SANYO LA1800 Datasheet
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)
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