LA1178M
Ordering number : EN2712A
FM Front End for Car Radio, Home Radio-Use
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)/5099YT/N137KI, TS No.2712-1/7
Functions
• Double end type mixer • Oscillator
• Oscillator buffer • Wide-band AGC circuit
• IF amplifier
Features
• Excellent intermodulation characteristic (wide-band AGC
circuit)
• On-chip local oscillation buffer for electronic tuning.
Package Dimensions
unit: mm
3086-MFP10
[LA1178M]
SANYO: MFP10
Specifications
Maximum Ratings at Ta=25°C
Parameter Symbol Conditions Ratings Unit
Maximum supply voltage VCC max Pins 2, 3, 10 10 V
Allowable power dissipation Pd max Ta≤75°C 440 mW
Operating temperature Topr –20 to +70 °C
Storage temperature Tstg –40 to +125 °C
Operating Conditions at Ta=25°C
Parameter Symbol Conditions Ratings Unit
Recommended supply voltage VCC 8V
Operating voltage range VCC op 8 to 9 V
Electrical Characteristics at Ta=25°C, VCC=8V, fim=88MHz, See specified Test Circuit.
Parameter Symbol Conditions Ratings
min typ max Unit
Quiescent current ICCO No input 21 26 31 mA
AGC high-level voltage VAGC-H 0dBµ, pin 4 7.7 8.0 V
AGC low-level voltage VAGC-L 100dBµ, pin 4 0.07 0.3 V
AGC mixer input VIN AGC VAGC≤2V, Pin 4 67 74 81 dBµ
IF saturation output voltage VIF-max 110dBµ 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, 75Ωtermination 80 84 88 dBµ
Note) Extreme caution should be exercised when applying voltage across pin 10 and 3 as dielectric breakdown may occur.
LA1178M
Evaluation Circuit and Internal Equivalent Circuit Block Diagram
Typical Voltage on Each Pin and Pin Description
No.2212-2/7
Unit (resistance : Ω, capacitance : F)
Pin No. Typical voltage [V] Description Remarks
1 2.7 Mixer input
2 8.0 Mixer output
3 8.0 Mixer output
4 8.0 AGC input No input
5 2.0 IF amp input
6 0.0 GND
7 4.9 Oscillator base terminal
8 1.4 Oscillation buffer output
9 4.4 IF output
10 8.0 VCC
LA1178M
No.2712-3/7
Pin Description
Pin No. Function Internal Equivalent Circuit Remarks
1 Mixer input
2 Mixer output
AGC pickup pin is
connected.
3 Mixer output
4 Wide-band AGC output
5 IF amp input
RIN≈330Ω
6 IF amp input
7 OSC
8 OSC buffer output
9 IF amp output
ROUT≈330Ω
10 VCC VCC
LA1178M
No.2712-4/7
Input/Output Characteristic
Mixer input level – dBµ
IF output level – dBµ
Mixer Input/Output Characteristic
Mixer input level – dBµ
Mixer output level – dBµ
Load Capacitance Characteristic of OSC Buffer
Load capacitance – pF
OSC buffer output level – mVrms
Reduced Voltage Characteristic of OSC Frequency
Supply voltage, VCC – V
OSC frequency variation – kHz
Reduced Voltage Characteristic of OSC Buffer Output
Supply voltage, VCC – V
OSC buffer output level – mVrms
Load Resistance Characteristic of OSC Buffer
Load resistance, RL– Ω
OSC buffer output level – mVrms
AGC Interting Level Characteristic
Detuning frequency – MHz
Mixer input level – dBµ
AGC Characteristic
Mixer input level – dBµ
AGC output voltage – V
AGC output voltage – V
LA1178M
No.2712-5/7
IF Amp Frequency Characteristic
Current Drain Characteristic
Frequency, f – MHz
Gain, VG – dB
Temperature Characteristic of Mixer Input/Output
Mixer input level – dBµ
Mixer output level – dBµ Current drain, ICC – mA
Temperature Characteristic of Mixer Input/Output
at which AGC Voltage is Inverted
Ambient temperature, Ta – °C
Mixer input level at which AGC voltage is
inverted – dBµ
Temperature Characteristic of IF Amp Input/Output
IF-amp input level – dBµ
Mixer input level – dBµSupply voltage,VCC – V
IF-amp output level – dBµ
Temperature Characteristic of VAGC-Lo Voltage
Ambient temperature, Ta – °C
IF-amp output level – dBµ
Temperature Characteristic of Input/Output
IF-amp input level – dBµ
IF-amp output level – dBµIF-amp output level – dBµ
IF Amp Input/Output Characteristic
LA1178M
No.2712-6/7
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
Temperature Characteristic of VAGC-Hi Voltage
Ambient temperature, Ta – °C
VAGC-Hi voltage – V
Imtermodulation Characteristic
Undesired signal input level – dBµ
30dB QS sensitivity – dBµ
Input/Output Characteristic
Mixer input level – dBµ
Demodulation output level – dBm
Temperature Characteristic of OSC Buffer Output
Ambient temperature, Ta – °C
OSC buffer output variation – dB
LA1178M
No.2712-7/7
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.
