TDA0161FP ,PROXIMITY DETECTORSTDA0161PROXIMITY DETECTORS.OUTPUT CURRENT : 10mA.OSCILLATOR FREQUENCY : 10 MHz.SUPPLY VOLTAGE : + 4 ..
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TDA0161DP-TDA0161FP
PROXIMITY DETECTORS
TDA0161PROXIMITY DETECTORS OUTPUT CURRENT: 10mA. OSCILLATOR FREQUENCY:10 MHz. SUPPLY VOLTAGE:+4 TO+35V
Minidip
ORDERING NUMBER: TDA0161DP
SO8
ORDERING NUMBER: TDA0161FP
DESCRIPTIONThese monolithic integrated circuits are designed
for metallic body detectionby detecting the vari-
ationsin high frequencyEddy current losses. With external tuned circuit they act as oscillators.
Output signal levelis alteredby an approaching
metallic object.
Output signalis determined by supply current
changes. Independentof supply voltage, this cur-
rentis highor low accordingto the presenceor the
absenceofa close metallic object.
PIN CONNECTION (topview)
SCHEMATIC DIAGRAM
ELECTRICAL CHARACTERISTICSTDA0161DP -40o C< Tamb< +100oC
TDA0161FP -40o C< Tamb< +100oC
Ptot< 150mW,unless otherwise specified
Symbol Parameter Min. Typ. Max. UnitVCC Supply Voltage 4 35 V
Reverse VoltageLimitation (ICC= -100 mA) TDA0161 1 V
ICC Supply Current,Close Target (Tamb= +25oC)
+4V< VCC< +35V TDA0161 8 10 12
ICC Supply Current,Remote Target
+4V< VCC< +35V TDA0161 1
Supply Current Transition Time=0≠0
(100xC3 (nF))
fosc Oscillator Tuning Frequency 10 MHz Output Frequency (C3=0) 0 10 kHz
ΔICC Output Current Ripple-C3=0,C2 (pF)> 150/fosc (MHz) 20 μA Negative Resistanceon TerminalsA andE
4kΩ
Hyst Hysteresisat Detection PointC2 (Pf)> 150/fosc (MHz) 0.5 5 %Ifthe circuitis usedata frequency higher than 3MHz,itis recommendedto connecta capacitorof 100pF between terminalsEandD.
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
VCC Supply Voltage 35 V Junction Temperature +150 oC
Tstg Storage Temperature Range –55to +150 oC
OPERATING MODE
Between terminalsA andE, the integrated circuit
acts like anegative resistance equaltotheexternal
resistor R1 connected between terminalsB andH.
The oscillation stops when loss resistance Rpof
tuned circuit becomes smaller than R1. Then, the
supply current willbe ICC= 10mA (pinsG and D).
The oscillationsustains when loss resistance Rpof
tuned circuit becomes higher than R1. Then, the
supply current willbe ICC 1mA(pinsG and D).
Eddy currentsinducedby coilL1 ina metallic body,
determine loss resistance Rp.
TDA0161
TYPICAL APPLICATIONS
Detection Range(*) L1 (μH) C1 (pF) fosc
(kHz)
(kΩ)
2mm 30 (1) 120 2650 6.8 47
5mm 300 (2) 470 425 27 470
10mm 2160 (3) 4700 50 27 3300
(*) Ingot steel target
COIL CHARACTERISTICS
Core Coil Former Wire** Numberof Turns Cofelec
432FP9x5SE
1/2
CAR 091-2
THOMSON Filset Câbles
Thomrex14
(14/100mm) Cofelec
432FP14x8SE
1/2
CAR 142-2
THOMSON Filset Câbles
Thomrex14
(14/100mm)
100 Cofelec
432FP26x16SE
1/2
CAR 262-2
THOMSON Filset Câbles
Thomrex14
(14/100mm)
200 The above resultsare obtained with single wire coil.When usingLitz wireinsteadof single wire,the parallel resistanceof thecoil be-
comes higherandthe valueofR1 maybe increased,resultingin better sensitivity.
TDA0161
MINIDIP PACKAGE MECHANICAL DATA
DIM. mm inch
MIN. TYP. MAX. MIN. TYP. MAX. 3.32 0.131 0.51 0.020 1.15 1.65 0.045 0.065 0.356 0.55 0.014 0.022 0.204 0.304 0.008 0.012 10.92 0.430 7.95 9.75 0.313 0.384 2.54 0.100 7.62 0.300 7.62 0.300 6.6 0.260 5.08 0.200 3.18 3.81 0.125 0.150 1.52 0.060
TDA0161
SO8 PACKAGE MECHANICAL DATA
DIM. mm inch
MIN. TYP. MAX. MIN. TYP. MAX. 1.75 0.069 0.1 0.25 0.004 0.010 1.65 0.065 0.65 0.85 0.026 0.033 0.35 0.48 0.014 0.019 0.19 0.25 0.007 0.010 0.25 0.5 0.010 0.020 45° (typ.) 4.8 5.0 0.189 0.197 5.8 6.2 0.228 0.244 1.27 0.050 3.81 0.150 3.8 4.0 0.15 0.157 0.4 1.27 0.016 0.050 0.6 0.024
S8° (max.)
TDA0161
Information furnishedis believedtobe accurateand reliable. However, SGS-THOMSON Microelectronics assumesno responsibilityforthe
consequencesofuseof such informationnorfor any infringementof patentsor other rightsof thirdparties which may result fromits use.No
licenseis granted byimplicationor otherwise underany patentorpatent rightsofSGS-THOMSON Microelectronics. Specifications mentioned this publication are subjectto change without notice. This publication supersedes and replacesall information previously supplied.
SGS-THOMSONMicroelectronics productsarenot authorizedforuseas critical componentsinlife support devicesorsystems withoutexpress
written approvalof SGS-THOMSON Microelectronics. 1994 SGS-THOMSONMicroelectronics- AllRights Reserved
TDA0161
