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PDF S1A0427B01 Data sheet ( Hoja de datos )
| Número de pieza | S1A0427B01 | |
| Descripción | AM/FM 1 CHIP RADIO | |
| Fabricantes | Samsung semiconductor | |
| Logotipo |  |
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AM/FM 1 CHIP RADIO
S1A0427B01
INTRODUCTION
The S1A0427B01 is a monolithic integrated circuit designed for
portable AM/FM radios or AM/FM clock radios.
16−DlP−300A
FUNCTIONS
• AM RF & MIX
• AM AGC
• AM/FM DET
• Regulator
• AM Local OSC
• AM/FM IF AMP
• Audio Power AMP
• FM AFC Control
FEATURE
• Portable AM/FM 1-chip radio
• Wide operating supply voltage range: VCC = 3V − 12V (Approximately )
(Depending on the internal regulator tolerance)
• Recommended operating suply voltage:
VCC = 4.5V − 9V
Vcc
4.5V
RL
8Ω O
6.0V
O
7.5V
O
9.0V
X
Line Operated
X
16Ω O O O O
X
45Ω O O O O
O
• When using the AC line as an internal shunt regulator mode, it is possible to use a low cost application without
a transformer (approximately 42mA)
• IF AMP gain is determined by the DC voltage appearing at IC Pin 16.
• Power output: PC = 0.28W (Min.) at THD = 10% (Vcc = 5.5V/8Ω).
ORDERING INFORMATION
Device
S1A0427B01-D0B0
Package
16−DlP−300A
Operating Temperature
20°C − +70°C
1
1 page  
AM/FM 1 CHIP RADIO
S1A0427B01
APPLICATION INFORMATION
— EXTERNAL COMPONENTS
Part
Number
R5
R7
R8
C2
C4
C7
C9
C10
C11
C12
C13
C14
C15
C16
C17
Purpose
Am gain Control
FM detector
damper
FM gain adjust
IF bypass
IF filter
AM bypass
Detector filter
Audio coupling
Audio Input High-
cut
Ripple filter
Audio output
coupling
Power line filter
FM detector
phase-shift
High freq.
(IF) bypass
AN AGC time
constant and high
frequency (IF)
bypass
Typical
47kΩ
(33K − ∞ )
4.7kΩ
470Ω
0.022µF
0.022µF
0.047µF
0.01µF
0.022µF
0.001µF
220µF
470µF
470µF
10pF
0.047µF
0.047µF
Influence
Smaller Than Typ
Greater Than Typ
Low AM gain
AGC Distortion increase,
High gain
Low detector output, stable IF gain,
low FM gain
Sharp IF AMP curve
Low FM gain
High gain, but noise
increase
Should not be less than 0.005µF
High IF Gain,
S/N ratio degrade
Removal may cause IF oscillation No influence
Low gain
Using over 1 will cause
FM distortion at small
signal
Unstable IF AMP oscillation
Poor FM frequency
response
Lower sensitivity, poor low frequency Bass boost affects
response
de-emphasis curve
Audio oscillation
Poor response
Poor frequency response & Low gain Improve AC Hum
Poor low frequency response
Can achieve optimum
output power
Poor AC Hum
Improve AC Hum
Narrow IF bandwidth
Wide IF bandwidth
Removal will cause fm oscillation
No influence
Charging not recommended
−
5
5 Page 
AM/FM 1 CHIP RADIO
APPLICATION CIRCUIT 2
S1A0427B01
11
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet S1A0427B01.PDF ] | |
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