接近传感器芯片TDA0161.pdf

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TDA0161 PROXIMITY DETECTORS Minidip ORDERING NUMBER : TDA0161DP SO8 ORDERING NUMBER : TDA0161FP PIN CONNECTION (top view) . OUTPUT CURRENT : 10mA . OSCILLATOR FREQUENCY : 10 MHz . SUPPLY VOLTAGE : + 4 TO + 35 V DESCRIPTION These monolithic integrated circuits are designed for metallic body detection by detecting the vari- ations in high frequency Eddy current losses. With an external tuned circuit they act as oscillators. Output signal level is altered by an approaching metallic object. Output signal is determined by supply current changes. Independent of supply voltage, this cur- rent is high or low according to the presence or the absence of a close metallic object. SCHEMATIC DIAGRAM April 1993 1/6

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TYPICAL APPLICATIONS TDA0161 Detection Range (*) L1 (m H) C1 (pF) 2mm 5mm 10mm (*) Ingot steel target 30 300 2160 (1) (2) (3) 120 470 4700 COIL CHARACTERISTICS fosc (kHz) 2650 425 50 R1 (kW ) 6.8 27 27 C2 pF 47 470 3300 Core Coil Former Wire** Number of Turns 1 2 3 Cofelec 432 FP 9 x 5 SE 1/2 CAR 091 - 2 Cofelec 432 FP 14 x 8 SE 1/2 CAR 142 - 2 Cofelec 432 FP 26 x 16 SE 1/2 CAR 262 - 2 THOMSON Fils et Câbles Thomrex 14 (14/100mm) THOMSON Fils et Câbles Thomrex 14 (14/100mm) THOMSON Fils et Câbles Thomrex 14 (14/100mm) 40 100 200 ** The above results are obtained with single wire coil. When using Litz wire instead of single wire, the parallel resistance of the coil comes higher and the value of R1 may be increased, resulting in better sensitivity. be- 3/6

TDA0161 MINIDIP PACKAGE MECHANICAL DATA DIM. A a1 B b b1 D E e e3 e4 F I L Z mm TYP. 3.32 2.54 7.62 7.62 MIN. 0.51 1.15 0.356 0.204 7.95 3.18 MAX. MIN. 0.020 0.045 0.014 0.008 0.313 0.125 1.65 0.55 0.304 10.92 9.75 6.6 5.08 3.81 1.52 inch TYP. 0.131 0.100 0.300 0.300 MAX. 0.065 0.022 0.012 0.430 0.384 0.260 0.200 0.150 0.060 4/6

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