LA1177
Ordering number : EN2257B
Electronic Tuning-Use FM Front End
for Car Radio, Home Stereos
Monolithic Linear IC
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
93097HA (KT)/3079TA/1268KI/8016KI, TS No.2257-1/8
Overview
The LA1177 is an FM front end IC for use in car radio,
home stereo applications. It requires fewer external parts.
The on-chip oscillator and oscillation buffer facilitate
designing of electronic tuning sets.
Features
Wide-band AGC circuit (Improvement in intermodu-
lation, cross modulation characteristics).
On-chip local oscillation buffer (For electronic tuning).
Functions
Oscillator, oscillation buffer.
Mixer.
Wide-band AGC circuit.
IF amplifier.
Package Dimensions
unit: mm
3017C-SIP9
[LA1177]
SANYO: SIP9
Specifications
Maximum Ratings
at Ta=25C
Parameter
Symbol
Conditions
Ratings
Unit
Maximum supply voltage
V
CC
max
Pins 2, 9
10
V
Allowable power dissipation
Pd max
Ta
70C
440
mW
Operating temperature
Topr
20 to +70
C
Storage temperature
Tstg
40 to +125
C
Operating Conditions
at Ta=25C
Parameter
Symbol
Conditions
Ratings
Unit
Recommended supply voltage
V
CC
8
V
Operating voltage range
V
CC
op
8 to 9
V
Electrical Characteristics
at Ta=25C, V
CC
=8V, fin=88MHz
Parameter
Symbol
Conditions
Ratings
min
typ
max
Unit
Quiescent current
I
CCO
No input
21
26
31
mA
AGC high-level voltage
V
AGC
-H
V
IN
=0dB
7.7
8.0
V
AGC low-level voltage
V
AGC
-L
V
IN
=100dB
0.07
0.3
V
AGC mixer input voltage
V
i AGC
V
AGC
2V, Pin 3
73
80
87
dB
IF saturation output voltage
V
IF
-max
V
IN
=1.0dB
108
112
116
dB
Input limiting voltage
V
i lim
76
83
90
dB
Voltage gain
VG
V
IN
=65dB
88
92
96
dB
Local OSC output voltage
V
OSC
No input, 75
termination
80
84
88
dB
LA1177
Evaluation Circuit and Internal Equivalent Circuit Block Diagram
Typical Voltage on Each Pin
No.2257-2/8
T1 : YT30224 (Mitsumi)
L1 : HU-50448 (Mitsumi)
CF1-CF2 : SFE10.7MA (Murata)
Unit (resistance :
, capacitance : F)
Pin No.
Typical voltage
Description
Remarks
1
2.7V
Mixer input
2
8.0V
Mixer output
3
8.0V
AGC input
No input
4
2.0V
IF input
5
0V
GND
6
4.9V
Oscillator base terminal
7
1.4V
Oscillation buffer output
8
4.4V
IF output
9
8.0V
V
CC
Note : Extreme caution should be exercised when applying voltage across pin 9 (+)
and other pins as dielectric breakdown may occur.
LA1177
No.2257-3/8
Sample Printed Circuit Pattern
Sample Application Circuit
Unit (resistance :
, capacitance : F)
Unit (resistance :
, capacitance : F)
Cu-foiled area 85
82 mm
2
LA1177
No.2257-4/8
Input/Output Characteristic
Mixer input level dB
IF amp output level dB
AGC Detuning Characteristic
Detuning frequency MHz
Mixer input level dB
Load Resistance Characteristic of OSC Buffer
Load resistance, R
L
OSC buffer output level mVrms
Reduced Voltage Characteristic of OSC Frequency
Supply voltage, V
CC
V
OSC buffer output level mVrms
IF Amp Frequency Characteristic
Frequency, f kHz
Voltage gain, VG dB
Reduced Voltage Characteristic of OSC Frequency
Supply voltage, V
CC
V
OSC frequency variation kHz
Load Delay Characteristic of OSC Puffer
Load capacitance pF
OSC buffer output level mVrms
Mixer Input/Output Characteristic
Mixer input level dB
Mixer output level dB
AGC output voltage V
LA1177
No.2257-5/8
IF Amp Input/Output Characteristic
IF amp input level dB
IF amp output level dB
Input/Output Characteristic
Mixer input level dB
Total harmonic distortion, THD %
Demodulation output level dBm
Input/Output Characteristic
with Temperature as Parameter
Mixer input level dB
IF amp output level dB
Mixer Input/Output Characteristic
with Temperature as Parameter
Mixer input level dB
Mixer output level dB
Temperature Characteristic of IF Amp Input/Output
Ambient temperature, Ta C
Relative level deviation of IF amp output dB
Input/Output Characteristic of Mixer Input/Output
Ambient temperature, Ta C
Relative level deviation of Mixer output dB
Current Drain Characteristic
Supply voltage, V
CC
V
Current drain, I
CC
mA
Temperature Characteristic of Mixer Input/Output
Ambient temperature, Ta C
Relative level deviation of IF amp output dB
AGC output voltage V
LA1177
No.2257-6/8
IF Amp Input/Output Characteristic
with Temperature as Parameter
IF amp input level dB
IF amp output level dB
Temperature Characteristic of V
AGC-L
Voltage
Ambient temperature, Ta C
V
AGC-L
voltage V
Temperature Characteristic of OSC Frequency
Ambient temperature, Ta C
OSC frequency variation kHz
OSC Frequency Characteristic
OSC frequency MHz
OSC level dB
Reception Sensitivity Characteristic
Receiving frequency MHz
Mixer input 30dB QS sensitivity dB
Temperature Characteristic of OSC Buffer Output
Ambient temperature, Ta C
OSC buffer output variation dB
Temperature Characteristic of V
AGC-H
Voltage
Ambient temperature, Ta C
V
AGC-H
voltage V
Temperature Characteristic of Mixer Input level
at which AGC Voltage is Inverted
Ambient temperature, Ta C
Mixer input level at which AGC voltage
is inverted dB
LA1177
No.2257-7/8
AGC Characteristic
Mixer input level dB
AGC output voltage V
Input/Output Characteristic
Antenna Input level dB
Demodulation level dB
Intermodulation Characteristic (Mixer alone)
Undesired signal input level dB
30dB QS sensitivity dB
Intermodulation Characteristic (3SK181)
Undesired signal input level dB
30dB QS sensitivity dB
Intermodulation Characteristic (3SK114)
Undesired signal input level dB
30dB QS sensitivity dB
Input/Output Characteristic
Mixer Input level dB
Demodulation level dBm
AGC voltage, V
AGC
V
Intermodulation Characteristic
Undesired signal input level dB
30dB QS sensitivity dB
LA1177
No.2257-8/8
No products described or contained herein are intended for use in surgical implants, life-support systems,
aerospace equipment, nuclear power control systems, vehicles, disaster/crime-prevention equipment and
the like, the failure of which may directly or indirectly cause injury, death or property lose.
Anyone purchasing any products described or contained herein for an above-mentioned use shall:
Accept full responsibility and indemnify and defend SANYO ELECTRIC CO., LTD., its affiliates,
subsidiaries and distributors and all their officers and employees, jointly and severally, against any
and all claims and litigation and all damages, cost and expenses associated with such use:
Not impose any responsibilty for any fault or negligence which may be cited in any such claim or
litigation on SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors or any of
their officers and employees jointly or severally.
Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guarant-
eed for volume production. SANYO believes information herein is accurate and reliable, but no guarantees
are made or implied regarding its use or any infringements of intellectual property rights or other rights of
third parties.
This catalog provides information as of September, 1997. Specifications and information herein are
subject to change without notice.
Intermodulation Characteristic (Comparison) - (1)
Undesired signal input level dB
30dB QS sensitivity dB
Intermodulation Characteristic (Comparison) - (2)
Undesired signal input level dB
30dB QS sensitivity dB
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