Datasheet for the LM2907, a frequency-to-voltage converter IC, supplied as a 326 KB PDF. The part combines a charge-pump input stage with an op-amp and output transistor, and it is commonly found in tachometer, speed-switch and motor-control circuits. Technicians use the document to check pinout, supply limits, typical application schematics and the formulas that set output voltage from input frequency. Confirm the exact suffix and package marking on the chip, since 8-pin and 14-pin versions have different pin assignments.
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