FM Front-end for Radio-cassette Recorder, Home
Stereo Applications
Overview
The LA1185 is an FM receiver front-end IC for radio-cassette
recorder, music center applications. Its mixer is of
double-balanced type. The built-in oscillator and buffer
amplifier improves the strong input characteristic.
Use
.FM front-end IC for radio-cassette recorders and music
centers
Functions and Features
.RF amplifier, mixer, local oscillator
.Improvement in cross modulation characteristics due to the
use of double-balanced mixer.
.Improvement in strong input characteristic.
.Minimum number of external parts required.
.Less spurious radiation from local oscillator.
.Operating voltage range : 1.5 to 8.0 V
Package Dimensions
unit : mm
3017C-SIP9
[LA1185]
SANYO : SIP9
Specifications
Maximum Ratings at Ta = 25°C
Parameter Symbol Conditions Ratings Unit
Maximum supply voltage VCC max 8 V
Maximum pin voltage V3-5 12 V
V6-5 VCC + 0.8 V
Allowable power dissipation Pd max Ta %80°C 150 mW
Operating temperature Topr –20 to +80 °C
Storage temperature Tstg –40 to +125 °C
Ordering number: EN1521D
Monolithic Linear IC
LA1185
Any and all SANYO products described or contained herein do not have specifications that can handle
applications that require extremely high levels of reliability, such as life-support systems, aircraft’s
control systems, or other applications whose failure can be reasonably expected to result in serious
physical and/or material damage. Consult with your SANYO representative nearest you before using
any SANYO products described or contained herein in such applications.
SANYO assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other
parameters) listed in products specifications of any and all SANYO products described or contained
herein.
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
81096HA(II)/0067KI/N214MW/4124KI/9283KI,TS No.1521-1/5
Operating Conditions at Ta = 25°C
Parameter Symbol Conditions Ratings Unit
Recommended supply voltage VCC 4.5 V
Operating voltage range VCCop 1.5 to 8.0 V
Operating Characteristics at Ta = 25°C, VCC = 4.5 V, fr = 108 MHz, fOSC = 118.7 MHz,
See specified Test Circuit
Parameter Symbol Conditions min typ max Unit
Current dissipation ICC Quiescent 5.5 8.0 mA
Output saturation voltage Vo 100 dBµ 95 115 135 mVrms
Local oscillation voltage VOSC VCC = 2 V 190 235 mVrms
Oscillation stop voltage Vstop 1.4 1.6 V
Test Circuit and Equivalent Circuit Block Diagram
Allowable power dissipation, Pd max – mW
Ambient temperature, Ta – °C
(Sumida)
(Mitsumi)
(Mitsumi)
(Sumida)
Unit (resistance: Ω, capacitance: F)
LA1185
No.1521-2/5
Temperature Characteristic Test Circuit
MIX gain – dB ∆fOSC – kHz
Total gain – dB
Specified test circuit
Supply voltage, VCC –V
Oscillation output, VOSC – mVrms, ICC–0–mA
Band Characteristic
Local oscillation voltage
Conversion gain
Saturation output
Specified test circuit
with ANT B.P.F. removed
Conversion gain – dB
Receiving frequency, fr– MHz
Oscillation frequency, fOSC – MHz
Saturation output – dBµ
Local oscillation voltage – dBµ
MIX gain – dB
VCC Characteristic
65 dBµ sensitivity – dBµ
Current dissipation, ICC-O –mA
Temperature Characteristic
65 dBµ sensitivity
Ambient temperature, Ta – °C
VO-100– dBµ
Oscillation frequency, fOSC– MHz
Unit (resistance: Ω, capacitance: F)
LA1185
No.1521-3/5
Sample Application Circuit: LA1185 + LA1260 US band
AM section
Mitsumi Sumida
T1 YT-30224 2153-4016-006
T2 YT-30194 2153-4095-339
L1 YT-30196 0708-700
L2 YT-40001 0708-701
B.P.F. YT-30025 SNY-074-2001
Unit (resistance: Ω, capacitance: F)
LA185+LA1260 Overall Characteristic
Output – dBm
LED lightning sensitivity 11.5dB
Output fm= 400 Hz 30% mod
AM output fm= 1 kHz
ANT input – dBµ
THD–%
0dB
= 100%
LA1185+LA1260 Band Characteristic
Usable sensitivity S/N –30 dB input, – dBµ
LED lightning sensitivity, 3 dB L.S.
LED lightning sensitivity
Usable sensitivity
Saturation output
Remove 1st stage B.P.F. when testing
Receiving frequency, fr– MHz
Saturation output – mVrms
LA1185
No.1521-4/5
LA1185
PS No.1521-5/5
Specifications of any and all SANYO products described or contained herein stipulate the performance,
characteristics, and functions of the described products in the independent state, and are not guarantees
of the performance, characteristics, and functions of the described products as mounted in the customer’s
products or equipment. To verify symptoms and states that cannot be evaluated in an independent device,
the customer should always evaluate and test devices mounted in the customer’s products or equipment.
SANYO Electric Co., Ltd. strives to supply high-quality high-reliability products. However, any and all
semiconductor products fail with some probability. It is possible that these probabilistic failures could
give rise to accidents or events that could endanger human lives, that could give rise to smoke or fire,
or that could cause damage to other property. When designing equipment, adopt safety measures so
that these kinds of accidents or events cannot occur. Such measures include but are not limited to protective
circuits and error prevention circuits for safe design, redundant design, and structural design.
In the event that any or all SANYO products(including technical data,services) described or
contained herein are controlled under any of applicable local export control laws and regulations,
such products must not be exported without obtaining the export license from the authorities
concerned in accordance with the above law.
No part of this publication may be reproduced or transmitted in any form or by any means, electronic or
mechanical, including photocopying and recording, or any information storage or retrieval system,
or otherwise, without the prior written permission of SANYO Electric Co. , Ltd.
Any and all information described or contained herein are subject to change without notice due to
product/technology improvement, etc. When designing equipment, refer to the “Delivery Specification”
for the SANYO product that you intend to use.
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 August, 1996. Specifications and information herein are subject to
change without notice.
