CS209A

http://onsemi.com

3

Characteristic

Test Conditions

Min

Typ

Max

Unit

−

−

−

3.5

6.0

11.0

6.0

11.6

20

mA

mA

mA

TANK Current

−550

−300

−100

μA

Demodulator Charge Current

−60

−30

−10

μA

Output Leakage Current

−

0.01

10

μA

−

−

60

200

200

500

mV

mV

Oscillator Bias

1.1

1.9

2.5

V

Feedback Bias

1.1

1.9

2.5

V

OSC − RF Bias

−250

100

550

mV

Protect Voltage

−10

−8.9

−7.0

V

Detect Threshold

−

720

1440

1950

mV

Release Threshold

−

550

1200

1700

mV

PACKAGE PIN DESCRIPTION

PACKAGE PIN #

PIN SYMBOL

FUNCTION

DIP−8 & SO−8SO−14

1

1

OSC

Adjustable feedback resistor connected between OSC and RF sets detection range.

2

2

TANK

Connects to parallel tank circuit.

3

3

GND

Ground connection.

4

4

OUT1

Complementary open collector output; when OUT1 = LOW, metal is present.

5

6

OUT2

Complementary open collector output; when OUT2 = HIGH, metal is present.

6

10

DEMOD

Input to comparator controlling OUT1 and OUT2.

7

12

Supply voltage.

8

13

RF

Adjustable feedback resistor connected between OSC and RF set detection range.

−

5, 7, 8, 9, 11, 14

NC

No connection.