IC FOR PROXIMITY DETECTOR

AM 313

analog microelectronics

April 2005

Analog Microelectronics GmbH

Phone: +49 (0)6131/91 073 – 0

1/4

An der Fahrt 13, D – 55124 Mainz

Fax:

+49 (0)6131/91 073 – 30

Internet: www.analogmicro.de

E–Mail: info@analogmicro.de

GENERAL DESCRIPTION

The AM 313 is a bipolar monolithic Integrated Circuit designed for proximity detection appli-

cations. The function is based on the damping of an LC oscillator which switches a transistor and

LED output.

FEATURES

• Wide Supply Voltage Range from 4.75 to 35V

• Supply Current Without Oscillator typical 1mA

• Complementary Outputs with Short–Circuit Protection

• P–Type Drivers for PNP Bipolar and PMOS Transistors

• Adjustable Output Current From 100µA to 12mA

• Adjustable Detection Distance and Hysteresis

• Adjustable Temperature Compensation for Detection Distance

• Protection against False Polarity

• Power–On–Delay

• LED Output 4mA typical

BLOCK DIAGRAM

14

5

7

2

1

16

15

4

3

6

8

9

10

11

Oscillator

Rectifier

Hysteresis

Power-On

Level

Voltage

Reference

Schmitt

Trigger

Power-On

Delay

Amplifier

Short-Circuit

Detection

Output

Stages

Drive

Current

LED

VREF

RK

LC

RD

RH

CGL

LED

GND

RS

Q

RM

CABT

VCC

Q

Figure 1