5 DOT LED LEVEL METER DRIVER S1A2284A01/02 INTRODUCTION The S1A2284A01 and S1A2284A02 are monolithic integrated circuits designed for 5-dot LED level meter drivers with a builtin rectifying amplifier. It is suitable for AC/DC level meters such as VU meters or signal meters. 9−SIP FEATURES • High gain rectifying amplifier included (GV = 26dB) • Low radiation noise when LED turns on • Logarithmic indicator for 5-dot bar type LED (−10, −5, 0, 3, 6dB) • Constant current output S1A2284A01: lo = 15mA (Typ) S1A2284A02: Io = 7mA (Typ) • Wide operating supply voltage range: VCC = 3.5V − 1 6V • Minimum number of external parts required ORDERING IN FORMATION Device Package Operating Temperature 9−SIP − 20°C − + 80°C S1A2284A01-I0U0 S1A2284A02-I0U0 ID 15mA 7mA 1 S1A2284A01/02 5 DOT LED LEVEL METER DRIVER BLOCK DIAGRAM REFERENCE VOLTAGE LED DRIVER D1 D2 D4 D3 D5 1 2 3 4 5 6 7 8 9 D1 D2 D3 D4 GND D5 OUTPUT INPUT Vcc NOTE: Capacitor to be omitted when used as a DC input signal meter ABSOLUTE MAXIMUM RATINGS (Ta = 25°C) Characteristic Symbol Value Unit Supply Voltage VCC 18 V Amp Input Voltage V8-5 −0.5 − VCC V Pin 7 Voltage V7-5 6 V D Terminal Output Voltage VD 18 V Circuit Current ICC 12 mA D Terminal Output Current ID 20 mA Power Dissipation Pd 1100 mW Operating Temperature TOPR −20 − + 80 °C Storage Temperature TSTG −40 − + 125 °C NOTE: 11mW/°C is decreased at higher temperature than Ta = 25°C. 2 5 DOT LED LEVEL METER DRIVER S1A2284A01/02 ELECTRICAL CHARACTERISTICS (Ta = 25°C, VCC = 6V, f = 1kHz, unless otherwise specified) Characteristic Symbol Circuit Current Test Conditions Min. Typ. Max. Unit − 6 8.5 mA 11 15 18.5 5 7 9.5 −1 − 0 µA 24 26 28 dB VCL(ON)1 −12 −10 −8 VCL(ON)2 −6 −5 −4 − 0 − VCL(ON)4 2.5 3 3.5 VCL(ON)5 5 6 7 ICCQ S1A2284A01 D Output Current Vi = 0V IO S1A2284A02 Input Bias Current Vi = 0.15V − IBIAS Amp Gain GV Comparator ON Level VCL (ON) VI = 0.1 V − VCL(ON)3 mA dB NOTE: Definition of 0dB: input voltage level when VCL (ON)3 turn ON (50mV) TEST CIRCUIT S1A2284A01/02 1 2 3 4 5 6 7 8 9 Vcc 2.2µ F/16V C2 C1 D1 D2 D3 D4 D5 10kΩ INPUT 10kΩ R 10µ F/16V C2 : AC in, 2.2 µ F is used. DC in, 2.2 µ F is shorted. 3 S1A2284A01/02 5 DOT LED LEVEL METER DRIVER The recommended value of R at Ta (max) = 60°C. VCC (V) 8 − 12 10 −14 12 − 16 R(Ω) 47 68 91 By changing the time constant C1 and C2, the response, attack and release time may be varied. In the above application conditions, power dissipation may be operated at higher levels than the absolute maximum ratings. The wattage of R is to be determined by the total LED current and R value recommended by the R table. 4