TDE0160
Proximity Detectors
Features
■
■
■
■
■
Supply Voltage +4 to +36V
Supply Current < 1.2mA
Loss Resistance 5 to 50kΩ
Oscillator Frequency < 1MHz
Output Transistors I = 20mA, V
CE(sat)
≤
1.1V
SO14
Description
The TDE0160 is designed to detect metal bodies
by the effect of Eddy currents on the HF losses of
a coil. It has two complementary open collector
outputs with peak limiting. Hysteresis is
adjustable, and an electronic switching circuit is
incorporated for disabling both outputs.
An internal zener diode maintains the supply
voltage to the circuit in “dipole“ operation.
Schematic Diagram
November 2005
Rev 2
1/18
www.st.com
18
TDE0160
Contents
1
2
Internal schematic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Electrical ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.1
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3
4
5
6
Operating Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Typical Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Package Mechanical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2/18
TDE0160
1 Internal schematic diagram
1
Figure 1.
Internal schematic diagram
Pin connection diagram (top view)
3/18
2 Electrical ratings
TDE0160
2
Electrical ratings
Table 1.
Symbol
V
CC
V
O
I
O
(I
1
- I
3
)
I
Z
T
J
T
oper
T
stg
Supply Voltage
Output Voltage
(1)
Output Current (I
1
- I
3
)
Zener Current
Junction Temperature
Ambient Temperature Range
Storage Temperature Range
Absolute maximum ratings
Parameter
Value
36
36
40
40
+150
–25 to 85
–65 to 150
Unit
V
V
mA
mA
°C
°C
°C
1. Internal peak limiting to protect against transient voltage surges.
2.1
Electrical characteristics
T
amb
= +25°C, unless otherwise specified.
Table 2.
Symbol
V
CC
V
Z
I
CC
V
LIM
V
SAT
I
LEAK
V
TH
R
n
HYST
P
HYST
f
OSC
F
SW
T
D
T
RE
Electrical Characteristcs
Parameter
Supply Voltage
Zener Voltage
Supply Current
Limiting
Output Transistor
Saturation Voltage
Output Transistor
Leakage Current
Switching Threshold
Negative Resistance
(2)
5kΩ < R
H
< 50kΩ,
f = 100kHz, R
S
= 0
Inherent Hysteresis
Programmed
Hysteresis
Oscillation Frequency
Switching Frequency
Switching Time-delay
Switching Response
Time
C
d
= 10nF, V
CC
= +20V
(with matched oscillator
circuit)
750
0.5C
d
(µF)
10
Test conditions
Pin
11
Min.
4
3
Typ.
Max.
36
4
1.2
Unit
V
V
mA
V
I
Z
= 20mA
I = 0.1mA
I
1
or I
3
= +20mA
V = +30V
9 - 11
11
1 or 3
1 or 3
1 or 3
12
42
0.9
1.1
2
90
110
R
n
= R
H
1
R
s
R
s
+ R
H
1
2
130
V
µA
mV
R
2
= 0
H < 15%
%
%
MHz
Hz
s
µs
Note:
4/18
2. See Characteristics Curves
TDE0160
3 Operating Mode
3
Operating Mode
If I
C
exceeds I
CO
= V
(ref)
/ R
d
the switch cuts off the output transistor and tests the value of
current I
C,
with time costant 0.5C
d
On power up the internal start system cuts off the output
transistors until V
CC
reaches a value permitting normal operation of the circuit.
Figure 2.
Switching Operation
5/18
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