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 : VCCmin=2.5V
Specifications
Maximum Ratings
at Ta=25°C
Parameter Symbol Conditions Ratings Unit
Maximum supply voltage VCCmax 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=25°C
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=25°C, 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
1.71.78
3.9max
0.51min
6.4
7.62
3.3
3.25
0.25
111
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=25°C, V
CC
=3V, See Test Circuit 2
Parameter Symbol Conditions
Ratings
min typ max
Unit
[AM : fC=1MHz, fm=400Hz]
Current drain Icco Quiescent 3.6 mA
Detection output VO1 VIN=40dBµ, 30% mod 10 mV
VO2 VIN=70dBµ, 30% mod 100 mV
Signal to noise ratio S/N VIN=70dBµ, 30% mod 47 dB
[FM : fC=90MHz, fm=400Hz]
Current drain Icco Quiescent 5.6 mA
Input limiting sensitivity –3dBL.S. 3dB down, 30% mod 16 dBµ
Demodulation output V
O
VIN=80dBµ, 30% mod 90 mV
Total harmonic distortion THD VIN=80dBµ, 30% mod 0.8 %
Signal to noise ratio S/N VIN=80dBµ 59 dB
[AF : fm=400Hz]
Voltage gain VG VO=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 : Ω, capacitance : F)
Equivalent Circuit Block Diagram
Unit (resistance : Ω, capacitance : F)
LA1800
No.1844-4/8
Sample Application Circuit
Sample Printed Circuit Pattern
(Cu-foiled side)
Unit (resistance : Ω, capacitance : F)
Unit (resistance : Ω, capacitance : F)
LA1800
No.1844-5/7
MW Superheterodyne Use
Unit (resistance : Ω, 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 – dBµ
Noise, AM-out, AF-out – dBm
Total harmonic distortion, THD – %
Noise
Input=80dBµ V13 min
LA1800
No.1844-6/8
Noise, AF-out – Input
Input – dB/m
Output, VO– mV
Noise, AM-out, AF-out – dBmTotal harmonic distortion, THD – %
Supply voltage, VCC– V
Current dissipation, I
CC
– mA
AM Selectivity
THD – V
O
AM Selectivity
FM V
CC
Characteristic
Response – dB
FM VCCCharacteristic
Response – dB
AM Band Characteristic
Receiving frequency – Hz
Sensitivity – dBµ
Noise
Waveform distortion
increased
MW band
20mV sensitivity
10mV sensitivity
Output=20mV
const.
Gain 23dB
Output=50mV
Input=3.5mV
Supply voltage, VCC– V
Quiescent noise, Demodulation output – dBm
AM VCCCharacteristic
Supply voltage, VCC– V
Current drain, I
CC
– mA
–3dB limiting sensitivity – dB
Detection output
Quiescent noise
LA1800
No.1844-7/8
AM VCCCharacteristic
Supply voltage, VCC– V
Detection output – dBm
Superheterodyne System AM Characteristic
Response – dB
Power VCCCharacteristic
Supply voltage, VCC– V
Gain – dB
Superheterodyne System AM Characteristic
Maximum sensitivity – dB/m
Total harmonic distortion, THD – %
10mV sensitivity – dBµ
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, VCC– V
Unit (resistance : Ω, 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 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 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 : Ω)
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