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PDF LA1260 Data sheet ( Hoja de datos )
| Número de pieza | LA1260 | |
| Descripción | FM/AM Tuner System for Radio-Casette Recorders/ Music Centers | |
| Fabricantes | Sanyo Semicon Device | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de LA1260 (archivo pdf) en la parte inferior de esta página. Total 14 Páginas | ||
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Ordering number : EN1506D
Monolithic Linear IC
LA1260
FM/AM Tuner System
for Radio-Casette Recorders, Music Centers
Functions
FM : IF amplifier, quadrature detector, AF preamplifier,
tuning indicator drive output.
AM : RF amplifier, MIX, OSC (with ALC), IF amplifier,
Detector, AGC, tuning indicator drive.
Package Dimensions
unit : mm
3006B-DIP16
[LA1260]
Features
• Minimum number of external parts required (No AM
detection coil required).
• High S/N : FM 81dB
AM 53dB
• Low-level AM oscillator with ALC : Pin 16 OSC output
MW 130mV
SW 70 mV to 90 mV
(7MHz) (24MHz)
• Less AM whistle interference : Whistle 1% at input 100dB/m.
• On-chip LED tuning indicator driver.
• On-chip FM/AM selector.
• Independent FM/AM output pins : Possible to set FM/AM frequency characteristic independently.
SANYO : DIP16
Specifications
Maximum Ratings at Ta=25°C, See specified Test Circuit.
Parameter
Symbol
Conditions
Maximum supply voltage
Maximum current drain
Flow-in current
VCC max
ICC max
I7
Pins 6, 12
Pins 6+7+12
Pin 7
Flow-out current
Allowable power dissipation
I15
Pd max
Pin 15
Ta≤70°C
Operating temperature
Topr
Storage temperature
Tstg
Ratings
9
50
20
0.1
450
–20 to +70
–40 to +125
Unit
V
mA
mA
mA
mW
°C
°C
Operating Conditions at Ta=25°C
Parameter
Symbol
Recommended operating voltage VCC
Operating voltage range
VCC op
Conditions
Ratings
4.5
3.0 to 8.0
Unit
V
V
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
N2897HA (KT)/33194HO/O067KI/8225MW/4045KI/8084KI, TS No.1506-1/14
1 page  
LA1260
Figure 7
MW OSC characteristic
Relation between turn
ration n and OSC level
AM oscillation coil
Unit (capacitance : F)
Receiving frequency, fr – Hz
Generally speaking, the following should be noted. Winding with loose
coupling between 1 and 2 and between 1 and 3 must be avoided. (Particularly
SW1, SW2).
To put in concretely, the pot core type is better than the screw core type which
is loose in coupling. This prevents the local oscillation frequency from turning
third resonance frequency related to the coupling coefficient.
LED unlighted time and distortion in AM (MW)
By increasing the value of the electrolytic capacitor for AGC at pin 11 (Figure 8), the distortion in the AM mode can
be improved, but the LED unlighted time is made longer. 10µF is recommended for obtaining the optimum LED
unlighted time and distortion. The LED unlighted time is 200ms at this value (Approximately 400ms at 22µF).
FM-AM selection and dc level at pin 12
(1) Pin 12-used method=recommended circuit
The FM mode is entered with pin 12 open. When pin 12 and pin 6
are at the same potential in terms of DC, the AM circuit is turned on
by the internal switch. It should be noted that the dynamic range is
narrowed whether the potential at pin 12 is lower or high than that
at pin 6.
(2) Pin 13-used method
The AM mode is entered with pin 13 open. When pin 13 is
grounded, the FM circuit is turned on and the AM circuit is turned
off by the internal switch. In this case, pin 12 and pin 6 (VCC) are
at the same potential.
Figure 8
Input 100dBm
VCC=4.5V
AM mod. char. and electrolytic
capacitor at pin 11.
100Hz, capacitor across pin 11 and Gnd : 10µF
Unit (capacitance : F)
Modulation degree – %
No.1506-5/14
5 Page 
LA1260
8.5MHz spurious response
Output –39dBm
(referenced to ANT
input 24.5dBµ, 8.5MHz)
8.5MHz to 9.4MHz spurious response
Output –30dBm
(referenced to ANT
input 24.5dBµ, 8.5MHz)
Frequency, f – MHz
Receiving frequency, fr – MHz
SW input/output char.
30% detection
output
ANT input voltage – dB/m
LED lighted
Detection
output
AM mod. output
Noise voltage
Distortion
ANT input voltage – dBµ
No.1506-11/14
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet LA1260.PDF ] | |
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