High Performance Automotive Sonar Intrusion – Data Sheet

AS8413

March 2001

Page 14 of 15

Application Circuit

A typical Application Circuit for the AS8413 is presented at Fig. 8, where a 400 kHz oscillator with

external ceramic resonator is built for each IC. This circuit is suitable to be used in a microcon-

troller-based alarm system.

Optionally, the microcontroller could synthesize a 40 kHz for the ICs, decreasing component

count and power at the system level. The digital sensitivity also can be controlled, in specific

applications.

If access to all the signalling outputs of both ICs is provided, the alarm system will be able to

identify the kind of disturbance detected and the region where it occurred.

Fig. 8 - Application Circuit

TX1

OSCIN

OSCOUT

COSC

VCAP

AVDD

AGND

RXGND

RX

SEL4OK

ALEN

MODE

1

2

3

4

5

6

7

8

9

10

11

12

24

23

22

21

20

19

18

17

16

15

14

13

TX2

ALARM

WARN

LED

SYNC

GND

VDD

TP

N.C.

SAS

SENS1

SENS0

VDD

VDD

100 p

Res.

400kHz

100n

VDD

100p

270p

100n

VDD

VDD

330

56k

VDD

TX1

OSCIN

OSCOUT

COSC

VCAP

AVDD

AGND

RXGND

RX

SEL4OK

ALEN

MODE

1

2

3

4

5

6

7

8

9

10

11

12

24

23

22

21

20

19

18

17

16

15

14

13

TX2

ALARM

WARN

LED

SYNC

GND

VDD

TP

N.C.

SAS

SENS1

SENS0

TX

S

VDD

VDD

100 p

Res.

400kHz

100n

VDD

100p

270p

100n

RX

S

VDD

VDD

330

56k

VDD

(MASTER)

(SLAVE)