FIGURE 5. LS6501LP DIFFERENTIAL INTERFACE TO PIR SENSOR PAIR

R1 = 36k

Ω

C1 = 100µF

R2 = 2.7M

Ω

C2 = .01µF

R3 = 36k

Ω

C3 = 33µF

R4 = 2.7M

Ω

C4 = .01µF

R5 = 36k

Ω

C5 = 33µF

R6 = 36k

Ω

C6 = 33µF

R7 = 36k

Ω

C7 = .01µF

R8 = 36k

Ω

C8 = .1µF

R9 = 5.6M

Ω

C9 = .1µF

R10 = 5.6M

Ω

PIRs = HEIMANN LHi 958 or 878 (Typical)

All Resistors 1/4 W. All Capacitors 10V

6501-070202-7

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

14

15

16

R8

C9

R1

C1

PIR

SENSOR 1

R2

C2

LS6501LP

R7

C8

R10

R9

C7

R6

C6

R5

C5

PIR

SENSOR 2

+

-

+

-

+

-

+

-

The information included herein is believed to be

accurate and reliable. However, LSI Computer Systems,

Inc. assumes no responsibilities for inaccuracies, nor for

any infringements of patent rights of others which may

result from its use.

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