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Ordering number: EN1521D
Monolithic Linear IC
LA1185
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
Specifications
Package Dimensions
unit : mm
3017C-SIP9
[LA1185]
SANYO : SIP9
Maximum Ratings at Ta = 25°C
Parameter Symbol Conditions Ratings Unit
Maximum supply voltage V
Maximum pin voltage 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
max 8 V
CC
3-5
V
6-5
12 V
VCC+ 0.8 V
Operating Conditions at Ta = 25°C
Parameter Symbol Conditions Ratings Unit
Recommended supply voltage V
Operating voltage range V
CC
op 1.5 to 8.0 V
CC
4.5 V
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
81096HA(II)/0067KI/N214MW/4124KI/9283KI,TS No.1521-1/5
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LA1185
Operating Characteristics at Ta = 25°C, VCC= 4.5 V, fr = 108 MHz, f
= 118.7 MHz,
OSC
See specified Test Circuit
Parameter Symbol Conditions min typ max Unit
Current dissipation I
Output saturation voltage Vo 100 dBµ 95 115 135 mVrms
Local oscillation voltage V
Oscillation stop voltage Vstop 1.4 1.6 V
CC
OSC
Allowable power dissipation, Pd max − mW
Quiescent 5.5 8.0 mA
VCC= 2 V 190 235 mVrms
Ambient temperature, Ta − °C
Test Circuit and Equivalent Circuit Block Diagram
(Mitsumi)
(Sumida)
(Mitsumi)
(Sumida)
Unit (resistance: Ω, capacitance: F)
No.1521-2/5
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LA1185
VCCCharacteristic
– kHz
OSC
Total gain – dB
Specified test circuit
MIX gain – dB ∆f
Supply voltage, VCC–V
Temperature Characteristic Test Circuit
–0–mA
CC
– mVrms, I
OSC
Oscillation output, V
Band Characteristic
Local oscillation voltage
Conversion gain
Saturation output
Saturation output – dBµ
Local oscillation voltage – dBµ
Conversion gain – dB
Specified test circuit
with ANT B.P.F. removed
MIX gain – dB
Receiving frequency, fr− MHz
Oscillation frequency, f
OSC
– MHz
65 dBµ sensitivity – dBµ
–mA
CC-O
Current dissipation, I
Temperature Characteristic
65 dBµ sensitivity
Ambient temperature, Ta − °C
– dBµ
O-100
V
– MHz
OSC
Oscillation frequency, f
Unit (resistance: Ω, capacitance: F)
No.1521-3/5
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LA1185
Sample Application Circuit: LA1185 + LA1260 US band
AM section
Output – dBm
LA185+LA1260 Overall Characteristic
Output fm= 400 Hz 30% mod
AM output f
LED lightning sensitivity 11.5dB
= 1 kHz
m
ANT input – dBµ
LA1185+LA1260 Band Characteristic
LED lightning sensitivity
0dB
= 100%
Unit (resistance: Ω, capacitance: F)
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
THD–%
Usable sensitivity S/N –30 dB input, – dBµ
Usable sensitivity
Saturation output
Remove 1st stage B.P.F. when testing
LED lightning sensitivity, 3 dB L.S.
Receiving frequency, fr– MHz
Saturation output – mVrms
No.1521-4/5
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LA1185
No products described or contained herein are intended for useinsurgicalimplants, 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 loss.
Anyone purchasing any products described or contained herein for an above-mentioned use shall:
1 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:
2 Not impose any responsibility 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 August, 1996. Specifications and information herein are subject to change without notice.
No.1521-5/5
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