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PDF LA1135 Data sheet ( Hoja de datos )
| Número de pieza | LA1135 | |
| Descripción | AM Tuner System for Car Radios and Home Stereos | |
| Fabricantes | Sanyo Semicon Device | |
| Logotipo |  |
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Ordering number: EN1272E
Monolithic Linear IC
LA1135, 1135M
AM Tuner System for
Car Radios and Home Stereos
Overview
The LA1135 is a high-performance AM electronic tuner IC that
is greatly improved in cross modulation characteristics. It is
especially suited for use in car radio and home stereo (antenna:
loop) applications.
Package Dimensions
unit : mm
3021B-DIP20S
[LA1135]
Functions
. MIX
. OSC (with ALC)
. IF amplifier
. Detector
. AGC (normal)
. RF wide-band AGC
. Auto search stop signal (signal meter output)
. Local oscillation buffer output
. Others
Features
. Excellent cross modulation characteristics: Meets the
requirements for preventing not only adjacent-channel
interference but also interference caused by all channels
. within broadcast band.
Narrow-band signal meter output: Usable as auto search stop
. signal. Has linearity up to 80 dBµ.
Local oscillation buffer output: Facilitates designing of
. electronic tuner system, frequency display, etc.
OSC (with ALC): Improves tracking error because
oscillation output is stabilized at a low level (380 mVrms)
. for varactor diode.
MIX: Double-balanced differential MIX meeting the
requirements for preventing spurious interference, IF
. interference.
Good characteristics at high input: 130 dBµ input
fm = 400 Hz 80% mod THD = 0.4% typ
. Low noise: Good S/N at medium input (56 dB typ)
. Usable sensitivity: (S/N = 20 dB input): 25 dBµ (2SK315
. IDSS = 11mA)
VCC variation compensation: Less variation in gain,
. distortion: 8 to 12 V
Reduced pop noise: Capable of reducing pop noise at the
time of VCC ON, mode select by adjusting AGC time
constant.
unit : mm
3036B-MFP20
SANYO : DIP20S
[LA1135M]
SANYO: MFP20
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
93097HA(II)/D0994JN/O217KI/4034KI.TS(KOTO) No.1272-1/18
1 page  
Test Circuit 2
VCC = 8 V, fr = 1 MHz, fm = 400 Hz
LA1135, 1135M
DC voltmeter
Probe load open
Detection output
Distortion meter
Unit (resistance: Ω, capacitance: F)
Coil
T1
YT-30202
(Mitsumi)
T2
YT-30018
(Mitsumi)
T3
CFMA-021A
(Toko)
T4
YT-30007
(Mitsumi)
T5
YT-30008
(Mitsumi)
Varactor diode
Narrow-band filter
SVC321 (Sanyo)
BFU450CN (Murata)
No. 1272-5/18
5 Page 
LA1135, 1135M
(4) IFT (II)
YT-30007 (Mitsumi)
4140-1289-164 (Sumida)
7MC-6272N (Toko)
1–2 115T
111T
110T
4–6 6T 6T 6T
2–3 37T 36T 36T
Center frequency 455 kHz, Center frequency 455 kHz Center frequency 455 kHz,
Qu = 110%
Qu = 110%
Qu = 110%
Tuning capacitance 180 pF Tuning capacitance 180 pF Tuning capacitance 180 pF
(5) Varactor diode: SVC321
(6) FET at RF stage: 2SK315 F, G
2SK427 T, U
(7) Transistor for AGC
FET AGC: 2SC536 F, G
ANT damping: 2SC930 E
(8) Narrow-band resonator BFU450CN Murata
Overall Characteristics
Detection output at 30% mod
Band Characteristics
Tracking at each point
IF interference
Input voltage – dBµ
Tweet Input Characteristics
Signal characteristic
fr = 900 kHz fm = 400 Hz 30% mod
Complete tuning
(Beat max. at
900 kHz tuning)
Complete tuning
(Zero beat)
ANT input – dBµ
Wide-band AGC cutoff
Image frequency
interference
Input at 20 dB S/N
Input at –25 dBm output
Receiving frequency, fr – kHz
No. 1272-11/18
11 Page | ||
| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet LA1135.PDF ] | |
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