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L4620

ELECTRICAL CHARACTERISTICS

(T

amb

= 25

擄C,

unless otherwise specified. Refer to block diagram

for external component values)

Symbol

V

Z

I

S

f

osc

V

7

, V

8

I

7

, I

8

V

2

Parameter

Internal Zener Voltage (pin 5)

Supply Current (pin 5)

Oscillator Frequency (pin 1)

Programming Pins Input

Voltage (pin 7, 8)

Test Conditions

I

S

= 24 mA

V

S

= 3.8 V

R

osc

= 180 k鈩? C

osc

= 4.7 nF

Low State

High state

2

鈥?

150

0.4

V

Z

鈥?

鈥?

V

2

= High

V

pin 3

< V

SENSL

V

2

= High

V

pin 3

> V

SENSH

鈥?100

碌

A < I

sens

< 100

碌

A

V

2

= Low

V

2

= High

I

3

= 鈥?100

碌A(chǔ)

I

3

= + 100

碌

A

I

sens

T

d

Sensor Input Bias Current (pin

3)

Delay Time

V

sens

= High

f

osc

= 1.6 kHz

V

7

= Low

V

7

= High

V

out(sat)

V

out(clamp)

I

LEAK

Output Stage Saturation

Voltage (pin 6) (**)

Output Stage Overvoltage

Protection (pin 6)

Leak Current (pin 6)

I

out

= 200 mA

I

out

= 70 mA

P6 = 15V; P7 = P8 = GND

1

32

1

**) The output squarewave signal frequency is given by f =

fosc.

512

The duty cycle depends on the state of the pin 8 and can be or 1 : 2 or 1 : 64, i.e. refer to figure 2, T = 320 ms, t = 160 or 5 ms when

the oscillator frequency f

osc

= 1.6 KHz.

f

osc

.

Min.

4

1.45

Typ.

4.5

6.5

1.6

Max.

5

11

1.75

0.3

Unit

V

mA

kHz

V

V

碌A(chǔ)

碌A(chǔ)

V

V

mA

Programming Pins Input Current V

7

= V

8

= 0 V

(pin 7, 8)

V

7

= V

8

= V

Z

Sensor Drive Output Voltage, (*) V

2

= Low,

I

2

= 1 mA

V

2

= High,

I

2

= 1 mA

V

Z

鈥?.4

1

0.4

0.22

0.47

0.29

I

2

V

SENSH

/V

2

V

sens

_____

V

2

V

clamp3L

V

clamp3H

Sensor Driver Output Current

Sensor Input High Threshold

Voltage Versus V

2

(pin 3)

Sensor Input Low Threshold

Voltage Versus V

2

(pin 3)

Sensor Input Clamping Voltage

(pin 3)

0.33

0.15

鈥?0.1

鈥?0.8

V

Z

鈥?0.6

0.1

鈥?0.4

V

Z

+0.8

1.2

10.24

20.48

1.3

V

V

V

碌A(chǔ)

sec

sec

V

V

碌

A

19

21

23

100

*) This is a squarewave signal. The frequency is given by : f =

4/9

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