GL3277 GL3277 PREAMPLIFIER FOR REMOTE CONTROL USE Description Pin Configurations The GL3277 is a bipolar analog ICs specifically developed for use in infrared remote control system VCC receiving preamplifiers. Features CAGC • Enhanced immunity against all kinds of disturbance light OUT • No occurence of disturbance pulses at the output • Output active low DGND • Simple applications • Support RC-5 code , NEC code • Operating frequency : 38kHz¡ ¾2.5kHz @ Vcc=5V, Ta=25¡ É 1 8 NC 2 7 NC 3 6 AGND 4 5 IN 8 SOP Block Diagram NC 7 NC 8 VCC 1 RL BIAS IN 3 Input stage Photo diode OUT Output stage 5 Variable amp BPF AGC 2 6 AGND 4 CAGC DGND The information in this document is subject to change without notice. 1 GL3277 Absolute Maximum Ratings (Ta=25¡ , unless otherwise noted) É Characteristics Pin Symbol Value Unit Power Supply Voltage 1 VCC 6 Vdc Storage Temperature Range - Tstg -40 to +125 ¡ É Characteristics Pin Symbol Value Unit Operating Supply Voltage 1 VCC 4.5 to 5.5 Vdc Operating Temperature Range - Ta 0 to 70 ¡ É Recommended Operating Condition Electrical Characteristics (VCC=5V, Ta=25 ¡ É, foper=38kHz, unless otherwise noted) Characteristics Symbol Operating Supply Current Icc Input Voltage VIN Av_max Voltage Gain Av_min BPF Bandwidth ( -3dB ) fBW tpw1 Output Pulse Width tpw2 MIN TYP MAX Unit No Signal 0.3 0.7 1.7 mA IIN = 0A IIN = -330§ Ë VIN = 30§ Å p-p Pin2=1.5V VIN = 30§ p-p Å Pin2=2.5V 3.6 0.8 4.1 1.3 4.6 1.8 V 80 - 110 dB 40 - 80 dB VIN = 30§ Å p-p - 5 - kHz 440 600 770 440 600 770 Conditions fIN = 38§ Õburst VIN = 500§ Å p-p fIN = 38§ Õburst VIN = 50mVp-p ¥ ìs Low Level Output Voltage VOL - - 0.2 0.4 V High Level Output Voltage VOH - 4.8 5.0 - V REMARK note 1 note 1 60 ms VIN VOUT 600¥ ìs 600¥ ìs tpw VOH VOL t 2 GL3277 Pin Descriptions Description No Symbol 1 VCC Supply vtg. Supply voltage of 5V¡ ¾ 10% 2 CAGC AGC cap. AGC capacitor connected. 3 OUT Output Open collector output with pull-up resistance. Active low output. 4 DGND Ground Input stage, Variable amp, AGC, BPF ground 5 IN Input Input connection for photodiode with bias voltage 6 AGND Ground Output stage ground 7 NC - 8 NC - - Application Circuit 33 ¥ Ø 1 VCC NC 8 2 CAGC NC 7 3 OUT 4 DGND GL3277 5V output 47¥ ì F 60 nF AGND 6 IN 5 photo diode 3