LA2010 查看數據表（PDF） - SANYO -> Panasonic

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LA2010

Audio Level Sensor

SANYO -> Panasonic 

LA2010

Recommended Operating Conditions at Ta = 25˚C

Parameter

Recommended supply voltage

Operating voltage range

Symbol

VCC

VCC op

Conditions

Operating Characteristics at Ta = 25˚C, VCC=9.0V, f=1kHz

Parameter

Symbol

Conditions

Circuit current

Output transistor saturation voltage

Output diode forward voltage

Input check kevel

Comparator (1) ON level

Comparator (1) OFF level

Comparator (2) ON level

Comparator (2) OFF level

Pin 4 reset level

Pin 8 reset voltage-1

Pin 8 reset voltage-2

ICC

VCE(Sat)

VF

VIN

VTH1-H

VTH1-L

VTH2-H

VTH2-L

V4R

V8R-1

V8R-2

f=1kHz, VIN=–30dB

I6=600mA

IF=600mA

f=1kHz, Pin 6 L → H

Pin 6 inverted

Pin 6 inverted

Pin 6 inverted

Pin 6 inverted

f=1kHz, VIN=–30dB, pin 8=1.0V

Pin 1 inverted, Rg=0

f=1kHz, VIN=–30dB, pin 4 inverted

Ratings

Unit

9V

3.5 to 14 V

Ratings

Unit

min typ max

11

22 mA

1.1

1.6 V

1.5

2.0 V

–47 –50 –53 dB

3.0

3.5

4.0 V

1.8

2.2

2.6 V

4.7

5.5

6.3 V

3.6

4.0

4.6 V

0.02

0.1 V

0.6

0.7

0.8 V

1.1

1.3

1.5 V

1. Description of external parts

· C1 : Input coupling capacitor

Capacitor used for coupling with preceding preamp. Characteristics at the time of application of power

considered, the capacitance value of C1 must not exceed that of C3 on pin 3. 0.047µF (polyester film

capacitor) is recommended. R1, R2 are used to adjust the input level. Pin 1 is high in input imedance ; in

order to be free from external effect, R2 must not exceed 10kΩ and must be grounded.

· C2, R3 : For setting interprogram space detect time (TD)

By selecting proper C2 and R3, your desired TD can be obtained.

TD=1.34×C2 · R3 (s)

It is recommended to use R3 of 150kΩ to 500kΩ.

It is recommended to use C2 of 0.22µF (polyester film capacitor).

· C3 :

NF capacitor

Lower cut-off frequency fL depends on this capacitor.

fL=

1

0.3πC3

(µF)

......... (kHz)

Assuming C3=0.47µF, fL=2.2kHz is obtained. If the capacitance

value of C3 is increased, fL lowers, thereby being subjected to

the effect of the variations in preamp. Further, since the time that

elapses between the moment VCC is applied and the moment the

circuit is stabilized becomes longer, the reset time must be made

longer accordingly. Therefore, it is recommended to use C3 of

0.47µF.

· C4, R4 : For setting recorded area detect time (TS)

The presence or absence of a program (input signal) is checked by the time setting determined by C4,

R4 as follows :

· For recorded area TS < TI + TD

· For unrecorded area TS > TI + TD

The recorded area detect time is set by :

TS=C4 (µF) R4 (kΩ) (ms)

Therefore, if the recorded area detect time (TS) is longer than the

input signal time (TI) + the unrecorded area detect time (TD), no

program is present. The resistance value of R4 must be 50kΩ to

200kΩ ; it is recommended to use R4 of 100kΩ. The capacitance

value of C4 must not exceed 4.7µF ; it is recommended to use C4

of 1µF to 3.3µF.

No.1343–2/8

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