KA2181 REMOTE CONTROL PREAMPLIFIER REMOTE CONTROL PREAMPLIFIER The KA2181 is a silicon monolithic integrated circuit designed for a remote control preamplifier of infrared signals. This device has features of low power, high sensitivity and wide supply voltage. 8-SIP FUNCTIONS • AMP • ABLC • LIMITER & LEVEL SHIFT • PEAK DET • SHAPING FEATURES • Wide operation voltage VCC=6 to 14.4V • Low power consumption ICC=2.5mA Typ. ORDERING INFORMATION • High input sensitivity 50µVP-P Typ. • Peak detector Device Package Operating Temperature • Small size package 8-SIP KA2181 8-SIP -20°C ~+75°C • A minimum number of parts are required • Designed for use with the KS5803 remote control transmitter IC. BLOCK DIAGRAM + + Tuning Coil VCC 6 ~14.4V Peak Hold Capacitor 3 4 8 Power Supply BIAS PIN-Photo Diode Shaping AMP Limiter & Level shift 7 Peak DET Input 1 ABLC 6 2 5 By-pass Capacitor Ground + Fig. 1 Integral Capacitor Output KA2181 REMOTE CONTROL PREAMPLIFIER ABSOLUTE MAXIMUM RATINGS (TA=25°C) Characteristic Supply Voltage Power Dissipation Operating Temperature Storage Temperature Symbol Value Unit VCC PD TOPR TSTG 15 270 -20~+75 -45~+125 V mW °C °C RECOMMENDED OPERATING CONDITIONS Characteristic Symbol Min. Typ. Max. Unit VCC f IN 6.0 30 8.5 - 14.4 50 V KHz Power Supply Input Frequency ELECTERICAL CHARACTERISTICS (TA=25°C, VCC=8.5V, fIN=40KHz) Characteristic Symbol Supply Current Input Terminal Voltage Input Terminal Voltage ICC VIN 1 VIN 2 1st Stage Voltage Gain AVL Detection Input Voltage Input Impedance υ IN γ IN Output Voltage VOL Output Leakage Current Noise IOH Test Conditions IIN=70µA #7-#3, VOUT=500mVP-P IOL=0.1mA, υ IN=7mVP-P VOH=14.4V Input Open Min. Typ. Max. Unit 1.5 2.1 3.4 2.5 2.6 4.1 3.5 3.1 4.9 mA V V - 60 - dB 40 50 60 100 80 µVP-P KΩ - - 0.5 V 2 Output Terminal is not fall µA KA2181 REMOTE CONTROL PREAMPLIFIER TYPICAL APPLICATION CIRCUITS 1KΩ + 10µF + 10µF L 3300pF 3 + 150KΩ 4 VCC 47µF 100KΩ 8 AMP Shaping 7 Limiter & Level shift PIN-Photo Diode Peak DET BIAS 5 2 1 Out ABLC 47µF 22Ω 6 0.033µF + Fig. 2 TEST CIRCUITS L . . . 5mH C . . . 3300pF R . . . 100KΩ KA2181 8 6 4 3 2 1 VOUT 22Ω 51Ω 4.7µF OUT R C + 10µF L 0.033µF + + VIN 5 150KΩ 10µF 7 100KΩ + 100µF VCC=8.5V Fig. 3