Ordering number : EN2712A
Monolithic Linear IC
LA1178M
FM Front End for Car Radio, Home Radio-Use
Functions
• Double end type mixer
• Oscillator buffer
• IF amplifier
• Oscillator
• Wide-band AGC circuit
Package Dimensions
unit: mm
3086-MFP10
[LA1178M]
Features
• Excellent intermodulation characteristic (wide-band AGC
circuit)
• On-chip local oscillation buffer for electronic tuning.
Specifications
Maximum Ratings
at Ta=25°C
Parameter
Maximum supply voltage
Allowable power dissipation
Operating temperature
Storage temperature
Symbol
V
CC
max
Pd max
Topr
Tstg
Ta≤75°C
Conditions
Pins 2, 3, 10
Ratings
SANYO: MFP10
Unit
10
440
V
mW
°C
°C
–20 to +70
–40 to +125
Operating Conditions
at Ta=25°C
Parameter
Recommended supply voltage
Operating voltage range
Symbol
V
CC
V
CC
op
Conditions
Ratings
8
8 to 9
Unit
V
V
Electrical Characteristics
at Ta=25°C, V
CC
=8V, fim=88MHz, See specified Test Circuit.
Parameter
Quiescent current
AGC high-level voltage
AGC low-level voltage
AGC mixer input
IF saturation output voltage
Input limiting voltage
Voltage gain
Local OSC output voltage
Symbol
I
CCO
V
AGC
-H
V
AGC
-L
V
IN AGC
V
IF
-max
V
lim
VG
V
OSC
65dBµ
No input, 75Ω termination
No input
0dBµ, pin 4
100dBµ, pin 4
V
AGC
≤2V,
Pin 4
110dBµ
67
108
81
84
80
Conditions
Ratings
min
21
7.7
typ
26
8.0
0.07
74
112
88
88
84
0.3
81
116
95
92
88
max
31
Unit
mA
V
V
dBµ
dBµ
dBµ
dBµ
dBµ
Note) Extreme caution should be exercised when applying voltage across pin 10 and 3 as dielectric breakdown may occur.
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
93097HA (KT)/5099YT/N137KI, TS No.2712-1/7
LA1178M
Typical Voltage on Each Pin and Pin Description
Pin No.
1
2
3
4
5
6
7
8
9
10
Typical voltage [V]
2.7
8.0
8.0
8.0
2.0
0.0
4.9
1.4
4.4
8.0
Description
Mixer input
Mixer output
Mixer output
AGC input
IF amp input
GND
Oscillator base terminal
Oscillation buffer output
IF output
V
CC
Remarks
No input
Evaluation Circuit and Internal Equivalent Circuit Block Diagram
Unit (resistance :
Ω,
capacitance : F)
No.2212-2/7
LA1178M
Pin Description
Pin No.
Function
Internal Equivalent Circuit
Remarks
1
Mixer input
AGC pickup pin is
connected.
2
Mixer output
3
Mixer output
4
Wide-band AGC output
RIN
≈330Ω
5
IF amp input
6
IF amp input
7
OSC
8
OSC buffer output
ROUT
≈330Ω
9
IF amp output
10
V
CC
V
CC
No.2712-3/7
LA1178M
Input/Output Characteristic
AGC Characteristic
AGC output voltage – V
AGC output voltage – V
IF output level – dBµ
Mixer input level – dBµ
Mixer Input/Output Characteristic
Mixer input level – dBµ
AGC Interting Level Characteristic
Mixer output level – dBµ
Mixer input level – dBµ
Mixer input level – dBµ
Load Capacitance Characteristic of OSC Buffer
OSC buffer output level – mVrms
Detuning frequency – MHz
Load Resistance Characteristic of OSC Buffer
OSC buffer output level – mVrms
Load capacitance – pF
Reduced Voltage Characteristic of OSC Frequency
OSC buffer output level – mVrms
Load resistance, R
L
–
Ω
Reduced Voltage Characteristic of OSC Buffer Output
OSC frequency variation – kHz
Supply voltage, V
CC
– V
Supply voltage, V
CC
– V
No.2712-4/7
LA1178M
IF Amp Frequency Characteristic
IF Amp Input/Output Characteristic
Frequency, f – MHz
Current Drain Characteristic
IF-amp output level – dBµ
Gain, VG – dB
IF-amp input level – dBµ
Temperature Characteristic of Input/Output
Supply voltage,V
CC
– V
Temperature Characteristic of Mixer Input/Output
IF-amp output level – dBµ
Current drain, I
CC
– mA
Mixer input level – dBµ
Temperature Characteristic of IF Amp Input/Output
Mixer input level – dBµ
Temperature Characteristic of Mixer Input/Output
at which AGC Voltage is Inverted
Mixer input level at which AGC voltage is
inverted – dBµ
IF-amp output level – dBµ
Mixer output level – dBµ
IF-amp input level – dBµ
Temperature Characteristic of V
AGC-Lo
Voltage
IF-amp output level – dBµ
Ambient temperature, Ta – °C
Ambient temperature, Ta – °C
No.2712-5/7
单片机
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