Metal body proximity detector based on the TDA0161

STEVAL-IFS005V1
Metal body proximity detector based on the TDA0161
Data Brief
Features
■
10 mA output current
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Supply voltage +4 V to +35 V
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Oscillator frequency 10 MHz
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Description
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This evaluation board is based on the TDA0161, a
monolithic integrated circuit designed for metallic
body detection by sensing variations in high
frequency eddy current losses. Using an
externally-tuned circuit, device acts as an
oscillator. The output signal level is altered by an
approaching metallic object.
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The output signal is determined by supply current
changes. Independent of the supply voltage, this
current is high or low, depending on the proximity
of a metallic object.
STEVAL-IFS005V1
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April 2008
Rev 1
For further information contact your local STMicroelectronics sales office.
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Bill of material and electrical schematic
STEVAL-IFS005V1
1
Bill of material and electrical schematic
1.1
Bill of material
Table 1.
BOM list
Component
Value
C1
470pF
SMD capacitor 1206 size
C2
470 pF
SMD capacitor 1206 size
C3
1nF LV
SMD capacitor 1206 size
C4
0.1ìF 50V
SMD capacitor 1206 size
C5
1ìF 50V
SMD capacitor 1206 size
DL1
LED diode
LED diode 0805 size
IC1
TDA0161
TDA0161FP SO-8 package
L1
330µH
EPCOS B82462-A4334K (1)
M1
Screw plug 3 position
Sub miniaturization plug
Q1
MMBT3904
NPN transistor in SOT-23
R1
18kΩ
R2
120Ω
R3
560Ω
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R4
2.2kΩ
Description
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SMD resistor 1206 size
SMD resistor 1206 size
SMD resistor 1206 size
SMD resistor 1206 size
1. This component must be assembled on an external support PCB
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STEVAL-IFS005V1
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Bill of material and electrical schematic
Electrical schematics
Figure 1.
Schematic
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Figure 2.
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Top overlay (not to scale)
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Figure 3.
Bottom overlay (not to scale)
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Revision history
2
STEVAL-IFS005V1
Revision history
Table 2.
Document revision history
Date
Revision
02-Apr-2008
1
Changes
Initial release
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