LM2917EP Datasheet (National Semiconductor) - (LM2907EP / LM2917EP) Enhanced Plastic Frequency to Voltage Converter

LM2917EP, (LM2907EP / LM2917EP) Enhanced Plastic Frequency to Voltage Converter

The LM2907EP, LP2917EP series are monolithic frequency to voltage converters with a high gain op amp/comparator designed to operate a relay, lamp, or other load when the input frequency reaches or exceeds a selected rate.

The tachometer uses a charge pump technique and offers frequency doubling for

LM2917EP Features

* n Ground referenced tachometer input interfaces directly with variable reluctance magnetic pickups n Op amp/comparator has floating transistor output n 50 mA sink or source to operate relays, solenoids, meters, or LEDs n Frequency doubling for low ripple n Tachometer has built-in hysteresis with eit