Sanyo LA2010 Specifications

Any and all SANYO products described or contained herein do not have specifications that can handle applications that require extremely high levels of reliability, such as life-support systems, aircraft’s control systems, or other applications whose failure can be reasonably expected to result in serious physical and/or material damage. Consult with your SANYO representative nearest you before using any SANYO products described or contained herein in such applications.

SANYO assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges,or other parameters) listed in products specifications of any and all SANYO products described or contained herein.

Monolithic Linear IC

Audio Level Sensor

Ordering number:ENN1343D

LA2010

SANYO Electric Co.,Ltd. Semiconductor Company

TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN

Overview

The LA2010 is an IC for detecting interprogram spaces to pick out the starting point of a program immediately preceding or following musical program recorded on tape.

Package Dimensions

unit:mm

3017C-SIP9

[LA2010]

Applicable Sets

• Radio-cassette recorders.

• Cassette decks.

• Car stereos.

4.8

Application

• Detection of spaces between programs recorded on tape.

Features

• Built-in transistor capable of driving plunger with 600mA max. and protective diode to prev ent induced rev erse voltage.

• Capable of desired timing setting by using external C, R.

• Detects unrecorded areas of tape and drives plunger.

• Built-in preventer to prevent plunger from malfunctioning at the time of application of power.

• Built-in detector to detect recorded area.

Specifications

Maximum Ratings at Ta = 25˚C

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Note ) · The voltage on pin 1 must not exceed the voltage 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 the voltage on pin 7.

xam 51V

xam 006Am

1.0

0.99

1.5

2.54

22.3

0.51min

0.5

1.3

SANYO : SIP9

3.0

5.7max

3.2

0.25

1.35

˚C ˚C

11200TH (KT)/5085MW/2146KI/0267KI No.1343–1/8

LA2010

Recommended Operating Conditions at Ta = 25˚C

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

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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.

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· 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= ......... (kHz)

0.3πC3 (µF)

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 + T

· For unrecorded area TS > TI + T

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

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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