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參數資料
| 型號： | CS209A |
| 廠商： | ZF Electronics Corporation |
| 英文描述： | Proximity Detector |
| 中文描述： | 接近探測器 |
| 文件頁數： | 1/6頁 |
| 文件大小： | 166K |
| 代理商： | CS209A |
1
Features
OSC
Feedback
GND
V
CC
23.6k
W
4.8k
W
300
m
A
V
CC
OSC
RF
TANK
DEMOD
OUT
1
OUT
2
Neg Transient
Suppression
Oscillator
DEMOD
VBE/R Current
Regulator
COMP
+
-
D
VBE/R Current
Regulator
I
Separate Current
Regulator for Oscillator
Negative Transient
Suppression
Variable Low-Level
Feedback
Improved Performance
over Temperature
6mA Supply Current
Consumption at
V
CC
= 12V
Output Current Sink
Capability
20mA at 4V
CC
100mA at 24V
CC
I
I
I
I
I
Package Options
8L PDIP & SO
14L SO
C
Proximity Detector
Description
7
8
1
2
3
4
5
6
OSC
TANK
Gnd
OUT
1
RF
V
CC
DEMOD
OUT
2
10
7
14
13
12
8
1
2
3
4
5
6
11
9
OSC
TANK
Gnd
OUT
1
N.C.
OUT
2
N.C.
N.C.
RF
V
CC
N.C.
DEMOD
N.C.
N.C.
CS209A
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 (T
A
= 125C).............................................................200mW
Storage Temperature Range....................................................D55C to +165C
Junction Temperature...............................................................D40C to +150C
Electrostatic Discharge (except TANK pin)................................................2kV
Lead Temperature Soldering
Wave Solder(through hole styles only)...........10 sec. max, 260C peak
Reflow (SMD styles only)...........60 sec. max above 183C, 230C 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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