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CS209A Datasheet PDF : 8 Pages
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CS209A
Proximity Detector
The CS209A is a bipolar monolithic integrated circuit for use in
metal detection/proximity sensing applications. The IC (see Figure 1)
contains two on−chip current regulators, oscillator and low−level
feedback circuitry, peak detection/demodulation circuit, a comparator
and two complementary output stages.
The oscillator, along with an external LC network, provides
controlled oscillations where amplitude is highly dependent on the Q
of the LC tank. During low Q conditions, a variable low−level
feedback circuit provides drive to maintain oscillation. The peak
demodulator senses the negative portion of the oscillator envelope and
provides a demodulated waveform as input to the comparator. The
comparator sets the states of the complementary outputs by comparing
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.
Features
• Separate Current Regulator for Oscillator
• Negative Transient Suppression
• Variable Low−Level Feedback
• Improved Performance Over Temperature
• 6.0 mA Supply Current Consumption at VCC = 12 V
• Output Current Sink Capability
− 20 mA at 4.0 VCC
− 100 mA at 24 VCC
http://onsemi.com
8
1
8
1
14
1
DIP−8
N SUFFIX
CASE 626
MARKING
DIAGRAMS
8
CS209A
AWL
YYWW
SO−8
D SUFFIX
CASE 751
1
8
209A
ALYWX
SO−14
D SUFFIX
CASE 751A
1
14
CS209A
AWLYWW
1
A
= Assembly Location
WL, L = Wafer Lot
YY, Y = Year
WW, W = Work Week
ORDERING INFORMATION
Device
Package
Shipping
CS209AYN8
DIP−8
50 Units/Rail
CS209AYD8
SO−8
95 Units/Rail
CS209AYDR8
SO−8
2500 Tape & Reel
CS209AYD14
SO−14
55 Units/Rail
CS209AYDR14 SO−14
2500 Tape & Reel
© Semiconductor Components Industries, LLC, 2006
1
July, 2006 − Rev. 3
Publication Order Number:
CS209A/D
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