LA1135 Datasheet

AM Tuner System for Car Radios and Home Stereos

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
Page 1



LA1135, 1135M
Specifications
Maximum Ratings at Ta = 25°C
Parameter
Maximum supply voltage
Output voltage
Input voltage
Current drain
Flow-out current
Allowable power
dissipation
Operating temperature
Storage temperature
Symbol
VCC max
VO
VIN
ICC
I18
I20
Pd max
Topr
Tstg
Conditions
Pins 8, 14
Pins 7, 10
Pin 6
Pins 7 + 8 + 10 + 14
Pin 18
Pin 20
LA1135
LA1135M Ta % 60°C, with PCB
LA1135
LA1135M
Operating Conditions at Ta = 25°C
Ratings
16
24
5.6
41
2
2
730
660
–20 to +70
–40 to +80
–40 to +125
Unit
V
V
V
mA
mA
mA
mW
mW
°C
°C
°C
Parameter
Recommended supply
voltage
Operating supply voltage
range
Symbol
VCC
VCC op
Conditions
Ratings
8
7.5 to 12
Unit
V
V
Operating Characteristics at Ta = 25°C, VCC = 8 V, fr = 1 MHz, fm = 400 Hz, See specified Test
Circuit.
Parameter
Current drain
Detection output
Signal-to-noise ratio
Total harmonic distortion
Signal meter output
Input at signal meter output 1 V
Local oscillation buffer output
Symbol
ICC1
ICC2
VO1
VO2
S/N
THD1
THD2
THD3
VSM1
VSM2
VIN1
VOSC BUF
Conditions
Quiescent
130 dBµ input
16 dBµ input, 30% mod
74 dBµ input, 30% mod
74 dBµ input, 30% mod
74 dBµ input, 30% mod
74 dBµ input, 80% mod
130 dBµ input, 80% mod
Quiescent
130 dBµ input
VSM = 1 V
min
13.5
20.0
–29.0
–15.0
51.0
3.5
18.0
320
typ
22.5
30.0
–25.0
–12.0
56.0
0.3
0.3
0.4
0
5.0
24.0
380
max Unit
32.5 mA
41.0 mA
–21.0 dBm
–9.0 dBm
dB
1.0 %
1.0 %
2.0 %
0.3 V
7.5 V
30.0 dBµ
mVrms
No. 1272-2/18
Page 2



Reference Characteristics
Parameter
Usable sensitivity
Symbol
Q.S.
Wide-band AGC
ON-state input
Detection output variation
Local oscillation variation
within broadcast band
Signal meter band *
∆VO
∆VOSC
VSM-BW1
VSM-BW2
Selectivity
IF interference
IF. R.
Image frequency
interference
IM. R.
Note: *: Wide-band AGC OFF
( ): See circuit on page 7.
LA1135, 1135M
Conditions
Input at S/N = 20 dB
(2SK315 IDDS = 11 mA)
Reception 1.0 MHz quiescent
Interference 1.4 MHz non-mod
at input for AMT.D. ON
Input 74 dBµ → 130 dBµ
VOSCL – VOSCH
74 dBµ input, frequency at
which output is reduced to 1/2
74 dBµ input, frequency at
which output is reduced to 1/10
30 % mod ±10 kHz *
fr = 600 kHz *
fr = 1400 kHz *
Pd max – Ta
with 54 × 34 × 1.7 mm3 PCB
typ
25.0
82.0
0.2
15
±1.5
–4.5/+7
43
77.5
52.0
(63.0)
Unit
dBµ
dBµ
dB
mVrms
kHz
kHz
dB
dB
dB
Ambient temperature, Ta – °C
Equivalent Circuit Block Diagram
No. 1272-3/18
Page 3

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