NTE995M

NTE995 & NTE995M Integrated Circuit Frequency–to–Voltage Converter Description: The NTE995 (14–Lead DIP) and NTE995M (8–Lead DIP) 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 its output swings to GND for a zero frequency input. Advantages: D Output Swing to GND for Zero Frequency Input D Easy to Use: VOUT = fIN x VCC x R1 x C1 D Only One RC Network Provides Frequency Doubling D Zener Regulator On Chip Allows Accurate and Stable Frequency to Voltage or Current Conversion Features: D Ground Referenced Tachometer Input Interfaces Directly with Variable Reluctance Magnetic Pickups D OP Amp/Comparator has Floating Transistor Output D 50mA Sink or Source to Operate Relays, Solenoids, Meters, or LEDs D Frequency Doubling for Low Ripple D Tachometer has Built–In Hysteresis with Either Differential Input or Ground Referenced Input D Built–In Zener Diode D ±0.3% Linearity Typical D Ground Referenced Tachometer is Fully Protected from damage Due to Swings Above VCC and Below GND Applications: D Over/Under Speed Sensing D Frequency to Voltage Conversion (Tachometer) D Speedometers D Breaker Point Dwell Meters D Hand–Held Tachometer D Speed Governors D D D D D Cruise Control Automotive Door Lock Control Clutch Control Horn Cont...