Rating Unit Supply Voltage Vcc 17 V Input Voltage VIN 5 Vp-p Operating Temperature Tope -20 ~ 75 °C Storage Temperature Tstg -55 ~ 150 °C Pd 270 mW Allowable Power Dissipation Block Diagram 4 3 V CC2 fo 1 RS V CC1 RL HEA D A MP IN+ LI MI T ER 2 DET ECT O R 8 BP F + TRAP W A V EF O R M S HA P ER O UT A BLC I N- G ND 5 7 Cd 6 PIN Description Pin. No Symbol Pin Voltage Description 1 Vcc1 5.0 The Power Supply Voltage 2 Out 5.0 Active Low Output Terminal and an Open Collector Output 3 Vcc2 4 fo 1.4 5 GND - 6 Cd 1.5 The Detection Capacitor for the most Output Pulse Width Variation and Noise Reduction 7 IN- 2.5 Setting the Frequency Characteristics and Gain of the Head Amplifier 8 IN+ 2.5 The Power Output Voltage Setting the Center Frequency of the Built-in BPF Ground The input Signal Internal Impedance : 75KΩ (typ.) KSI-W025-001 2 SL2055 Electrical Characteristics(VCC=5V, Ta=25 °C) Item Symbol Test Condition Input Signal Input Pin Vol1 Vin1 Input Pin Vol2 Vin2 Output Voltage (Low Level) VOL ON-SW Test Pin Rating Unit Remark Min. Typ. Max. 1 8 2.0 2.5 3.1 V Iin=300µA 1,4,6 8 0.6 0.9 1.7 V VP6=1V 3,5 2 - 0.2 0.4 V 1,5 1 1.0 1.9 2.8 mA Consumption Current ICC Input Impedance Zin fin=38KHz,CW, Vin=0.2VPP 1,4,8 8 45 75 125 KΩ Voltage Gain Av fin=38KHz Vin=30µVpp 2,4,7,8 6 68 - 82 dB BPF Bandwidth fBW -3dB Bandwidth Vin=30µVPP 2,4,7,8 6 1.0 - 2.0 KHz Detecting Ability(1) TPW1 fin=38KHz Vin=60µVPP, Burst Wave 1,4,7,8 2 440 540 770 µSec Note2 Detecting Ability(1) TPW2 fin=38KHz Vin=50mVPP, Burst Wave 1,4,7,8 2 440 660 770 µSec Note2 Note1 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 O UT + C3 130K V CC 5V 47μF 4 3 2 1 7 8 SL2055 SL 2055 5 6 SW1 SW2 R7 100Ω SW3 SW5 SW6 C9 470n F SW7 R8 75K C7 1800p F R6 290K C6 0.01μF SW4 V P6 C8 470 ㎋ IN 300μA SW8 R9 50Ω S I G NA L G ENER A T O R Application Circuit C7 1800p F R 0 R7 0 ~ 1KΩ P HO TO D IO D E 8 7 C6 0 .0 1 μ F 6 5 SSL2055 L 2055 1 2 3 4 R4 ++ P O W ER S UP P LY O UT KSI-W025-001 130K C3 47μF 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 (ground pin) Fo (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 5V±10% is applied to this terminal KSI-W025-001 5 SL2055 I/O Waveforms Description I/O Pin Waveform Operation Converts the Signal Current Voltage and amplifies it. 40u V p -p t o 2.5 V p -p Input (Pin8) of Photodiode s tan dard 38 KHz 600u S S t a n d a r d Suppresses the Noise Component with BPF BPF Output (Pin6) Integrates the Signal Component and make it as Rectangular Wave Output from Comparator. 5V 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 90 4 80 fc - Frequency - KHz Ics - Supply Current - mA 5 3 2 1 0 3.5 4 4.5 5 5.5 6 6.5 V c c - S u pply V oltage - V 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 -KΩ V olt a ge G a in V S . In pu t Fre qu e n c y 100 V c c = 5V R 2 = 130KΩ V i = 30u V p -p 90 Av - Voltage Gain - dB 80 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 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