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Ordering number: EN982C
Monolithic Linear IC
LA2000 Audio Level Sensor
Overview
LA2000 is an IC for detecting interprogram spaces to pick out the starting point of a program immediately preceding or following a musical program recorded on tape, and to detect end of tape.
Package Dimensions
unit : mm
3017B-SIP9
[LA2000]
Used in
. Radio-cassette recorders . Cassette decks . Car stereos
Applications
SANYO : SIP9
. Detection of spaces between programs recorded on tape . Detection of end of tape . Other
Features
. Has transistors capable of driving plungers with maximum . . .
600 mA, and a protective diode to prevent induced reverse voltages. Can provide designated time delays by externally connected capacitors and resistors. Has a comparator with stable hysteresis to handle variations in power supply voltage. Detects unrecorded portions of tape.
Specifications
Maximum Ratings at Ta = 25 C
Parameter Maximum supply voltage Allowable power dissipation Flow-in current Operating temperature Storage temperature Symbol VCC max Pd max I6 max Topr Tstg Conditions Ratings 15 540 600 -20 to +75 -40 to +125 Unit V mW mA C C
Note: 1. The voltage at pin 8 must not exceed the supply voltage at pin 9. 2. The maximum current flowing into pin 8 should be no greater than 0.5 mA.
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53096HA(II)/0267KI/5085MW/MW No.982-1/8
LA2000
Operating Conditions at Ta = 25C
Parameter Operating voltage range Symbol VCC op Conditions Ratings 3.5 to 14 Unit V
Electrical Characteristics at Ta = 25C, VCC = 9.0 V, f = 1 kHz
Parameter Circuit current Output transistor saturating voltage Output diode forward voltage Output-off level in input equivalent Comparator-on level Comparator-off level Pin 8 high level Output transistor leakage current Output diode leakage current Symbol ICC VCE (sat) VF VIN VTH-H VTH-L V8 pin IL-TR IL-Di Conditions f = 1 kHz, VIN = -45 dB I6 = 600 mA IF = 600 mA f = 1 kHz -43 3.0 1.8 0.45 min typ 6 1.5 1.5 -50 3.5 2.2 0.55 max 12 2.5 2.0 -54 4.0 2.6 Unit mA V V dBm V V V A A
100 100
1.
C1 C2
Description of external parts
Input coupling capacitor NF capacitor For designation of time delays Power supply ripple filter Bias resistor For diode when pin 8 is used to drive external transistors. A 1 k resistor is recommended. 0.47 to 2.2 F recommended. Capacitance is reduced, so the off level in input equivalent becomes lower in the bass frequency range. We recommend 1 to 10 F. Any time delay can be obtained by adequate choice of C3 and R1. We recommend 150 k to 500 k for R1.
C3, R1 C4, R3 R2
2.
Individual pins and their operations
VIN
Input signal level, VIN - dBm As shown above, when input level is raised and the pin 2 voltage reaches the VTH-H level of the comparator, pins 6 and 8 turn over. (VIN = -45 dBm). 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 ).
. . .
No.982-2/8
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 E0 =- t e E0 : Initial voltage E1 : Threshold voltage : Time constant
Accordingly, t = -In E1 E0
E1/E0, within the IC, is 0.26. A desired time is obtained by an appropriate choice of ( = C3R1). Therefore, the time delay is obtained by the following formula: t = 1.34 x C3R1 (sec) We recommend 150 k to 500 k 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 = 60C 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.
Allowable power dissipation, Pd max - mW
Collector current, I6 - mA
Ambient temperature, Ta - C
No.982-3/8
LA2000
Test Circuit
Unit (resistance: , capacitance: F)
Test Conditions
Test items Circuit current Output transistor saturation voltage Output diode forward voltage Output-off level in input equivalent Comparator-on level Comparator-off level Pin 8 high level Output transistor leakage current Output diode leakage current Symbol ICC VCE (sat) VF VIN VH VL Vp-8 ITL IDL SW-1 SW-2 SW-3 SW-4 1 2 2 1 2 2 2 2 2 1 2 4 1 3 3 4 4 4 1 2 2 1 1 1 1 3 4 3 3 1 3 3 3 3 3 2 Conditions Measure current flowing into pin 9 at VIN = -45 dB Measure VIN at pin 6 Measure VIN at pin 6 Input level (V.V) when pin 6 turns over Measure V3 When pin 6 turns over Measure V3 When pin 6 turns over Measure V2 at pin 8 Measure M3 Measure M2
Equivalent Circuit Block Diagram
No.982-4/8
LA2000
Sample Application Circuit 1
Mechanism-coupled switch (OFF at play mode) 600 mA max Plunger
Unit (resistance: , capacitance: F) Pin 4 is unconnected but is not be used for GND or an interconnection terminal.
Sample Printed Pattern (copper foil side)
Unit (resistance: , capacitance: F)
No.982-5/8
LA2000
Sample Application Circuit 2
Use a mechanism for the plunger off while functioning for program selection Unit (resistance: , capacitance: F) ICC - VCC V2pin, VH, VL - VCC
Circuit current, ICC - mA
Quiescent Operating
Supply voltage, VCC - V
V2pin, VH, VL - V
Supply voltage, VCC - V
No.982-6/8
LA2000
VIN - VCC
Input level when pin 6 ``L'' ``H''
VIN - f
Input level, VIN - dBm
Off On
Input level, VIN - dBm
Supply voltage, VCC - V V2pin - f
Frequency, f - Hz V2pin - VIN
V2pin - V
Frequency, f - Hz V2pin - VCC Output transistor saturation voltage, VCE (sat) - V
VIN
V2pin - V
Input level, VIN - dBm VCE (sat) - IC
V2pin - V
Supply voltage, VCC - V VF - Di Output diode forward voltage, VF - V
Collector current, IC - mA V2pin - Ta
V2pin - V
Diode forward current, Di - mA
Ambient temperature, Ta - C No.982-7/8
LA2000
V2pin - Ta VIN - Ta
Input level, VIN - dBm
V2pin - mV
Off level On level
Ambient temperature, Ta - C ICC - Ta
Ambient temperature, Ta - C
Circuit current, ICC - mA
Ambient temperature, Ta - C
No products described or contained herein are intended for use in surgical implants, life-support systems, aerospace equipment, nuclear power control systems, vehicles, disaster/crime-prevention equipment and the like, the failure of which may directly or indirectly cause injury, death or property loss. Anyone purchasing any products described or contained herein for an above-mentioned use shall: 1 Accept full responsibility and indemnify and defend SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors and all their officers and employees, jointly and severally, against any and all claims and litigation and all damages, cost and expenses associated with such use: 2 Not impose any responsibility for any fault or negligence which may be cited in any such claim or litigation on SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors or any of their officers and employees jointly or severally. Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for volume production. SANYO believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties. This catalog provides information as of May, 1996. Specifications and information herein are subject to change without notice.
No.982-8/8

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