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.

Features:
● 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 Diode
● ±0.3% Linearity Typical
● Ground Referenced Tachometer is Fully Protected from damage Due to Swings Above VCC and Below GND

Advantages:
● Output Swing to GND for Zero Frequency Input
● Easy to Use: VOUT = fIN x VCC x R1 x C1
● Only One RC Network Provides Frequency Doubling
● Zener Regulator On Chip Allows Accurate and Stable Frequency to Voltage or Current Conversion

Applications:
● Over/Under Speed Sensing
● Frequency to Voltage Conversion (Tachometer)
● Speedometers
● Breaker Point Dwell Meters
● Hand–Held Tachometer
● Speed Governors
● Cruise Control
● Automotive Door Lock Control
● Clutch Control
● Horn Control
● Touch or Sound Switches