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 VCC 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 VCC VCC op Conditions Ratings 8 8 to 9 Unit V V
Electrical Characteristics at Ta=25°C, VCC=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 ICCO VAGC-H VAGC-L VIN AGC VIF-max Vlim VG VOSC 65dBµ No input, 75Ω termination No input 0dBµ, pin 4 100dBµ, pin 4 VAGC≤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 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. 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
VCC
VCC
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, RL – Ω Reduced Voltage Characteristic of OSC Buffer Output
OSC frequency variation – kHz
Supply voltage, VCC – V
Supply voltage, VCC – 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,VCC – V Temperature Characteristic of Mixer Input/Output
IF-amp output level – dBµ
Current drain, ICC – 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 VAGC-Lo Voltage
IF-amp output level – dBµ
Ambient temperature, Ta – °C
Ambient temperature, Ta – °C
No.2712-5/7
LA1178M
Temperature Characteristic of VAGC-Hi Voltage OSC buffer output variation – dB Temperature Characteristic of OSC Buffer Output
VAGC-Hi voltage – V
Ambient temperature, Ta – °C Imtermodulation Characteristic Demodulation output level – dBm
Ambient temperature, Ta – °C Input/Output Characteristic
30dB QS sensitivity – dBµ
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
