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PDF CS209A Data sheet ( Hoja de datos )
| Número de pieza | CS209A | |
| Descripción | Proximity Detector | |
| Fabricantes | Cherry Semiconductor | |
| Logotipo |  |
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CS209A
Proximity Detector
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.
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
Block Diagram
OSC
RF
DVBE/R Current
Regulator
300mA
Oscillator
OSC
Feedback
4.8kW 23.6kW
Neg Transient
Suppression
DEMOD
VCC
VBE/R Current
Regulator
+
COMP
-
VCC
OUT1
OUT2
Features
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
14L SO
OSC 1
TANK 2
Gnd 3
OUT1 4
N.C. 5
OUT2 6
N.C. 7
14 N.C.
13 RF
12 VCC
11 N.C.
10 DEMOD
9 N.C.
8 N.C.
8L PDIP & SO
OSC 1
TANK 2
Gnd 3
OUT1 4
8 RF
7 VCC
6 DEMOD
5 OUT2
TANK
GND
Rev. 3/11/99
DEMOD
1
Cherry Semiconductor Corporation
2000 South County Trail, East Greenwich, RI 02818
Tel: (401)885-3600 Fax: (401)885-5786
Email: [email protected]
Web Site: www.cherry-semi.com
A ¨ Company
Free Datasheet http://www.0PDF.com
1 page  
Test and Application Diagram
20kW
OSC
RF
TANK
Gnd
4300pF
L
CS209A
VCC
RL RL
1kW 1kW
OUT1
NORMALLY
HI
DEMOD
CDEMOD
2200 pF
OUT2
NORMALLY
LO
L: Core: Siemens B65531-D-R-33
52 Turns, 6x44 AWG, Litz Unserved
Single Polyurethane
5
Free Datasheet http://www.0PDF.com
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet CS209A.PDF ] | |
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