NTE995 Datasheet, PDF (1/4 Pages) NTE Electronics – Integrated Circuit Frequency-to-Voltage Converter

NTE995 & NTE995M
Integrated Circuit
Frequency–to–Voltage Converter
Description:
The NTE995 (14–Lead DIP) and NTE995M (8–Lead DIP) are monolithic frequency to voltage con-
verters 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 tech-
nique 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: V_OUT = f_IN x V_CC 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 V_CC
and Below GND
Applications:
D Over/Under Speed Sensing
D Cruise Control
D Frequency to Voltage Conversion (Tachometer) D Automotive Door Lock Control
D Speedometers
D Clutch Control
D Breaker Point Dwell Meters
D Horn Control
D Hand–Held Tachometer
D Touch or Sound Switches
D Speed Governors