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PDF LA1832 Data sheet ( Hoja de datos )
| Número de pieza | LA1832 | |
| Descripción | Support for AM Stereo and Electronic Tuning Radio Cassette Recorder/Music Center-Use Single-Chip IC | |
| Fabricantes | Sanyo Semicon Device | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de LA1832 (archivo pdf) en la parte inferior de esta página. Total 15 Páginas | ||
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lOrdering number: EN4805B |
isArno
NO.4B05B
Monolithic Linear IC
LA1832,1832M
Support for AM Stereo and Electronic Tuning
Radio Cassette Recorder/Music Center-Use
Single-Chip IC (AM/FM IF + MPX)
Overview
The LA 1832 and 1832M are single-chip AM/FM IF and
MPX tuner ICs that support electronic tuning. These
chips were developed for consumer audio systems and
is optimal for auto-seek systems based on IF count
methods used together with SD.
Since no adjustments are required in the FM detector
and MPX VCO circuits, use of these chips can
significantly reduce the number of adjustment steps in
the end-product manufacturing line.
Functions
AM: RF amplifier, mixer, oscillator (with ALC),
IF amplifier, detector AGC, oscillator buffer,
tuning indicator, IF buffer output, stereo
IF output.
FMIF: IF amplifier, quadrature detector, S curve
detection, tuning indicator, IF buffer output,
S-meter
MPX: PLL stereo decoder, stereo indicator, forced
mono, VCO slop
Features
• Major reduction in required adjustments
- FM detector: No adjustments
(ceramic discriminator used)
- M P X VCO: No adjustments
(ceramic resonator used)
• Tuning indicator pin provided (can be used as a
narrowband stop signal or a muting drive output):
SD output
• Supports IF count scheme
• Built-in SD time constant switching circuit
• Variable FM stop sensitivity and bandwidth
• Built-in AM local oscillator buffer
» Supports AM low-cut control
• Pin compatibility with the LA 1831 (See page 9 for
details on the differences between the LA1832 and the
LA1831.)
• Built-in IF output function for AM stereo
Package Dimensions
unit: mm
3067-DIP24S
[LA 1832]
»a
.nnnnnpnnnrinn
7I
22
uuuuuuuuuu i L
ZI.Z
0.48 0.95 1.78
3112-MFP24S
[LA1832M]
SANYO: DIP24S
1
BTBTHTHlTBTB/i
tSK
0.35
1.0
SANYO: MFP24S
Specifications
Maximum Ratings at Ta = 25°C
Parameter
Maximum supply voltage
Indicator drive current
Allowable power dissipation
Operating temperature
Storage temperature
Symbol
V c c max
•LED
Pd max
Topr
Tstg
Conditions
Pins 6 and 7
Ta S 70°C (LA1832)
Ta £ 70°C (IA1832M)
Ratings
9.0
20
400
270
-20 to + 70
-40 to +125
Unit
V
mA
mW
mW
SANYO Electric Co., Ltd. Semiconductor Business Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10,1 Chomc, Ucno, Tailo-ku, TOKYO, 110 JAPAN
30395TH (OT) No. 4805-1/15
1 page  
LA1832, 1832M
Pin Functions and Quiescent Voltages
No. Function
1 FM IF input
Pin voltage (V)
2.1
Equivalent circuit
o—
rV^i
i
2 AM MIX output
5.0
(p
-t
Notes
Input impedance ri = 330 f l
Used lor the MIX coi! between pin 2 and pin 9
(the V c c voltage)
3 REG
2.1
4 AM IF input
2.1
5 GND
0
6 TU-LED
5.0
7 ST-LED and IF
output for AM stereo
8 FM-DET
2.8 (FM)
3.4 (AM)
9 Vcc
10 AM/FM
IF count output and
control SW, and
muteSW.
5.0
0
11 Phase comparator
filter pin, and
AM/FM switch
12
Pin 11
3.8 (FM)
1.5 (AM)
Pin 12
3.8 (FM)
0 (AM)
-t
I
©—I
:p !
Vreg = 2.1 V
Input impedance ri = 2 kI2
(T )
—11—1
Active-T"
Open collector
"I
:
(' V 1
I
Recommended ceramic discriminator:
CDA10.7MG46-A (Murata Mfg. Co.. Ltd.)
FCD1070MA11SRL (TDK)
Hj
Ut /V3)
:!
V10 £ 0.5 V ... Reception state (normal)
1.4 V £ V10 £ 2.2 V ... Muting on (mute)
V10 2 3.5 V ... Muting on, IF counter on (seek)
Note: During seek, to improve SD speed the IF
buffer will be output only when SD is in the
on state.
Lr L, . ^
I t it
4
AM mode is selected when over 200
from pin 12.
flows
Continued on next page
No. 4805-5/15
5 Page 
LA1832, 1832M
AM frequency characteristics
fc = lMHz,30%mod | | |
V I N = 80dB//,0dB = 135mVrms
Frequency, f - Hz
AM IF output characteristics
AM AGC voltage characteristics
2A f C = l M h
(Pin 20 vollagc)
2.4
20
>
, 1.6
y
>° 1 7
0-8
04
20 CO 60 SO 100
ANT IN - dB^
120
AO 60
60
ANT IN - dBfx
FM temperature characteristics (1)
70
f c = K ).7MHz
«n 60
> 50
a§
V>)>
> 40
- 30
E
c-oa
I 20
st>°
Vtc
i 5.6
- 3dB L.S „
-
3.0
3 2.0
S
50dB n
E
w 1-0
•40
No s gnal
yj I
-20 0
20 40 " 60 80
Ambient temperature, Ta - °C
100
FM temperature characteristics (2)
1BO
fc=ic ,7MHz
f m = 1kHz
75kHz dev.
VIN = 100dBA
160
S D band^rvidth
8kS2
Vr—@
140
*
>O
g- -10
o
Pcmoc utaior c uiput
"8
E -20
80
a rN
70
601
-40 -20 0 20 40 60
Ambient temperature, Ta - °C
80 100
No. 4805-11/15
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet LA1832.PDF ] | |
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