LA2010 View Datasheet(PDF) - SANYO -> Panasonic

Part Name

Description

Manufacturer

LA2010

Audio Level Sensor

SANYO -> Panasonic 

LA2010

· C5 : For setting reset time

Capacitor used to set the time for initializing the circuit at the time of application of power. The reset

pulse is generated for a certain period of time [TR=14.4 · C5 (µF) (ms) ] that is set each time power is

applied.

· C6, R5 : For power ripple filter.

Description of Operatin (See Timing Chart.)

When power is applied, the reset circuit operates to initialize the circuit. The reset time depends on the capacitance

value of C5 on pin 8 and no input signal is accepted while the reset circuit is operating. When the reset mode is

released and the input signal exceeds the input check level, C, R on pin 2 are charged and the pontential on pin 2

rises, thereby causing the comparator (1) to be inverted. When the comparator (1) is inverted, pin 4 (C4) is charged

and the potential on pin 4 begins rising. When this potential exceeds the threshold voltage, the comparator (2) is

inverted and the program presence mode is memorized ; thus the potential on pin 4 is held at High level. During

this period of time, the output (pin 6) is held at High level. When the signal disappears and the comparator (1) is

inverted, the output (pin 6) turns to Low level, thereby causing the plunger to be driven.

The reset pulse is generated for a certain period of time each time power is applied, thereby causing the circuit to

be initialized.

Timing Chart

Proper Cares in Using IC

· Maximum Ratings

If the maximum ratings are exceeded, breakdown or deteroration may result. Use the IC in the range where the

maximum ratings are not exceeded.

· Pin-to-pin Short and Inverted Insertion

These may cause breakdown or deterioration to occur. Be extremely careful when mounting the IC on the board.

· The voltage on pin 1 must not exceed that on pin 9.

· The current flowing into pin 2 and pin 4 must not exceed ±0.5mA continuously.

· The voltage on pin 8 is 2.5V max. and must not exceed that on pin 7.

· Electrolytic capacitors are used to set the recorded area detect time and reset time. The actual time constants are

15 to 20% larger than the calculated values obtained by using the catalon values of such capacitors. For polyester

film capacitor and tantalum electrolytic capacitor, the calculated values hold to a fairly good approximation.

No.1343–3/8

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