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PDF LA3410 Data sheet ( Hoja de datos )
| Número de pieza | LA3410 | |
| Descripción | VCO Non-Adjusting PLL FM MPX Stereo Demodulator with FM Accessories | |
| Fabricantes | Sanyo | |
| Logotipo |  |
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Ordering number:ENN1407F
Monolithic Linear IC
LA3410
VCO Non-Adjusting PLL FM MPX
Stereo Demodulator with FM Accessories
Overview
The LA3410 is a multiplex demodulator IC designed for
FM stereo tuner. It features the VCO non-adjusting func-
tion that eliminates the need to adjust the free-running fre-
quency of VCO.
Applications
• Home stereos, portable hi-fi sets.
Package Dimensions
unit:mm
3006B-DIP16
[LA3410]
16 9
Functions
• VCO non-adjusting function.
• PLL MPX stereo demodulator.
• Gain variable type post amplifier.
• VCO stop function.
• Separation adjust function.
Features
• Non-adjusting VCO : Eliminates the need to adjust the
free-running frequency.
• Good temperature characteristic of VCO : ±0.1% typ. for
±50°C change.
• Low distortion at high frequencies in stereo main channel
(0.06% at f=10kHz) (Non-adjusting PLL makes the cap-
ture range narrower, leading to improvement in beat dis-
tortion at high frequencies in stereo main channel.)
• Low distortion : 1kHz 300mV input mono 0.025% typ.
main 0.02% typ.
• High S/N : 91dB typ. (mono 300mV input, LPF).
92dB typ. (mono 300mV input, IHF BPF).
• High voltage gain : Approximately 8.5dB (at standard
constants).
• Wide dynamic range : Distortion 1.0% at mono 800mV,
1kHz input.
• Good ripple rejection of power supply : 34dB typ.
1
19.2
0.71 2.54 0.48
8
1.2
SANYO : DIP16
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 Company
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
21000TH (KT)/90196RM/33194HO/O096KI/8024KI, TS No.1407–1/13
1 page  
(2) VCO stop method ™
LA3410
(a) Addition of diode (small-signal silicon diode)
Diode D1 is additionally connected across pins 11 and 15 as shown in
Fig. 2. In this case, the use of nonpolarized capacitors for C9, C10 across
pins 14 and 15 involves no problem (pin 15 : + polarity).
(Note) When D1 is connected across pins 11 and 14, stereo start time may
be 2 to 3 seconds late as compared with the application in Fig. 2.
(b) Setting of external voltage VS and limiting resistor RS.
The relation between VS and RS is shown in Fig. 10. When in the VCO stop mode, the value of RS must be set so
that the voltage on pin 11 is within the specified range (min=5.5V, max=VCC–3V). For example, it is seen from
Fig.10 that the value of limiting resistor RS is approximately 2.2kΩ when the voltage on pin 11 is set to 6V at
VS=12V.
2. Checking of free-running frequency
Since no pin is provided for checking the free-running frequency, the free-running
frequency is checked through a burrer amplifier with a high input impedance, low
input capacitance connected to pin 16. Fig. 3 shows a sample circuit configuration.
The frequency measured in this circuit configuration is 456kHz or thereabouts. The
frequency in 19kHz equivalent can be obtained by dividing this measured value by 24.
The wiring across pin 16 and the buffer amplifier input must be made as short as
possible (within 1cm).
3. Ceramic resonator
Ceramic resonators other than specified cannot be used in applications of the LA3410. The Type No., manufacturer of
the ceramic resonators specified are shown below. For particulars about the ceramic resonator, contact the mamufacturer.
Type No.
Manufacturer
CSB456F11 Murata
KBR-457HS Kyocera
4. Capture range and PLL loop filter constants
(1) Definition of capture range
Since the VCO of the LA3410 is adjustment-free, the capture range is defined by the following formula with the
deviation of the free-running frequency from the pilot signal considered.
Capture range C. R= F0–F1 – F0–456 × 100 [%]
F1 456
F0 : Free-running frequncy
F1 : Lock frequency when the input frequency is varied
No.1407–5/13
5 Page 
LA3410
No.1407–11/13
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet LA3410.PDF ] | |
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