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CS209AYDR14 Scheda tecnica(PDF) 1 Page - Cherry Semiconductor Corporation |
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CS209AYDR14 Scheda tecnica(HTML) 1 Page - Cherry Semiconductor Corporation |
1 / 6 page 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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