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| 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 S1A2284A01-I0U0 S1A2284A02-I0U0 Package 9-SIP Operating Temperature - 20C - + 80C ID 15mA 7mA 1 S1A2284A01/02 5 DOT LED LEVEL METER DRIVER BLOCK DIAGRAM REFERENCE VOLTAGE LED DRIVER D1 D2 D3 D4 D5 1 D1 2 D2 3 D3 4 D4 5 GND 6 D5 7 OUTPUT 8 INPUT 9 Vcc NOTE: Capacitor to be omitted when used as a DC input signal meter ABSOLUTE MAXIMUM RATINGS (Ta = 25C) Characteristic Supply Voltage Amp Input Voltage Pin 7 Voltage D Terminal Output Voltage Circuit Current D Terminal Output Current Power Dissipation Operating Temperature Storage Temperature Symbol VCC V8-5 V7-5 VD ICC ID Pd TOPR TSTG Value 18 -0.5 - VCC 6 18 12 20 1100 -20 - + 80 -40 - + 125 Unit V V V V mA mA mW C C NOTE: 11mW/C is decreased at higher temperature than Ta = 25C. 2 5 DOT LED LEVEL METER DRIVER S1A2284A01/02 ELECTRICAL CHARACTERISTICS (Ta = 25C, VCC = 6V, f = 1kHz, unless otherwise specified) Characteristic Circuit Current D Output Current Input Bias Current Amp Gain S1A2284A01 S1A2284A02 Symbol ICCQ IO IBIAS GV VCL(ON)1 VCL(ON)2 Comparator ON Level VCL (ON) VCL(ON)3 VCL(ON)4 VCL(ON)5 NOTE: Definition of 0dB: input voltage level when VCL (ON)3 turn ON (50mV) Test Conditions Vi = 0V Vi = 0.15V - VI = 0.1 V Min. - 11 5 -1 24 -12 -6 Typ. 6 15 7 - 26 -10 -5 0 3 6 Max. 8.5 18.5 9.5 0 28 -8 -4 - 3.5 7 Unit mA mA A dB - - 2.5 5 dB TEST CIRCUIT S1A2284A01/02 1 2 3 4 5 6 7 8 9 2.2 F/16V C1 D1 D2 D3 D4 D5 10k 10 F/16V 10k C2 INPUT R Vcc C2 : AC in, 2.2 F is used. DC in, 2.2 F is shorted. 3 S1A2284A01/02 5 DOT LED LEVEL METER DRIVER The recommended value of R at Ta (max) = 60C. VCC (V) R() 8 - 12 47 10 -14 68 12 - 16 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 |
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