LM1815 datasheet(1/6 Pages) NSC

Nome de Peças	LM1815

Descrição Electrónicos	Adaptive Variable Reluctance Sensor Amplifier

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Fabricante Electrônico	NSC [National Semiconductor (TI)]

Página de início	http://www.national.com

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TLH7893

February 1995

LM1815 Adaptive Variable Reluctance Sensor Amplifier

General Description

The LM1815 is an adaptive sense amplifier and default gat-

ing circuit for motor control applications The sense amplifi-

er provides a one-shot pulse output whose leading edge

coincides with the negative-going zero crossing of a ground

referenced input signal such as from a variable reluctance

magnetic pick-up coil

In normal operation this timing reference signal is process-

ed (delayed) externally and returned to the LM1815 A logic

input is then able to select either the timing reference or the

processed signal for transmission to the output driver stage

The adaptive sense amplifier operates with a positive-going

threshold which is derived by peak detecting the incoming

signal and dividing this down Thus the input hysteresis var-

ies with input signal amplitude This enables the circuit to

sense in situations where the high speed noise is greater

than the low speed signal amplitude Minimum input signal

is 100 mVp-p

Features

Y

Adaptive hysteresis

Y

Single supply operation

Y

Ground referenced input

Y

True zero crossing timing reference

Y

Operates from 2V to 12V supply voltage

Y

Handles inputs from 100 mV to over 120V with external

resistor

Y

CMOS compatible logic

Applications

Y

Position sensing with notched wheels

Y

Zero crossing switch

Y

Motor speed control

Y

Tachometer

Y

Engine testing

Connection Diagram

TLH7893 – 1

Top View

Order Number LM1815M or LM1815N

See NS Package Number M14A or N14A

Truth Table

Signal

Input

Timing

Gated

Input

Select

Input

Output

Pulses

L

X

Pulses

X

H

Pulses

C1995 National Semiconductor Corporation

RRD-B30M115Printed in U S A

Nº de peça semelhante - LM1815

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Texas Instruments	LM1815	1Mb / 17P	LM1815 Adaptive Variable Reluctance Sensor Amplifier
Texas Instruments	LM1815	1Mb / 17P	LM1815 Adaptive Variable Reluctance Sensor Amplifier
ARTSCHIP ELECTRONICS CO...	LM1815	366Kb / 7P	Adaptive Variable Reluctance Sensor Amplifier
Texas Instruments	LM1815	1,005Kb / 18P	LM1815 Adaptive Variable Reluctance Sensor Amplifier REVISED MARCH 2013
National Semiconductor ...	LM1815EP	441Kb / 12P	Enhanced Plastic Adaptive Variable Reluctance Sensor Amplifier

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Descrição semelhante - LM1815

Fabricante Electrônico	Nome de Peças	Folha de dados	Descrição Electrónicos
ON Semiconductor	NCV7001	74Kb / 8P	Quad Variable Reluctance Sensor Interface IC October, 2003 ??Rev. 2
Maxim Integrated Produc...	MAX9924	317Kb / 22P	Variable Reluctance Sensor Interfaces with Differential Input and Adaptive Peak Threshold Rev 0; 10/08
Maxim Integrated Produc...	MAX9924	527Kb / 23P	Variable Reluctance Sensor Interfaces with Differential Input and Adaptive Peak Threshold Rev 2; 3/09
National Semiconductor ...	LM1815EP	441Kb / 12P	Enhanced Plastic Adaptive Variable Reluctance Sensor Amplifier
Maxim Integrated Produc...	MAX9924	399Kb / 23P	Variable Reluctance Sensor Interfaces with Differential Input and Adaptive Peak Threshold Rev 3; 3/11
Maxim Integrated Produc...	MAX9924	348Kb / 23P	Variable Reluctance Sensor Interfaces with Differential Input and Adaptive Peak Threshold Rev 4; 3/12
Texas Instruments	LM1815MX	1Mb / 17P	LM1815 Adaptive Variable Reluctance Sensor Amplifier
Texas Instruments	LM1815	1Mb / 17P	LM1815 Adaptive Variable Reluctance Sensor Amplifier
ARTSCHIP ELECTRONICS CO...	LM1815	366Kb / 7P	Adaptive Variable Reluctance Sensor Amplifier
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