DataSheet.es    


PDF LA1805 Data sheet ( Hoja de datos )

Número de pieza LA1805
Descripción AM/FM-IF/MPX Tuner System for Radio-Casette Recorders/ Music Centers
Fabricantes Sanyo Semicon Device 
Logotipo Sanyo Semicon Device Logotipo



Hay una vista previa y un enlace de descarga de LA1805 (archivo pdf) en la parte inferior de esta página.


Total 13 Páginas

No Preview Available ! LA1805 Hoja de datos, Descripción, Manual

Ordering number : EN2887B
Monolithic Linear IC
LA1805
AM/FM-IF/MPX Tuner System
for Radio-Casette Recorders, Music Centers
Overview
Package Dimensions
The LA1805 is a characteristics-improved version of the unit : mm
LA1810, with the same pin assignment and package as
3067-DIP24S
those of the LA1810. Improvements are made on the
following point :
• Separation (35dB48dB) and its dependence on free-
24
[LA1805]
13
running frequency (Sep – fF Characteristic on page 4).
• FM main distortion (0.8%0.45%).
• AM detection output (approximately 5dB increased).
The constants on five external parts are changed as shown
1
12
21.2
on page 10.
Functions
0.81 1.78 0.48
• FM-IF : IF amp, quadrature detector, soft muting, tuning
indicator.
• MPX : PLL stereo decoder, stereo indicator, forced
monaural, VCO stop.
• AM :RF amp, MIX, OSC (with ALC), IF amp, detector,
AGC, tuning indicator.
0.95
SANYO : DIP24S
Features
• FM/AM/MPX functions contained on a single chip.
• Minimum number of external parts required.
• On-chip FM muting function.
• High sensitivity.
• Less carrier leak of MPX.
Specifications
Maximum Ratings at Ta=25°C, See specified Test Circuit.
Parameter
Symbol
Conditions
Maximum supply voltage
Maximum supply current
VCC max Pins 3, 7, 8, 11, 20, 21
ICC max Pins 3+20+21
Flow-in current
ILED
Pins 7, 8
(Indicator drive current)
Flow-out current
Allowable power dissipation
I23
Pd max
Pin 23
Ta70°C
Operating temperature
Topr
Storage temperature
Tstg
Ratings
9
50
20
Unit
V
mA
mA
0.1
500
–20 to +70
–40 to +125
mA
mW
°C
°C
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
12798HA (KT)/D0994JN/4030MO/N148YT, TS No.2887-1/13

1 page




LA1805 pdf
LA1805
5. FM muting pin
The external resistor connected to pin 12 can be used to vary the muting level (Figure 9). The abnormal sound at the
time of side peak reception at the FM mode can be reduced by weak signal muting.
LA1186N+LA1805 Muting Characteristics
LA1186N+LA1805 Attenuation – Detuning Frequency
Noise
Input – dBµ
Detuning frequency, f – kHz
Figure 9
Figure 10
6. The following method can be used to change the LED ON sensitivity at the FM mode (Figure 11). The data on the
LED ON sensitivity setting resistance and LED ON sensitivity is shown in Figure 12.
LED ON Sensitivity – R
Figure 11 Method to Change the LED ON
Sensitivity at the FM Mode
Unit (capacitance : F)
7. AM-FM selection
The FM mode is entered with pin 11 open as shown in
Figure 13. When pin 11 and pin 21 are made to be at
the same potential in terms of DC, the AM mode is
entered. It should be noted that the dynamic range is
narrowed whether the potential at pin 11 is lower or
higher than that at pin 21.
Reference (R=Open)
Resistance, R –
Figure 12
Figure 13
8. If a noise appears in the detection output when the tuning LED goes ON at the AM mode, connect a capacitor across
pin 8 and GND to eliminate the noise.
No.2887-5/13

5 Page





LA1805 arduino
LA1805
Sample Printed Circuit Pattern (See Sample Application Circuit.)
LA1186N + LA1805 Over Characteristics
Detection output
AM output
(Cu-foiled area)
Unit (resistance : , capacitance : F)
LA1186N + LA1805 Over Characteristics
Noise voltage
ANT input voltage – dBµ
ANT input voltage – dBµ
Differences between LA1805 and LA1806
(1) Same pin assignment
(2) The internal circuit of the MPX OUT (pin 9, pin 10) is different as shown below.
The FM S curve at pin 17 is in the opposite direction and the circuit in which AFC is provided is the same for the
US band and Japanese band.
The LA1805 contains the output load resistors
(Output load resistance=6.8k)
For the LA1806, output load resistors RL, RR are connected-
xternally. The graph of demodulation output vs. RL (RR) is
shown below.
No.2887-11/13

11 Page







PáginasTotal 13 Páginas
PDF Descargar[ Datasheet LA1805.PDF ]




Hoja de datos destacado

Número de piezaDescripciónFabricantes
LA1800FM/AM Single-Chip RadioSanyo Semicon Device
Sanyo Semicon Device
LA1805AM/FM-IF/MPX Tuner System for Radio-Casette Recorders/ Music CentersSanyo Semicon Device
Sanyo Semicon Device
LA1806AM/FM-IF/MPX Tuner System for Radio-Cassette Recorders/ Music CentersSanyo Semicon Device
Sanyo Semicon Device

Número de piezaDescripciónFabricantes
SLA6805M

High Voltage 3 phase Motor Driver IC.

Sanken
Sanken
SDC1742

12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters.

Analog Devices
Analog Devices


DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares,
permitiéndote verlos en linea o descargarlos en PDF.


DataSheet.es    |   2020   |  Privacy Policy  |  Contacto  |  Buscar