LA2000 Просмотр технического описания (PDF) - SANYO -> Panasonic

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LA2000

Audio Level Sensor

SANYO -> Panasonic 

LA2000

3. Time delays and obtaining CRs

When input signals that have been applied at a level not less than –45 dBm are removed, discharging occurs through the CR

connected at pin 2, lowering pin 2 potential. A time delay is provided before the hysteresis comparator turns over.

E1

t

E0 = − eτ

E0 : Initial voltage

E1 : Threshold voltage

τ : Time constant

Accordingly,

t = −τIn

E1

E0

E1/E0, within the IC, is 0.26. A desired time is obtained by an appropriate choice of τ (τ = C3R1). Therefore, the time delay is

obtained by the following formula:

t = 1.34 × C3R1 (sec)

We recommend 150 k to 500 kΩ for R when determining CR.

. 4. IC usage notes

Maximum ratings

When maximum ratings are surpassed, destruction or deterioration may result. Use the IC in the range where the maximum

. rating is not exceeded.

Interpin short circuits and reverse insertions

These cause destruction or deterioration of the IC: be careful when mounting on circuit board.

. Voltage applied to pin 8 should never exceed pin 9 voltage.

. The current flowing into pin 8 is to be 0.5 mA maximum.

. Pin 4 is unconnected, but is not to be used for GND or an interconnecting terminal.

I6 – Duty cycle

Ta = 60°C

or lower

Pd max – Ta

Duty cycle – %

Note: IC = 600 mA continuous is within 3 seconds

IC = 300 mA continuous is within 30 seconds

IC = 100 mA or less can be left on at all times.

Ambient temperature, Ta – °C

No.982-3/8

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