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CS209AYDR14 Scheda tecnica(PDF) 1 Page - Cherry Semiconductor Corporation

Il numero della parte CS209AYDR14
Spiegazioni elettronici  Proximity Detector
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Produttore elettronici  CHERRY [Cherry Semiconductor Corporation]
Homepage  http://www.cherrycorp.com/
Logo CHERRY - Cherry Semiconductor Corporation

CS209AYDR14 Scheda tecnica(HTML) 1 Page - Cherry Semiconductor Corporation

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1
Features
OSC
Feedback
GND
VCC
23.6k
W
4.8k
W
300
mA
VCC
OSC
RF
TANK
DEMOD
OUT1
OUT2
Neg Transient
Suppression
Oscillator
DEMOD
VBE/R Current
Regulator
COMP
+
-
DVBE/R Current
Regulator
s
Separate Current
Regulator for Oscillator
s
Negative Transient
Suppression
s
Variable Low-Level
Feedback
s
Improved Performance
over Temperature
s
6mA Supply Current
Consumption at
VCC = 12V
s
Output Current Sink
Capability
20mA at 4VCC
100mA at 24VCC
Package Options
8L PDIP & SO
14L SO
Proximity Detector
7
8
1
2
3
4
5
6
OSC
TANK
Gnd
OUT1
RF
VCC
DEMOD
OUT2
10
7
14
13
12
8
1
2
3
4
5
6
11
9
OSC
TANK
Gnd
OUT1
N.C.
OUT2
N.C.
N.C.
RF
VCC
N.C.
DEMOD
N.C.
N.C.
CS209A
Description
The CS209A is a bipolar monolithic
integrated circuit for use in metal detec-
tion/proximity sensing applications.
The IC (see block diagram) contains two
on-chip current regulators, oscillator
and low-level feedback circuitry, peak
detection/demodulation circuit, a com-
parator and two complementary output
stages.
The oscillator, along with an external
LC network, provides controlled oscilla-
tions where amplitude is highly depen-
dent on the Q of the LC tank. During
low Q conditions, a variable low-level
feedback circuit provides drive to main-
tain oscillation. The peak demodulator
senses the negative portion of the oscil-
lator envelop and provides a demodu-
lated waveform as input to the com-
parator. The comparator sets the states
of the complementary outputs by com-
paring the input from the demodulator
to an internal reference. External loads
are required for the output pins.
A transient suppression circuit is
included to absorb negative transients
at the tank circuit terminal.
Block Diagram
Absolute Maximum Ratings
Supply Voltage ................................................................................................24V
Power Dissipation (TA = 125¡C).............................................................200mW
Storage Temperature Range ....................................................Ð55¡C to +165¡C
Junction Temperature...............................................................Ð40¡C to +150¡C
Electrostatic Discharge (except TANK pin) ................................................2kV
Lead Temperature Soldering
Wave Solder(through hole styles only) ...........10 sec. max, 260¡C peak
Reflow (SMD styles only) ...........60 sec. max above 183¡C, 230¡C peak
A
Company
¨
Rev. 3/11/99
Cherry Semiconductor Corporation
2000 South County Trail, East Greenwich, RI 02818
Tel: (401)885-3600 Fax: (401)885-5786
Email: info@cherry-semi.com
Web Site: www.cherry-semi.com


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