LA1800
Ordering number : EN1844C
FM/AM Single-Chip Radio
Monolithic Linear IC
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
12798HA (KT)/D101TH/N03TA/9037AT/7095MW, TS No.1844-1/8
Functions
FM : Front end, low-pass filter, IF amp, quadrature
detector, muting.
AM : RF amp, detector.
AM : AF driver (earphone driver).
Features
Minimum number of external parts required : One tuning
circuit each for FM, AM
Low current dissipation : 5.6mA/FM, 3.2mA/AM
Low-voltage operation : V
CC
min=2.5V
Specifications
Maximum Ratings
at Ta=25C
Parameter
Symbol
Conditions
Ratings
Unit
Maximum supply voltage
V
CC
max
Pin 3
6.0
V
Allowable power dissipation
Pd max
200
mW
Operating temperature
Topr
20 to +70
C
Storage temperature
Tstg
40 to +125
C
Operating Conditions
at Ta=25C
Parameter
Symbol
Conditions
Ratings
Unit
Recommended operating voltage V
CC
3.0
V
Operating voltage range
V
CC
op
2.5 to 5.0
V
Operating Characteristics
at Ta=25C, V
CC
=3V, See Test Circuit
Parameter
Symbol
Conditions
Ratings
min
typ
max
Unit
[AM]
Current drain
Icco
3.6
5.5
mA
Pin 2 voltage
V
2
1.9
2.4
2.9
V
Pin 14 voltage
V
14
0.4
0.9
1.6
V
Pin 21 voltage
V
21
0.6
0.9
1.2
V
[FM]
Current drain
Icco
5.6
8.0
mA
Pin 2 voltage
V
2
1.9
2.6
2.9
V
Pin 4 voltage
V
4
1.7
2.3
2.9
V
Pin 5 voltage
V
5
1.7
2.3
2.9
V
Continued on next page.
Package Dimensions
unit : mm
3059-DIP22S
[LA1800]
SANYO : DIP22S
21.2
0.95
0.48
1.7
1.78
3.9max
0.51min
6.4
7.62
3.3
3.25
0.25
1
11
22
12
LA1800
No.1844-2/8
Continued from preceding page.
Parameter
Symbol
Conditions
Ratings
min
typ
max
Unit
Pin 6 voltage
V
6
1.1
1.7
2.3
V
Pin 7 voltage
V
7
1.1
1.7
2.3
V
Pin 8 voltage
V
8
1.1
1.7
2.3
V
Pin 9 voltage
V
9
1.9
2.6
2.9
V
Pin 10 voltage
V
10
1.8
2.5
2.9
V
Pin 13 voltage
V
13
0
0.6
V
Pin 14 voltage
V
14
0.5
1.0
1.7
V
Pin 16 voltage
V
16
1.6
2.3
2.9
V
Pin 17 voltage
V
17
1.6
2.3
2.9
V
Pin 19 voltage
V
19
0.6
0.86
14
V
Pin 20 voltage
V
20
0.6
0.86
14
V
[AF]
Pin 11 current
I
11
0.5
1.0
1.5
mA
Pin 12 voltage
V
12
0
0.5
V
[Reference characteristics]
Operating Characteristics
at Ta=25C, V
CC
=3V, See Test Circuit 2
Parameter
Symbol
Conditions
Ratings
min
typ
max
Unit
[AM : f
C
=1MHz, f
m
=400Hz]
Current drain
Icco
Quiescent
3.6
mA
Detection output
V
O
1
V
IN
=40dB, 30% mod
10
mV
V
O
2
V
IN
=70dB, 30% mod
100
mV
Signal to noise ratio
S/N
V
IN
=70dB, 30% mod
47
dB
[FM : f
C
=90MHz, f
m
=400Hz]
Current drain
Icco
Quiescent
5.6
mA
Input limiting sensitivity
3dBL.S.
3dB down, 30% mod
16
dB
Demodulation output
V
O
V
IN
=80dB, 30% mod
90
mV
Total harmonic distortion
THD
V
IN
=80dB, 30% mod
0.8
%
Signal to noise ratio
S/N
V
IN
=80dB
59
dB
[AF : f
m
=400Hz]
Voltage gain
VG
V
O
=50mV
24
dB
Total harmonic distortion
THD
V
O
=50mV
0.3
%
Note : 1. Current drain for FM, AM includes current of AF driver stage.
2. When handling the IC, be careful not to cause dielectric breakdown.
Ambient temperature, Ta C
Allowable power dissipation, Pd max mW
LA1800
No.1844-3/8
DC Test Circuit
AC Test Circuit
Unit (resistance :
, capacitance : F)
Equivalent Circuit Block Diagram
Unit (resistance :
, capacitance : F)
LA1800
No.1844-4/8
Sample Application Circuit
Sample Printed Circuit Pattern
(Cu-foiled side)
Unit (resistance :
, capacitance : F)
Unit (resistance :
, capacitance : F)
LA1800
No.1844-5/7
MW Superheterodyne Use
Unit (resistance :
, capacitance : F)
Variable capacitor 2LXT-L
Mitsumi
L1
HH-40947
Mitsumi
T1
HW-40217
Mitsumi
T2
HW-40194
Mitsumi
T3
HW-50005
Mitsumi
B.P.F.
SNY-074-2005 Sumida
Noise, AM-out, AF-out, THD Input
Input dB
Noise, AM-out, AF-out dBm
Total harmonic distortion, THD %
Noise
Input=80dB V13 min
LA1800
No.1844-6/8
Noise, AF-out Input
Input dB/m
Output, V
O
mV
Noise, AM-out, AF-out dBm
Total harmonic distortion, THD %
Supply voltage, V
CC
V
Current dissipation, I
CC
mA
AM Selectivity
THD V
O
AM Selectivity
FM V
CC
Characteristic
Response dB
FM V
CC
Characteristic
Response dB
AM Band Characteristic
Receiving frequency Hz
Sensitivity dB
Noise
Waveform distortion
increased
MW band
20mV sensitivity
10mV sensitivity
Output=20mV
const.
Gain 23dB
Output=50mV
Input=3.5mV
Supply voltage, V
CC
V
Quiescent noise, Demodulation output dBm
AM V
CC
Characteristic
Supply voltage, V
CC
V
Current drain, I
CC
mA
3dB limiting sensitivity dB
Detection output
Quiescent noise
LA1800
No.1844-7/8
AM V
CC
Characteristic
Supply voltage, V
CC
V
Detection output dBm
Superheterodyne System AM Characteristic
Response dB
Power V
CC
Characteristic
Supply voltage, V
CC
V
Gain dB
Superheterodyne System AM Characteristic
Maximum sensitivity dB/m
Total harmonic distortion, THD %
10mV sensitivity dB
Detection output
10mV sensitivity
THD=output 50mV
Gain
Tracing at 600, 1400kHz
Output=10mV const.
Superheterodyne System AM Characteristic
Maximum sensitivity dB/m
Supply voltage, V
CC
V
Unit (resistance :
, capacitance : F)
LA1800
No.1844-8/8
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:
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 January, 1998. Specifications and information herein are subject
to change without notice.
Superheterodyne System AM Characteristic
Noise, Detection output dBm
Total harmonic distortion, THD %
Input dB/m
Detection output
Noise
Unit (resistance :
)
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