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LM1868 PDF даташит

Спецификация LM1868 изготовлена ​​​​«National Semiconductor» и имеет функцию, называемую «Radio System».

Детали детали

Номер произв LM1868
Описание Radio System
Производители National Semiconductor
логотип National Semiconductor логотип 

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LM1868 Даташит, Описание, Даташиты
www.DataSheet4U.com
February 1995
LM1868 AM FM Radio System
General Description
The combination of the LM1868 and an FM tuner will pro-
vide all the necessary functions for a 0 5 watt AM FM radio
Included in the LM 1868 are the audio power amplifier FM
IF and detector and the AM converter IF and detector
The device is suitable for both line operated and 9V battery
applications
Features
Y DC selection of AM FM mode
Y Regulated supply
Y Audio amplifier bandwidth decreased in AM mode
reducing amplifier noise in the AM band
Y AM converter AGC for excellent overload
characteristics
Y Low current internal AM detector for low tweet radiation
Block Diagram
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Note See table for coil data
C1995 National Semiconductor Corporation TL H 7909
Order Number LM1868N
See NS Package Number N20A
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TL H 7909 – 1
RRD-B30M115 Printed in U S A









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LM1868 Даташит, Описание, Даташиты
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Absolute Maximum Ratings
If Military Aerospace specified devices are required
please contact the National Semiconductor Sales
Office Distributors for availability and specifications
Supply Voltage (Pin 19)
15V
Package Dissipation
Above TA e 25 C Derate Based on
TJ(MAX) e 150 C and iJA e 60 C W
2 0W
Storage Temperature Range
Operating Temperature Range
Lead Temperature (Soldering 10 sec )
b55 C to a150 C
0 C to a70 C
260 C
Electrical Characteristics Test Circuit TA e 25 C VS e 9V RL e 8X (unless otherwise noted)
Parameter
Conditions
Min Typ Max Units
STATIC CHARACTERISTICS eAM e 0 eFM e 0
Supply Current
AM Mode S1 in Position 1
22 30 mA
Regulator Output Voltage (Pin 16)
35 39 48
V
Operating Voltage Range
4 5 15
DYNAMIC CHARACTERISTICS AM MODE
fAM e 1 MHz fmod e 1 kHz 30% Modulation S1 in Position 1 PO e 50 mW unless noted
Maximum Sensitivity
Measure eAM for PO e 50 mW
Maximum Volume
8
16 mV
Signal-to-Noise
Detector Output
eAM e 10 mV
40 50
dB
eAM e 1 mV
Measure at Top of Volume Control
40 60
85
mV
Overload Distortion
eAM e 50 mV 80% Modulation
2 10 %
Total Harmonic Distortion (THD)
eAM e 10 mV
11 2
%
DYNAMIC CHARACTERISTICS FM MODE fFM e 10 7 MHz fmod e 400 Hz Df e g75 kHz PO e 50 mW S1 in Position 1
b3 dB Limiting Sensitivity
15 45
mV
Signal-to-Noise Ratio
eFM e 10 mV
50 64
Detector Output
AM Rejection
MeFeMaseure10atmTVopDoffeVoDglua2m2tea5CSkoHhnzteroel t4U.co4m0
eFM e 10 mV 30% AM Modulation
40
60
50
Total Harmonic Distortion (THD)
eFM e 10 mV
11
DYNAMIC CHARACTERISTICS AUDIO AMPLIFIER ONLY f e 1 kHz eAM e 0 eFM e 0 S1 in Position 2
Power Output
THD e 10% RL 8X
VS e 6V
VS e 9V
250 325
500 700
Bandwidth
AM Mode PO e 50 mW
FM Mode PO e 50 mW
11
22
Total Harmonic Distortion (THD)
PO e 50 mW FM Mode
02
Voltage Gain
41
85
2
dB
mV
dB
%
mW
mW
kHz
kHz
%
dB
Typical Performance Characteristics (Test Circuit) All curves are measured at audio output
Quiescent Supply Current
vs Voltage
FM Limiting Characteristics
FM IF AM Rejection
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TL H 7909 – 2
2
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LM1868 Даташит, Описание, Даташиты
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Typical Performance Characteristics (Continued)
All curves are measured at audio output (Test Circuit)
AM Characteristics
Recovered Audio vs Supply
Gain vs Frequency Audio
Amplifier Only
Power Dissipation vs Power
Output RL e 8X
Power Dissipation vs Power
Out RL e 16X
Distortion vs Frequency
Audio Amplifier Only
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Test Circuit
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TL H 7909 – 3
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Note See table for coil data
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3
TL H 7909 – 4










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Номер в каталогеОписаниеПроизводители
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