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| IC FOR PROXIMITY DETECTOR GENERAL DESCRIPTION AM 313 The AM 313 is a bipolar monolithic Integrated Circuit designed for proximity detection applications. 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 100A 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 14 Power-On Level 5 VREF RK LC RD RH 7 2 1 16 15 Hysteresis Oscillator Voltage Reference Power-On Delay Short-Circuit Detection 11 10 9 8 RM Q Q RS Rectifier Schmitt Trigger Amplifier Output Stages Drive Current LED 4 Figure 1 CGL 3 LED 6 GND analog microelectronics 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 April 2005 1/4 IC FOR PROXIMITY DETECTOR ELECTRICAL SPECIFICATIONS Tamb = 25C, VCC = 4.75 to 35 V Parameter Supply Current Symbol ICC Conditions VCC = 4.75V, IRd = 0A VCC = 4.75V, IRd = 220A VCC = 35V, IRd = 0A Output Source Current Output Sink Current Max. Current Low Output Voltage High Output Voltage LED Output Current Current Short Circuits IQL (res. IQ) IQL IQL = f (RS) UQL UQ (res. UQ) ILED ION IOFF VCabt = 2V, VRm = 1V VCabt = 1V, VRm = 1V VCabt = 2V, VCC = 35V without external RS RS = 5 Iext = 100 A VCgl = 2V, VCC = 4.75V Min. 0.6 1.2 0.8 100 100 12 0.6 4.45 2.8 250 50 -1.7 4 300 80 -1.2 Typ. 0.9 1.5 1.1 150 150 18 0.9 AM 313 Max. 1.2 1.8 1.5 200 200 1.2 4.75 350 150 -0.7 Unit mA mA mA A A mA V V mA mV A A Short Circuit Detection Threshold Um TYPICAL PERFORMANCE CHARACTERISTICS VCC = 5V Parameter Scanning Duty Cycle (in Short Circuit Mode) TOFF TOFF /TON Power-On-Delay Oscillator Frequency Oscillator Amplitude Detection Frequency Detection Distance Res. Hysteresis Resistor Det. Distance Temp. Comp. Res. Rectifier Filter Capacitor Tabt fOsc VOsc fdet Rd Rh Rk Cglext Rh >> Rd external depends on fOsc (Cglint = 150pF) 0 0 150 (fOsc = 770kHz, Q = 16) 3 30 1.4 Symbol TON Conditions Cabt = 0nF, Um = 1V Cabt = 1nF, Um = 1V Cabt = 0nF, Um = 1V Cabt = 1nF, Um = 1V Cabt = 0nF Cabt = 1nF Cabt = 0nF Cabt = 1nF depends on LC res. 0.05 1.2 5 Min. Typ. 4 21 350 2.0 90 100 380 2.3 2.6 2 s ms MHz Vpp kHz k k k pF Max. Unit s s s ms analog microelectronics April 2005 2/4 IC FOR PROXIMITY DETECTOR ABSOLUTE MAXIMUM RATINGS Supply Voltage VCC Output Voltage UQ Output Current IQL Junction Temperature TJ Power Dissipation at Tamb = 25C Derate for Tamb > 25C Storage Temperature Range Tst Operating Temperature Range Tamb Tamb 35V 32V 20mA 150C PD = 600mW 1/R = 5mW/C - 55...125C - 25...85C (VCC = 15V to 35V) - 20...85C (VCC = 4.75V to 35V) AM 313 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 Rm. 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 VCC VREF 7 14 VCC 3 LED 11 Rm Z2 10 9 RK 2 1 AM313 RH 15 Q Q T D1 Output Z1 C R Ground L 16 COSC RD 6 5 4 8 RS D2 Figure 2 analog microelectronics April 2005 3/4 IC FOR PROXIMITY DETECTOR PINOUT PIN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 NAME LC RK LED CGL CABT GND VREF RS Q AM 313 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 Output Q (open switch) Output Q (closed switch) Short Circuit Detection Input Not Connected Not Connected Positive Supply Voltage Hysteresis Adjust Detection Distance Adjust LC RK LED CGL CABT GND VREF RS 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 RD RH VCC NC NC RM Q Q Q RM NC NC VCC RH RD Figure 1 DELIVERY The AM 313 is available in version: * 16-pin-DIL packages (samples) * SO 16 (n)-packages * dice on 5" blue foil analog microelectronics April 2005 4/4 |
Price & Availability of AM313
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