SIC1819 Coreless Tachometer/Speedometer Driver

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SIC1819 Coreless Tachometer/Speedometer Driver [Copy link]

SIC1819 Coreless Tachometer/Speedometer Driver SIC1819 is a driver for automotive tachometers (dynamic-magnetic tachometers/speedometers). The chip contains a reference voltage source, a Norton amplifier, a function generator with sine and cosine output characteristics, and an NPN transistor driver. When outputting 20mA current, the symmetrical voltage is ±4.5V, and the nonlinearity within the range of 305° is less than 2%. The electrical parameters fully meet the requirements of foreign LM1819 and CS289, and can be used interchangeably. Features ? 20mA output ? 12V operating voltage ? Function generator ? Non-linearity less than 2% ? DIP14L package Applications ? Tachometer Drivers ? Odometer Drivers Absolute Maximum parameter Pinout Minimum Maximum unit Supply voltage 13 　 20 V Power dissipation 　 　 1300 mW Storage temperature range 　 -65 +150 ℃ Operating temperature range 　　 -40 +85 ℃ Lead wire temperature (10s) 　　 　 +260 ℃ CEO 　 20 　 V Electrical Characteristics (Unless otherwise specified, TA = 25 ℃, VS = 13.1V) parameter Pinout Test conditions Minimum Typical Value Maximum unit Supply Current 13 Zero input frequency; Figure 3 　 　 65 mA Reference voltage 11 I REG =0mA 8.1 8.5 8.9 V Reference source output resistance 11 I REG =0mA―3mA 　 13.5 　 Ω Reference voltage 4 I REF =0mA 1.9 2.1 2.3 V Reference voltage output resistance 4 I REF =0―50μA 　 5.3 　 KΩ Norton Amplifier Gain 5,6 I BIAS ≈ 20μA 0.9 1.0 1.1 　 Feedback bias current of function generator 1 V1 = 5.1V 　　 1.0 　 mA Output Voltage (Sine and Cosine) 2 ,12 External drive; I LOAD =20mA ± 4 ± 4.5 　 V Sine output voltage 2 Zero input; V8 = VREF - 350 0 +350 mV Function Generator Linearity 　 FSD=305 o 　 　 ± 1.7 %FSD Function Generator Gain 　 Deflection of the table / ΔＶ8 50.75 53.75 56.75 o / Δ