BA681A Rohm, BA681A Datasheet
BA681A
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BA681A Summary of contents
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... BA681A The BA681A is a monolithic IC for LED power meter applications. The display level range is 6mV divided into 12 points with repeated interval spacings of 3dB, 3dB and 4dB. The 0dB level is 180mV range is *30dB to +16dB. The constant current outputs can be set using external components allowing use of different color LEDs in various combinations ...
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... Audio ICs FAbsolute maximum ratings (Ta = 25_C) FElectrical characteristics (unless otherwise noted 25_C, V FComparator level vs. AC and DC input levels 646 = 12V, and f = 1kHz) CC BA681A ...
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... If the LED current is set too high, the allowable power dissipation of the package may be exceeded, so exercise due caution. (2) Input coupling capacitor ( This capacitor connects the BA681A to external input cir- cuits. The recommended value is 2.2 F. Fig.2 ) (3) Input bias resistor (R 1 This resistor is the input impedance. If the value is set too ...
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... (3) Comparator voltage In the case of the BA681A, the comparator voltage is the input voltage when about half LED current setting value (Typ.) is flowing in an LED. Therefore, if the LED current is set to 16mA, the comparator voltage is the value when 8mA is flowing in the LED. ...
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... Audio ICs (6) Application example (display) FTape deck application example BA681A 649 ...
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... Audio ICs FExternal dimensions (Units: mm) 650 BA681A ...