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PDF LA1833N Data sheet ( Hoja de datos )
| Número de pieza | LA1833N | |
| Descripción | System-on-Chip Tuner IC for Home Stereo Systems | |
| Fabricantes | Sanyo Semicon Device | |
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Ordering number : ENN6568
Monolithic Linear IC
LA1833N, 1833NM
System-on-Chip Tuner IC for Home Stereo Systems
Overview
The LA1833N/NM is an AM/FM IF and MPX system-on-
chip IC that supports electronic tuning for home stereo
systems. It is optimal for use in auto-seek systems that use
SD (station detect) and IF counting in parallel.
Functions
• AM: RF amplifier, mixer, oscillator, IF amplifier,
detector, AGC, SD, oscillator buffer, IF buffer, and
stereo IF output
• FM IF: IF amplifier, quadrature detector, S meter, SD,
S-curve detector, IF buffer
• MPX: PLL stereo decoder, stereo indicator, forced
mono, VCO stop, audio muting, adjacent channel
interference reduction function, pilot canceller
Features
• Improvements over the LA1832
— The MPX VCO circuit has been integrated on the
same IC (no ceramic element required)
— Built-in adjacent channel interference reduction
function (114 kHz, 190 kHz)
— Built-in pilot canceler function (19 kHz)
— AM and FM output levels can be set independently
— Improved FM reception characteristics (IF beating
improved)
• Other features
— Pin arrangement nearly identical to that of the
LA1832
— AM coil specifications can be the same as those used
for the LA1832.
— ST operating dynamic range improved over that of
the LA1833
— FM total harmonic distortion detuning
characteristics and signal-to-noise ratio improved
over those of the LA1833
Package Dimensions
unit: mm
3112A-MFP24S
[LA1833N]
24 13
1 12.5 12 0.15
unit: mm
3067A-DIP24S
0.35 1.0 (0.75)
SANYO: MFP24S (300 mil)
[LA1833NM]
21.0
24 13
1
0.9
12
(0.71) 1.78 0.48
0.95
SANYO: DIP24S (300 mil)
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
D1500RM (OT) No. 6568-1/10
1 page  
Continued from preceding page.
Pin No.
Pin
Voltage (V)
LA1833N, 1833NM
Functional description
S meter
20 Also functions as the
AM AGC
0.2 (FM)
0.9 (AM)
Internal load resistor R = 13.9 kΩ.
The SD response speed during seek
operations is set by the value of the
external capacitor connected to pin 20.
21 AM RF-IN
Vreg
Pin 21 and pin 22 (the AFC voltage) are
used at the same potential
22 AFC
Vreg
The FM SD bandwidth can be adjusted by
an external resistor connected between
pin 22 and pin 3 (the regulator voltage).
Note: A bandwidth of 180 kHz or higher is
appropriate for the FM SD bandwidth.
23 OSC
The oscillator coil is connected between
pin 23 and pin 9 (the VCC voltage).
VCC Note: The oscillator coil impedance
(secondary side) must be at least
5 kΩ.
Oscillator buffer
24
Also functions as the
FM SD adjustment
VCC – 1.4
The FM SD sensitivity can be adjusted
with an external resistor on pin 24.
R = 200 Ω
Note: The resistance of the pin 24 external
resistor must be at least 3.3 kΩ.
Equivalent circuit
20
R
ILA00235
21
ILA00236
22
ILA00237
23
ILA00238
R
24
ILA00239
No. 6568-5/10
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet LA1833N.PDF ] | |
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