Operating Conditions at Ta = 25°C

Parameter

Symbol

Conditions

Ratings

Unit

Operating voltage range

3.5 to 14

V

Parameter

Symbol

Conditions

min

typ

max

Unit

Circuit current

6

12

mA

Output transistor saturating

voltage

1.5

2.5

V

Output diode forward voltage

1.5

2.0

V

Output-off level in input

equivalent

f = 1 kHz

–43

–50

–54

dBm

Comparator-on level

3.0

3.5

4.0

V

Comparator-off level

1.8

2.2

2.6

V

Pin 8 high level

0.45

0.55

V

Output transistor leakage

current

100

µA

Output diode leakage current

100

µA

1.

Description of external parts

C1

Input coupling capacitor

0.47 to 2.2 µF recommended.

C2

NF capacitor

Capacitance is reduced, so the off level in input equivalent becomes lower in

the bass frequency range. We recommend 1 to 10 µF.

C3, R1

For designation of time delays

Any time delay can be obtained by adequate choice of C3 and R1. We

recommend 150 k to 500 k

Ω for R1.

C4, R3

Power supply ripple filter

R2

Bias resistor

For diode when pin 8 is used to drive external transistors. A 1 k

Ω resistor is

recommended.

2.

Individual pins and their operations

.

Pin 6 is for driving plungers, When it is on the ‘‘L’’ side, pin 6 turns on and can draw current up to 600 mA maximum

(restricted by duty-cycle chart). It is not to be on continuously for more than 3 seconds.

.

Pin 7 is a diode that prevents reverse voltages induced when the plunger is turned off from on.

.

Pin 8 functions in phase with pin 6 and can drive external transistors (such as for MUTE ).

LA2000

No.982-2/8