6511-090606-4

R1 = 1k

Ω

R6 = 36k

Ω

C1 = 100µF

C6 = 10µF

R2 = 1.5M

Ω

R7 = 36k

Ω

C2 = 0.003µF

C7 = 0.01µF

R3 = 36k

Ω

R8 = 36k

Ω

C3 = 10µF

C8 = 0.1µF

R4 = 1.5M

Ω

R9 = 5.6M

Ω

C4 = 0.003µF

C9 = 0.1µF

R5 = 36k

Ω

R10 = 2.4M

Ω

C5 = 10µF

C10 = 0.1µF

PIRs = Perkin-Elmer LHi 954, 958, 978, 874 or 878; Nicera RE200B, SDA02-54 (Typical)

All Resistors 1/4 W. All Capacitors 10V.

NOTES: 1) A pair of PIR Sensors may be used in applications where a wider optical field of view is needed.

2) External 5V Regulator drives the LS6511 and PIR sensor.

FIGURE 4. DIFFERENTIAL INTERFACE TO PIR SENSOR PAIR

AMP 1

OUT

AMP 1

(-) IN

AMP 2

(-) IN

AMP 1

(+) IN

AMP 2

OUT

5V REG

OUT

C3

R3

C4

R4

1

2

3

12

13

14

R8

C9

R1

C1

PIR

SENSOR 1

R2

C2

LS6511

R7

C8

R10

R9

C7

R6

C6

R5

C5

PIR

SENSOR 2

+

-

+

-

+

-

+

-

5V

C10

+

-

11

AMP

AMP

COMP

COMP

DIFF AMP 2

OUTPUT

DIFF AMP 2

INPUT (-)

DIFF AMP 1

OUTPUT

DIFF AMP 1

INPUT (-)

DIFF AMP 1

INPUT (+)

SHUNT

REGULATOR

PROGRAMMABLE

RETRIGGERABLE

ONE-SHOT

OUTPUT

DURATION

TIMER

WINDOW

TIMER

5 V REGULATOR

OUTPUT

LED/RELAY

OUTPUT

DRIVER

M

U

X

WINDOW

COMPARATOR

DIGITAL

FILTER

DIGITAL

FILTER

PROGRAMMABLE

RETRIGGERABLE

ONE-SHOT

LED/RELAY

OUTPUT

DRIVER

DIGITAL FILTER RC

MODE

SELECT

DURATION

TIMER RC

UNDERVOLTAGE

DETECTOR

3

2

1

14

13

11

10

12

6

7

9

8

4

-

+

-

+

+

-

+

-

5

CONCURRENT PULSE/

DUAL PULSE RC

FIGURE 5. LS6511 BLOCK DIAGRAM