LM2917N Frequency to Voltage Converter, 10kHz, 0V to 28V, DIP-14

The LM2917/NOPB 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 low ripple, full input protection and output swings to ground for a zero frequency input.

* Ground referenced tachometer input interfaces directly with variable reluctance magnetic pickups * Op Amp/Comparator has floating transistor output * 50mA sink or source to operate relays, solenoids, meters, or LEDs * Frequency doubling for low ripple * Tachometer has built-in hysteresis with either differential input or ground referenced input * Built in zener * ±0.3% linearity typical * Ground referenced tachometer is fully protected from damage due to swings above VCC and below ground * No lead content