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Silan Microelectronics

SA1021 Datasheet Preview

SA1021 Datasheet

FM RADIO RECEIVER

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SA1021
FM RADIO RECEIVER FOR PORTABLE SYSTEM
DESCRIPTION
The SA1021 integrated radio receiver circuit is for portable radios,
stereo as well as mono, where a minimum of periphery is important in
terms of small dimensions and low cost. It is fully compatible for
applications using the low-voltage micro tuning system (MTS). The IC
has a frequency locked loop (FLL) system with an intermediate
frequency of 76kHz. The selectivity is obtained by active RC filters.
The only function to be tuned is the resonant frequency of the
oscillator.Interstation noise as well as noise from receiving weak
SOP-16-225-1.27
signals is reduced by a correlation mute system.
Special precautions have been taken to meet local oscillator
radiation requirements. Because of the low intermediate frequency,
low pass filtering of the MUX signal is required to avoid noise when
receiving stereo. 50kHz roll-off compensation, needed because of the ORDERING INFORMATION
low pass characteristic of the FLL, is performed by the integrated LF
amplifier. For mono application this amplifier can be used to directly
drive an earphone. The field-strength detector enables field-strength
dependent channel separation control.
Part No.
SA1021
* Mixer
Package
SOP-16-225-1.27
FEATURES
* RF input stage
* Local oscillator
* Frequency detector
* MTS compatible
* IF amplifier/limiter
* Mute circuit
* Loop amplifier
* LF amplifier for mono earphone
amplifier or MUX filter
* Internal reference circuit
* Field-strength dependent channel separation control facility.
www.DataSheet4U.com
BLOCK DIAGRAM
12 13
11 10 7 8
RF
OSC
5
AF
MIX
AMP
Buffer
IF Filter
VCO
MUTE
AMP
CLIM
6
Demodulation IF limiter
STAB
14 16
15 2 1
Fig.1 Block diagram
3
49
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
REV:2.0 2004.07.31
Page 1 of 7




Silan Microelectronics

SA1021 Datasheet Preview

SA1021 Datasheet

FM RADIO RECEIVER

No Preview Available !

SA1021
ABSOLUTE MAXIMUM RATINGS
Characteristics
Supply Voltage(pin 4)
Oscillator Voltage
Operating Ambient Temperature Range
Storage Temperature Range
Symbol
Vp= V4-3
V5-4
Tamb
Tstg
Min.
--
Vp-0.5
-10
-55
Max.
7.0
Vp+0.5
+70
+150
Unit
V
V
°C
°C
QUICK REFERENCE DATA
Characteristics
Supply Voltage (pin 4)
Supply Current
RF Input Frequency
Sensitivity (e.m.f.) for –3 dB Limiting
Signal Handling (e.m.f.)
AF Output Voltage
Symbol
Vp= V4-3
I4
frf
EMF
EMF
Vo
Conditions
Vp=3V
Sourceimpedance=75;Mut
e disabled
Source impedance=75
Min.
1.8
--
1.5
--
--
--
Typ.
--
6.3
--
4
200
90
Max.
6.0
--
110
--
--
--
Unit
V
mA
MHz
µV
mV
mV
THERMAL RESISTANCE
From junction to ambient
Rth j-a 300 K/W
DC ELECTRICAL CHARACTERISTICS(Tamb=25°C,Vp=3V , Unless otherwise specified)
Characteristics
Supply Voltage(pin 4)
Supply Current
Oscillator current
www.DataShVeoeltt4aUg.ecoamt Pin 13
Output Voltage(pin 14)
Symbol
Vp= V4-3
I4
I5
V13-3
V14-3
Test conditions
--
Vp=3V
--
--
--
Min.
1.8
--
--
--
--
Typ.
3.0
6.3
250
0.9
1.3
Max.
6.0
--
--
--
--
Unit
V
mA
µA
V
V
AC ELECTRICAL CHARACTERISTICS(MONO OPERATION)Tamb=25°C, Vp=3V,mea sured in Fig.5,
frf=96MHz modulated with f=±22.5kHz, fm=1kHz, EMF=0.3mV (e.m.f. at a source impedance of 75), r.m.s.
noise voltage measured unweighted (f=300Hz to 20kHz), Unless otherwise specified
Characteristics
Sensitivity
(e.m.f.)
for –3 dB limiting
for –3 dB muting
for (S+N)/N=26dB
Signal Handling (e.m.f.)
Signal-to-noise Ratio
Total Harmonic Distortion
Symbol
EMF
EMF
EMF
EMF
(S+N)/N
THD
Test conditions
See Fig.3
Muting disabled
THD<10%, f=±75kHz
--
f=22.5kHz
f=±75kHz
Min.
--
--
--
--
--
--
--
Typ. Max. Unit
4.0 -- µV
5.0 -- µV
7.0 -- µV
200 -- mV
60 -- dB
0.7 --
%
2.3 --
%
To be continued
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
REV:2.0 2004.07.31
Page 2 of 7


Part Number SA1021
Description FM RADIO RECEIVER
Maker Silan Microelectronics
Total Page 6 Pages
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