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 = 25C
Parameter
Symbol
Conditions
Ratings
Unit
Maximum supply voltage
V
CC
max
8
V
Maximum pin voltage
V
3-5
12
V
V
6-5
V
CC
+ 0.8
V
Allowable power dissipation
Pd max
Ta
%
80C
150
mW
Operating temperature
Topr
20 to +80
C
Storage temperature
Tstg
40 to +125
C
Operating Conditions
at Ta = 25C
Parameter
Symbol
Conditions
Ratings
Unit
Recommended supply voltage
V
CC
4.5
V
Operating voltage range
V
CC
op
1.5 to 8.0
V
Ordering number: EN1521D
Monolithic Linear IC
LA1185
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
Operating Characteristics
at Ta = 25C, V
CC
= 4.5 V, fr = 108 MHz, f
OSC
= 118.7 MHz,
See specified Test Circuit
Parameter
Symbol
Conditions
min
typ
max
Unit
Current dissipation
I
CC
Quiescent
5.5
8.0
mA
Output saturation voltage
Vo
100 dB
95
115
135
mVrms
Local oscillation voltage
V
OSC
V
CC
= 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
-
m
W
Ambient temperature, Ta - C
(Sumida)
(Mitsumi)
(Mitsumi)
(Sumida)
Unit (resistance:
, capacitance: F)
LA1185
No.1521-2/5
Temperature Characteristic Test Circuit
MIX
gain
d
B
f
OSC
kHz
T
otal
gain
d
B
Specified test circuit
Supply voltage, V
CC
V
Oscillation
output,
V
OSC
m
V
rms,
I
CC
0m
A
Band Characteristic
Local oscillation voltage
Conversion gain
Saturation output
Specified test circuit
with ANT B.P.F. removed
Conversion
gain
d
B
Receiving frequency, f
r
- MHz
Oscillation frequency, f
OSC
MHz
Saturation
output
dB
Local
oscillation
voltage
dB
MIX
gain
d
B
V
CC
Characteristic
65
dB
sensitivity
dB
Current
dissipation,
I
CC-O
m
A
Temperature Characteristic
65 dB sensitivity
Ambient temperature, Ta - C
V
O-100
dB
Oscillation
frequency
,
f
OSC
MHz
Unit (resistance:
, 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:
, capacitance: F)
LA185+LA1260 Overall Characteristic
Output
dBm
LED lightning sensitivity 11.5dB
Output f
m
= 400 Hz 30% mod
AM output f
m
= 1 kHz
ANT input dB
T
H
D%
0 dB
= 100%
LA1185+LA1260 Band Characteristic
Usable
sensitivity
S/N
30
dB
input,
dB
LED
lightning
sensitivity
,
3
d
B
L.S.
LED lightning sensitivity
Usable sensitivity
Saturation output
Remove 1st stage B.P.F. when testing
Receiving frequency, f
r
MHz
Saturation
output
m
V
rms
LA1185
No.1521-4/5
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 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.
LA1185
No.1521-5/5
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