AM313 [AME]

IC FOR PROXIMITY DETECTOR; IC用于接近探测器


型号：	AM313
厂家：	ANALOG MICROELECTRONICS
描述：	IC FOR PROXIMITY DETECTOR IC用于接近探测器
文件：	总4页 (文件大小：184K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

IC FOR PROXIMITY DETECTOR

AM 313

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

VCC

CABT

Power-On

Level

Voltage

Power-On

Delay

Short-Circuit

Detection

VREF

Reference

Output

Stages

Schmitt

Trigger

Oscillator

Hysteresis

Rectifier

Amplifier

Drive

Current

LED

GND

CGL

LED

Figure 1

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Analog Microelectronics GmbH

An der Fahrt 13, D – 55124 Mainz

Internet: www.analogmicro.de

Phone: +49 (0)6131/91 073 – 0

Fax: +49 (0)6131/91 073 – 30

E–Mail: info@analogmicro.de

IC FOR PROXIMITY DETECTOR

AM 313

ELECTRICAL SPECIFICATIONS

_amb= 25°C, V_CC= 4.75 to 35 V

Parameter

Symbol

I_CC

Conditions

Min.

Typ. Max. Unit

Supply Current

_CC= 4.75V, I_Rd= 0µA

_CC= 4.75V, I_Rd= 220µA

_CC= 35V, I_Rd= 0µA

_Cabt= 2V, V_CC= 35V

without external R_S

R_S= 5Ω

0.6

1.2

0.8

100

0.9

1.5

1.1

150

1.2

1.8

1.5

200

µA

Output Source Current

Output Sink Current

Max. Current

_QL(res. I_Q)

I_QL

_QL= f (R_S)

Low Output Voltage

High Output Voltage

LED Output Current

Short Circuit Detection Threshold U_m

Current Short Circuits

U_QL

U_Q(res. U_Q)

I_LED

_ext= 100 µA

_Cgl= 2V, V_CC= 4.75V

0.6

0.9

1.2

4.45

2.8

250

4.75

300

µA

350

150

–0.7

I_ON

I_OFF

_Cabt= 2V, V_Rm= 1V

_Cabt= 1V, V_Rm= 1V

–1.7

–1.2

TYPICAL PERFORMANCE CHARACTERISTICS

V_CC= 5V

Parameter

Symbol

T_ON

Conditions

Min.

Typ. Max. Unit

Scanning Duty Cycle

(in Short Circuit Mode)

_abt= 0nF, U_m= 1V

_abt= 1nF, U_m= 1V

_abt= 0nF, U_m= 1V

_abt= 1nF, U_m= 1V

_abt= 0nF

_abt= 1nF

_abt= 0nF

350

2.0

µs

T_OFF

T_OFF/T_ON

T_abt

100

380

2.3

Power–On–Delay

µs

_abt= 1nF

Oscillator Frequency

Oscillator Amplitude

Detection Frequency

Detection Distance Res.

Hysteresis Resistor

f_Osc

V_Osc

f_det

R_d

depends on LC res.

0.05

2.6

MHz

Vpp

kHz

kΩ

1.2

(f_Osc= 770kHz, Q = 16)

R_h

R_h>> R_d

kΩ

Det. Distance Temp. Comp. Res. R_k

Rectifier Filter Capacitor Cgl_ext

external

1.4

kΩ

depends on f_Osc

(Cgl_int= 150pF)

150

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IC FOR PROXIMITY DETECTOR

AM 313

ABSOLUTE MAXIMUM RATINGS

Supply Voltage V_CC

35V

Output Voltage U_Q

32V

Output Current I_QL

20mA

Junction Temperature T_J

Power Dissipation at T_amb= 25°C

Derate for T_amb> 25°C

Storage Temperature Range T_st

150°C

P_D= 600mW

1/R_Θ= 5mW/°C

– 55...125°C

Operating Temperature Range T_amb– 25...85°C (V_CC= 15V to 35V)

T_amb– 20...85°C (V_CC= 4.75V to 35V)

FUNCTIONAL DESCRIPTION

The proximity detection is based on the amplitude attenuation of an LC–oscillator which depends

on the distance to a metal object.

The signal from the oscillator is rectified and filtered, then detected by a Schmitt–Trigger which

switches the outputs Q (for close switch operation) and Q (for open switch operation).

An additional LED output shows the on-state of the detection. The LED is blanked in the case of

short circuit. To protect the circuit from overload, the outputs are disconnected and retested

periodically. The limitation of the output current is set by the resistor R_m.

The temperature compensation to adapt the oscillator voltage to different types of external LC

resonators is performed by connecting a resistor between pins 7 (VREF) and 2 (RK).

The circuit has a power–on–delay which is adjusted with CABT. Within this delay, the outputs Q

and Q are set to high level.

FUNCTIONAL DIAGRAMS

V_CC

R_m

VREF

LED

₁₄VCC

Z₂

R_K

¹⁰Q

AM313

D₁

R_H

Output

Z₁

D₂

C_OSC

R_D

R_S

Ground

Figure 2

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IC FOR PROXIMITY DETECTOR

AM 313

PINOUT

NAME

DESIGNATION

Resonator Input

Detection Distance Temp. Comp.

LED Driver

Rectifier Filter Capacitor

Power–On–Delay Adjust Cap.

Ground

Reference Voltage Output

Output Transistor Current Adjust

15 RH

LED

CGL

CABT

GND

VREF

LED

CGL

CABT

GND

VREF

VCC

13 NC

Output Q (open switch)

Output Q (closed switch)

Short Circuit Detection Input

Not Connected

Positive Supply Voltage

Hysteresis Adjust

VCC

Figure 1

Detection Distance Adjust

DELIVERY

The AM 313 is available in version:

• 16–pin–DIL packages (samples)

• SO 16 (n)–packages

• dice on 5“ blue foil

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