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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 MARKING DIAGRAMS
CS209A AWL YYWW 1 8 SO−8 D SUFFIX CASE 751 1 14 14 1 SO−14 D SUFFIX CASE 751A 1 A WL, L YY, Y WW, W = Assembly Location = Wafer Lot = Year = Work Week CS209A AWLYWW 209A ALYWX
8 DIP−8 N SUFFIX CASE 626 8 1
8 1
ORDERING INFORMATION
Device CS209AYN8 CS209AYD8 CS209AYDR8 CS209AYD14 CS209AYDR14 Package DIP−8 SO−8 SO−8 SO−14 SO−14 Shipping 50 Units/Rail 95 Units/Rail 2500 Tape & Reel 55 Units/Rail 2500 Tape & Reel
© Semiconductor Components Industries, LLC, 2006
July, 2006 − Rev. 3
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Publication Order Number: CS209A/D
CS209A
PIN CONNECTIONS
DIP−8 and SO−8 OSC TANK GND OUT1 1 8 RF VCC DEMOD OUT2 OSC TANK GND OUT1 NC OUT2 NC 1 SO−14 14 NC RF VCC NC DEMOD NC NC
ΔVBE/R Current Regulator
300 μA
VBE/R Current Regulator
VCC
Oscillator OSC OSC Feedback RF VCC OUT2 4.8 kΩ 23.6 kΩ OUT1
Neg Transient Suppression
+ DEMOD COMP −
TANK
GND
DEMOD
Figure 1. Block Diagram
ABSOLUTE MAXIMUM RATINGS*
Rating Supply Voltage Power Dissipation (TA = 125°C) Storage Temperature Range Junction Temperature Range Electrostatic Discharge (except TANK pin) Lead Temperature Soldering: Wave Solder (through hole styles only) (Note 1) Reflow (SMD style only) (Note 2) Value 24 200 −55 to +165 −40 to +150 2.0 260 peak 230 peak Unit V mW °C °C kV °C °C
1. 10 second maximum. 2. 60 second maximum above 183°C. *The maximum package power dissipation must be observed.
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CS209A
ELECTRICAL CHARACTERISTICS: (−40°C ≤ TA ≤ +125°C, unless otherwise specified.)
Characteristic Supply Current ICC VCC = 4.0 V VCC = 12 V VCC = 24 V VCC = 20 V VCC = 20 V VCC = 24 V VCC = 4.0 V, IS = 20 mA VCC = 24 V, IS = 100 mA VCC = 20 V VCC = 20 V VCC = 20 V ITANK = .