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| 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 3/4.5kHz @ Vcc=5V, Ta=25 E 2 Block Diagram NC 7 NC 8 VCC 1 1 2 3 4 8 7 6 5 NC NC AGND IN 8 SOP RL BIAS IN Output stage Input stage Variable amp BPF AGC OUT 3 5 Photo diode 6 AGND 2 CAGC 4 DGND The information in this document is subject to change without notice. 1 GL3277 Absolute Maximum Ratings (Ta=25 Characteristics Power Supply Voltage Storage Temperature Range , E unless otherwise noted) Pin 1 - Symbol VCC Tstg Value 6 -40 to +125 Unit Vdc E Recommended Operating Condition Characteristics Operating Supply Voltage Operating Temperature Range Pin 1 Symbol VCC Ta Value 4.5 to 5.5 0 to 70 Unit Vdc E Electrical Characteristics Characteristics Operating Supply Current Input Voltage (VCC=5V, Ta=25 Efoper=38kHz, unless otherwise noted) , Symbol Icc VIN Av_max Conditions No Signal MIN 0.3 3.6 0.8 80 40 440 440 4.8 TYP 0.7 4.1 1.3 5 600 600 0.2 5.0 MAX 1.7 4.6 1.8 110 80 770 Unit mA V dB dB kHz REMARK Voltage Gain Av_min BPF Bandwidth ( -3dB ) fBW tpw1 Output Pulse Width tpw2 Low Level Output Voltage High Level Output Voltage note 1 IIN = 0A IIN = -330 E VIN = 30 A p-p Pin2=1.5V VIN = 30 A p-p Pin2=2.5V VIN = 30 A p-p fIN = 38 O burst VIN = 500 A p-p fIN = 38 O burst VIN = 50mVp-p - i s 770 0.4 V V note 1 VOL VOH 60 ms VIN VOUT 600 i s 600 i s tpw VOH VOL t 2 GL3277 Pin Descriptions No 1 2 3 4 5 6 7 8 Symbol VCC CAGC OUT DGND IN AGND NC NC Supply vtg. AGC cap. Output Ground Input Ground - Description Supply voltage of 5V 3/40% 1 AGC capacitor connected. Open collector output with pull-up resistance. Active low output. Input stage, Variable amp, AGC, BPF ground Input connection for photodiode with bias voltage Output stage ground - Application Circuit 5V 33 O 1 VCC NC 8 output 3 OUT GL3277 2 CAGC NC 7 6 AGND 47 i F 60 nF 4 DGND IN 5 photo diode 3 |
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