ls6501lp LSI Computer Systems, Inc., ls6501lp Datasheet

ls6501lp

Manufacturer Part Number

ls6501lp

Description

Pir Sensor Interface

Manufacturer

LSI Computer Systems, Inc.

Datasheet

1.LS6501LP.pdf (8 pages)

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6501LP-090806-1

FEATURES:

• Low Quiescent Current

• Direct Interface with PIR Sensor

• Two-Stage Differential Amplifier

• Amplifier Gain and Bandwidth externally controlled

• Window Comparator and Digital Filter limit Noise

• Triac or Relay Output Drive

• Programmable Output Duration Timer

• Ambient Light Level Inhibit input

• Selectable Dead Time

• Single or Dual Pulse Detection

• Timing derived from RC Oscillator or 50Hz/60Hz AC

• Regulated 5V Output for PIR Sensor

• Motion Detection LED Indicator

• LS6501LP (DIP); LS6501LP-S (SOIC-NB);

APPLICATIONS:

Indoor occupancy sensors and outdoor motion-triggered

lighting for energy savings, security and convenience.

DESCRIPTION: (See Figure 2)

The LS6501LP is a CMOS integrated circuit, designed for

detecting motion from a PIR Sensor and initiating appropri-

ate responses. The detailed description of the functional

blocks is as follows:

DIFFERENTIAL AMPLIFIER

Each stage of the two stage Differential Amplifier can be set

to have its own amplification and bandwidth. The two inputs

to the first stage allow for single ended or differential con-

nection to PIR Sensors. This stage can be biased anywhere

in its dynamic range. The second stage is internally biased

so that the Window Comparator’s lower and higher thresh-

olds can be fixed relative to this bias.

WINDOW COMPARATOR

The Window Comparator provides noise filtering by enabling

only those signals equal to or greater than a fixed threshold

at the output of the Differential Amplifier to appear at the

output of the Window Comparator.

COMPARATOR DIGITAL FILTER

The output of the Window Comparator is filtered so that

motion must be present for a certain duration before it can

be recognized and appear as pulses at the Digital Filter

output.

LS6501LP-SW (SOIC-WB) - See Figure 1

U L

A3800

LSI/CSI

LSI Computer Systems, Inc. 1235 Walt Whitman Road, Melville, NY 11747

PIR SENSOR INTERFACE

TRIAC/RELAY OUTPUT

DIFF. AMP. 2 INPUT (-)

DIFF. AMP. 1 OUTPUT

DIFF. AMP. 2 OUTPUT

OSCILLATOR INPUT

OUTPUT DURATION TIMER

The voltage level at the TIMER CONTROL input can

select 16 different timeouts for this Timer (See Table 1).

The selection can be made by varying the setting of a

potentiometer. The Timer is retriggerable and controls

the ON duration of the TRIAC/RELAY output. The trigger

for the Timer is generated from pulses appearing at the

Digital Filter output.

SINGLE PULSE/DUAL PULSE MODES

A Single Pulse or Dual Pulse (two pulses occurring within

a specified time period) at the Digital Filter output can be

selected as the trigger for the Output Duration Timer.

This selection is made by the logic level at the PULSE

MODE SELECT input. Logic 0 = Single Pulse Mode,

logic 1 = Dual Pulse Mode.

LED OUTPUT

This is an open drain output which is turned on by pulses

generated by a retriggerable one-shot. The one-shot is

triggered by the leading edge of pulses appearing at the

Digital Filter output. When turned on, this output can sink

current from a series Resistor-LED network returned to a

positive voltage (V

the LED lighting whenever motion is detected.

AC INPUT

PIN ASSIGNMENT - TOP VIEW

LS6501LP

(631) 271-0400 FAX (631) 271-0405

to 12.5V maximum). This results in

FIGURE 1

DIFF. AMP 1 INPUT (-)

DIFF. AMP 1 INPUT (+)

September 2006

5V REGULATOR OUTPUT

TIMER CONTROL INPUT

DEAD TIME SELECT INPUT

INHIBIT INPUT

LED OUTPUT

PULSE MODE

SELECT INPUT

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ls6501lp Summary of contents

Page 1

... Indoor occupancy sensors and outdoor motion-triggered lighting for energy savings, security and convenience. . DESCRIPTION: (See Figure 2) The LS6501LP is a CMOS integrated circuit, designed for detecting motion from a PIR Sensor and initiating appropri- ate responses. The detailed description of the functional blocks is as follows: ...

Page 2

... INPUT STATE 0 OPEN 1 6501LP-012703-2 DC REGULATOR The LS6501LP includes a Regulator which provides a nominal +5V to the Differential Amplifier and Window Comparator and is available as an output to supply the PIR Sensor. TRIAC/RELAY OUTPUT This open drain output turns ON when the Output Dura- tion Timer is triggered. The output drives a Triac when the OSCILLATOR input is tied to ground and 50/60Hz is applied to the AC input (See Figure 3) ...

Page 3

ABSOLUTE MAXIMUM RATINGS: PARAMETER DC supply voltage Any input voltage Operating temperature Storage temperature ELECTRICAL CHARACTERISTICS: ( All voltages referenced PARAMETER SYMBOL SUPPLY CURRENT ...

Page 4

... REG - COMP + REG DIGITAL FILTER V REG - PULSE COMP SELECT + LOGIC CONTROL LOGIC INHIBIT DEAD TIME TIMER FIGURE 2. LS6501LP BLOCK DIAGRAM MAX UNIT CONDITIONS - mA With 3V Triac Gate Drive - mA With 1V Max. across the LS6501LP. 45 µ 8V 60Hz and DD 1.32 ms 2.7V P-P AC input 150 µ 60Hz ...

Page 5

... NOTES: 1. The R9, R10, C9 network provides a 2.7V Peak-to-Peak AC signal input to Pin 5. 2. The C8, D1, Z1, C7, R7 components generate the DC Supply Voltage for the LS6501LP. 3. The R2, C2, R3, C3, R4, C4, R5, C5, R6, C6 components and the two on-chip Differential Amplifiers set a nominal gain of 5,500 with bandpass filtering of 0.13Hz to 6Hz. ...

Page 6

... DC Supply Voltage for the LS6501LP. 2. The R10, R9, Q2, R8, R7, Q1 components interface LS6501LP Pin Relay Coil returned to a separate High-Voltage DC Supply Relay Coil returned to a maximum of 12.5V can be directly driven by the LS6501LP Pin 7. FIGURE 4. TYPICAL DC RELAY APPLICATION 6501LP-090806-6 ...

Page 7

... 36k 36k R6 = 36k R7 = 36k R8 = 36k R9 = 5.6M R10 = 5.6M All Resistors 1/4 W. All Capacitors 10V NOTE: A pair of PIR Sensors may be used in applications where a wider optical field of view is needed. FIGURE 5. LS6501LP DIFFERENTIAL INTERFACE TO PIR SENSOR PAIR 6501LP-090806 AMP 1 (-)IN AMP (+)IN R10 ...

Page 8

VOLT INPUT For industrial applications a 12 Volt DC power supply can be used to power one or several low volt- age PIR modules for many types of motion detection requirements. The low voltage, low current switch S1 provides ...

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