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LM2917 Datasheet PDF

Part Series:LM2917 Series
Category:Semiconductors & Actives
Description:TEXAS INSTRUMENTS LM2917N/NOPB Voltage to Frequency Converter, 5kHz, 0.3%, 28V, DIP, 14Pins
Document:LM2917N/NOPB Datasheet PDF (38 Pages)

LM2917 Datasheet PDF Semiconductors & Actives

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Frequency To Voltage Converter

LM2917N/NOPB - TI Specifications

TYPE
DESCRIPTION
Mounting Style
Through Hole
Frequency
5 kHz
Number of Pins
14 Pin
Case/Package
DIP-14
Power Rating
1.58 W
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LM2917N/NOPB - TI Function Overview

The LM2907 and LM2917 devices are monolithic frequency-to-voltage converters with a high gain op amp 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 in two versions (8-pin LM2907 and LM2917), and its output swings to ground for a zero frequency input.
The op amp is fully compatible with the tachometer and has a floating transistor as its output. This feature allows either a ground or supply referred load of up to 50 mA. The collector may be taken above VCC up to a maximum VCE of 28 V.
The two basic configurations offered include an 8-pin device with a input and an internal connection between the tachometer output and the op amp noninverting input. This version is well suited for single speed or frequency switching or fully buffered frequency-to-voltage conversion applications.
The more versatile configurations provide differential tachometer input and uncommitted op amp inputs. With this version the tachometer input may be floated and the op amp becomes suitable for active filter conditioning of the tachometer output.
Both of these configurations are available with an active shunt regulator connected across the power leads. The regulator clamps the supply such that stable frequency-to-voltage and frequency-to-current operations are possible with any supply voltage and a suitable resistor.
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