Sanyo LA1178M Fm front end for car radio, home radio-use Datasheet

Ordering number : EN2712A
Monolithic Linear IC
LA1178M
FM Front End for Car Radio, Home Radio-Use
Functions
Package Dimensions
• Double end type mixer
• Oscillator buffer
• Oscillator
• Wide-band AGC circuit
unit: mm
3086-MFP10
• IF amplifier
[LA1178M]
Features
• Excellent intermodulation characteristic (wide-band AGC
circuit)
• On-chip local oscillation buffer for electronic tuning.
SANYO: MFP10
Specifications
Maximum Ratings at Ta=25°C
Parameter
Symbol
Conditions
Maximum supply voltage
VCC max
Pins 2, 3, 10
Allowable power dissipation
Pd max
Ta≤75°C
Ratings
Unit
10
V
440
mW
Operating temperature
Topr
–20 to +70
°C
Storage temperature
Tstg
–40 to +125
°C
Operating Conditions at Ta=25°C
Parameter
Symbol
Recommended supply voltage
VCC
Operating voltage range
VCC op
Conditions
Ratings
Unit
8
V
8 to 9
V
Electrical Characteristics at Ta=25°C, VCC=8V, fim=88MHz, See specified Test Circuit.
Parameter
Quiescent current
Symbol
ICCO
Conditions
Ratings
Unit
min
typ
max
No input
21
26
31
mA
7.7
0.3
V
AGC high-level voltage
VAGC-H
0dBµ, pin 4
AGC low-level voltage
VAGC-L
100dBµ, pin 4
AGC mixer input
VIN AGC
VAGC≤2V, Pin 4
IF saturation output voltage
VIF-max
110dBµ
8.0
0.07
V
67
74
81
dBµ
108
112
116
dBµ
Input limiting voltage
Vlim
81
88
95
dBµ
Voltage gain
VG
65dBµ
84
88
92
dBµ
Local OSC output voltage
VOSC
No input, 75Ω termination
80
84
88
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
VCC
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.
1
Function
Internal Equivalent Circuit
Remarks
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
VCC
VCC
No.2712-3/7
LA1178M
AGC Characteristic
AGC output voltage – V
IF output level – dBµ
AGC output voltage – V
Input/Output Characteristic
Mixer input level – dBµ
AGC Interting Level Characteristic
Mixer input level – dBµ
Mixer output level – dBµ
Mixer input level – dBµ
Mixer Input/Output Characteristic
Detuning frequency – MHz
Load Resistance Characteristic of OSC Buffer
OSC buffer output level – mVrms
OSC buffer output level – mVrms
Mixer input level – dBµ
Load Capacitance Characteristic of OSC Buffer
Load resistance, RL – Ω
Reduced Voltage Characteristic of OSC Buffer Output
OSC frequency variation – kHz
OSC buffer output level – mVrms
Load capacitance – pF
Reduced Voltage Characteristic of OSC Frequency
Supply voltage, VCC – V
Supply voltage, VCC – V
No.2712-4/7
LA1178M
IF Amp Input/Output Characteristic
Gain, VG – dB
IF-amp output level – dBµ
IF Amp Frequency Characteristic
Frequency, f – MHz
Current Drain Characteristic
Current drain, ICC – mA
IF-amp output level – dBµ
IF-amp input level – dBµ
Temperature Characteristic of Input/Output
Supply voltage,VCC – V
Mixer input level – dBµ
Temperature Characteristic of IF Amp Input/Output
Mixer output level – dBµ
IF-amp output level – dBµ
Temperature Characteristic of Mixer Input/Output
IF-amp input level – dBµ
Temperature Characteristic of VAGC-Lo Voltage
IF-amp output level – dBµ
Mixer input level at which AGC voltage is
inverted – dBµ
Mixer input level – dBµ
Temperature Characteristic of Mixer Input/Output
at which AGC Voltage is Inverted
Ambient temperature, Ta – °C
Ambient temperature, Ta – °C
No.2712-5/7
LA1178M
Temperature Characteristic of VAGC-Hi Voltage
VAGC-Hi voltage – V
OSC buffer output variation – dB
Temperature Characteristic of OSC Buffer Output
Ambient temperature, Ta – °C
Input/Output Characteristic
30dB QS sensitivity – dBµ
Demodulation output level – dBm
Ambient temperature, Ta – °C
Imtermodulation Characteristic
Undesired signal input level – dBµ
Mixer input level – dBµ
Smith Chart
IF AMP
Input/Output impedance (LA1175)
IF AMP
Input impedance (LA1178M)
IF AMP
Output impedance (LA1178M)
Mixer
Input impedance : f=80 to 110MHz
f=10.7MHz
No.2712-6/7
LA1178M
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 guaranteed 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.
No.2712-7/7
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