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Ordering number: EN2619B
Monolithic Linear IC
LA3335M
PLL FM Multiplex Demodulator for 3 V Headphone Stereos and Radio-cassette Recorders
Overview
The LA3335M is PLL FM stereo multiplex demodulator IC designed for use in headphone stereos, etc. which operate from a low supply voltage.
Package Dimensions
unit : mm
3086A-MFP10S
[LA3335M]
Applications
. FM Multiplex IC for 3 V headphones, radio-cassette
recorders
Functions
. PLL FM stereo decoder, VCO stop, stereo indicator
Features
. Wide operating voltage range : 1.8 to 6 V . Low current dissipation : 1.6 mA . Minimum number of external parts required
Specifications
Maximum Ratings at Ta = 25 C
Parameter Maximum supply voltage Lamp drive current Allowable power dissipation Operating temperature Storage temperature Symbol Conditions Ratings 8 10 Ta % 70 C 50 -20 to +70 -40 to +125 Unit V mA mW C C
SANYO : MFP10S
Operating Conditions at Ta = 25 C
Parameter Recommended supply voltage Operating voltage range Input signal voltage Symbol VCC VCC op VIN Conditions Ratings 3 1.8 to 6 150 Unit V V mV
max
VCC
IL max Pd max Topr Tstg
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.
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
O3096HA(II)/40594HK/O307TA,TS No.2619-1/6
LA3335M
Operating Characteristics at Ta = 25 C, VCC = 3 V, input 150 mV, L + R = 90%, pilot = 10%, f = 1 kHz, See specified Test Circuit.
Parameter Quiescent current Input resistance Output resistance Channel separation Total harmonic distortion Output voltage Channel balance Lamp lighting level Lamp hysteresis Capture range Allowable input level Signal to noise ratio Symbol ICCO Ri Ro CHsep THD VO CB VL hy CR VIN max S/N Conditions No input 35 5.3 30 Monaural Stereo main Monaural Monaural Pilot Pilot 15 mV Monaural, THD = 5% Monaural min typ 1.6 50 7.5 45 0.6 0.3 130 0 3.5 3.5 3 350 82 max 2.5 65 9.7 1.5 1.5 180 1.5 6 Unit mA k k dB % % mV dB mV dB % mV dB
90 1.5
Equivalent Circuit Block Diagram and Test Circuit
Decoder
Sync detection
Lamp trigger
Stereo Switch
Phase comparison
S1: VCO STOP when ON AMP: Bandwidth of 100 kHz or more, THD = 0.01% or less, input impedance of 330 k or more * Styrol capacitor
No.2619-2/6
LA3335M
External Parts
Part Name Resistor Semifixed resistor Symbol R1 R2 VR1 C1 C2 C3 Capacitor C4 C5 C6 C7 Kind Carbon resistor Carbon resistor Carbon resistor Electrolytic capacitor Electrolytic capacitor Polystyrol capacitor Electrolytic capacitor Ceramic capacitor Ceramic capacitor Electrolytic capacitor Value 27 k 560 10 k 2.2 F 0.1 F 1000 pF 1 F 6800 pF 6800 pF Remarks VCO time constant Limiting resistor VCO OSC frequency adjust DC blocking Loop filter VCO time constant Pilot detection De-emphasis De-emphasis Power supply ripple filter
Typical Voltage and Name of Each Pin
Pin No. 1 2 3 4 5 6 7 8 9 10 Voltage 1.2 V VCC-0.7 V VCC -- -- 0V -- VCC-0.7 V 1.3 V 1.3 V Input PLL loop filter Power supply VCO NC GND Stereo indicator Pilot sync detection filter Decoder output (low) Decoder output (high) Open collector VCC-0.2 V 0.65 VCC Name Remarks
Proper cares in using IC
1. VCO stop method Short pin 7 and pin 3 (VCC pin) to stop the VCO. (Note) The maximum voltage to be applied to pin 7 must not exceed the voltage on pin 3. Free-running frequency check method : Use either of the following two methods. a) Connect pin 4 to a frequency counter through the high input impedance amplifier.
2.
Figure 1
No.2619-3/6
LA3335M
b) Connect the connection point of the semifixed resistor connected to pin 4 and the fixed resistor to a frequency counter through the RX of 240 k. Fig. 2 shows how the error changes as the RX value is decreased. F - RX
Error, f - %
RX - Figure 2
3.
Separation setting mothod The LA3335M is so designed that the sub-signal gain is approximately 1.25 times as high as the main signal gain. The separation can be set by attenuating the sub-signal of the FM detection output. (See Figure 3)
Ro 6 Output impedance Figure 3 The value of capacitor Co depends on the attenuation of the sub-signal of the FM detection output and the IF IC output impedance Ro. Fig. 4 shows the value of separation setting capacitor Co when Ro is set to 3 k. For example, when the attenuation of sub-signal of the IF IC output is 0.9 time that of the main signal, it is seen from Figure 4 that the value of Co is approximately 500 pF.
Co - Attenuation
Capacitor value, Co - pF
Vs = Sub-signal peak value Vm = main signal peak value Separation : 35 to 40 dB, set to double hump response.
Input sub-signal attenuation, m - dB Figure 4
No.2619-4/6
LA3335M
THD - f Total harmonic distortion, THD - % Total harmonic distortion, THD - % THD - VCC
Free-running frequency: VCC = 3 V
Frequency, f - Hz THD - VIN Total harmonic distortion, THD - % Channel separation, CHsep - dB
Supply voltage, VCC - V CHsep - f
Input voltage, VIN - mV Sep - VCC
Free-running frequency: VCC = 3 V
Frequency, f - Hz VO - VCC
Output level, VO - mV
Separation, Sep - dB
Free funning frequency: VCC = 3 V
Supply voltage, VCC - V Lamp ON/OFF level - VCC Lamp ON/OFF Level - mV
Free-running frequency : VCC = 3 V
Supply voltage, VCC - V Capture range
ON level OFF level
Supply voltage, VCC - V
Capture range, CzR - % No.2619-5/6
Pilot level - mV
LA3335M
fF - VCC
No input
ICCO - VCC
No input
Free-running frequency, fF - kHz
Supply voltage, VCC - V
Quiescent current, ICCO - mA
Supply voltage, VCC - V
Specifications of any and all SANYO products described or contained herein stipulate the performance, characteristics, and functions of the described products in the independent state, and are not guarantees of the performance, characteristics, and functions of the described products as mounted in the customer's products or equipment. To verify symptoms and states that cannot be evaluated in an independent device, the customer should always evaluate and test devices mounted in the customer's products or equipment. SANYO Electric Co., Ltd. strives to supply high-quality high-reliability products. However, any and all semiconductor products fail with some probability. It is possible that these probabilistic failures could give rise to accidents or events that could endanger human lives, that could give rise to smoke or fire, or that could cause damage to other property. When designing equipment, adopt safety measures so that these kinds of accidents or events cannot occur. Such measures include but are not limited to protective circuits and error prevention circuits for safe design, redundant design, and structural design. In the event that any or all SANYO products(including technical data,services) described or contained herein are controlled under any of applicable local export control laws and regulations, such products must not be exported without obtaining the export license from the authorities concerned in accordance with the above law. No part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying and recording, or any information storage or retrieval system, or otherwise, without the prior written permission of SANYO Electric Co., Ltd. Any and all information described or contained herein are subject to change without notice due to product/technology improvement, etc. When designing equipment, refer to the "Delivery Specification" for the SANYO product that you intend to use. 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 October, 1996. Specifications and information herein are subject to change without notice. PS No.2619-6/6

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