SA2111C
3V AM/FM +MPX TUNER IC(FOR MECHANICAL TUNING)
DESCRIPTION
The SA2111C is AM/FM single-chip tuner IC, which is designed for
portable radios and 3V head phone radios. It is suitable for digit tuning
system, and FM local oscillation voltage is set up low relativity, for NEW
FCC.
SSOP-24-300-0.65
SSOP-24-300-1.0
FEATURES
* Operating supply voltage range: V
CC
=1.8~7V (T
amb
=25°C)
* AM detector coil, FM IFT, IF coupling condenser are not needed.
* For adopting ceramic discriminator, it is not necessary to adjust the
FM quad detector circuit.
* Built-in FM MPX VCO circuit
* Built-in varactor diode for AFC
* Built-in AM low cut circuit
* Low supply current. (V
CC
=3V, T
amb
=25°C)
I
CCq
(FM)=9.0mA (Typ.)
I
CCq
(AM)=5.0mA (Typ.)
Note: Handle with care to prevent devices from deteriorations by
ESD.
SOP-24-375-1.27
SDIP-24-300-1.778
ORDERING INFORMATION
Device
SA2111C
SA2111CS
SA2111CA
SA2111CB
Package
SDIP-24-300-1.778
SSOP-24-300-0.65
SOP-24-375-1.27
SSOP-24-300-1.0
BLOCK DIAGRAM
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
Rev: 1.1
2005.10.26
Page 1 of 10
SA2111C
ABSOLUTE MAXIMUM RATINGS
(T
amb
=25°C)
Characteristic
Supply Voltage
LED Current
LED Voltage
Power Dissipation
Operating Temperature
Storage Temperature
Symbol
V
CC
I
LED
V
LED
P
D
(note)
T
opr
T
stg
Value
8
10
8
1200
-20~+70
-40~+125
Unit
V
mA
V
mW
°C
°C
Note: Derated above Tamb=25°C in the proportion of 9.6mW/°C for SA2111C.
ELECTRICAL CHARACTERISTICS
(Unless otherwise specified, T
amb
=25°C, V
CC
=3V, F/E : f=98 MHz,
fm=1 kHz , FM IF : f=10.7 MHz,
∆f
=±22.5 kHz, fm= 1 kHz, AM : f=1 MHz, MOD=30%, fm=1 kHz, MPX: fm=1kHz)
Characteristics
Supply Current
Input Limiting Voltage
Local OSC Voltage
Input Limiting Voltage
Recovered Output Voltage
FM
IF
Signal To Noise Ratio
Total Harmonic Distortion
AM Rejection Ration
LED On Sensitivity
Soft Mute Attenuation
Gain
Recovered Output Voltage
AM
Signal To Noise Ratio
Total Harmonic Distortion
LED On Sensitivity
Pin (18) Output Resistance
Input Resistance
MPX
Output Resistance
Max. Composite Signal Input
Voltage
Symbol
I
CC
(FM)
I
CC
(AM)
V
in
(lim)
V
OSC
Test Condition
V
in
=0, FM mode
V
in
=0, AM mode
-3dB limiting
F
OSC
=108.7MHz
Min.
--
--
--
--
35
90
--
--
--
40
--
18
50
--
--
23
--
--
--
--
--
Typ.
9
5
7
105
40
105
65
0.2
50
45
20
35
70
41
0.7
28
0.75
15.5
55
5
700
Max.
12.5
7.5
--
--
45
120
--
--
--
50
--
70
90
--
--
33
--
--
--
--
--
Unit
mA
dBµV
EMF
mVrms
dBµV
EMF
mV
rms
dB
%
Db
dBµV
EMF
dB
mV
rms
mV
rms
dB
%
dBµV
EMF
kΩ
kΩ
kΩ
mV
rms
F/E
Vin(lim) IF -3dB limiting
V
OD
S/N
THD
AMR
V
L
MUTE
GV
VOD
S/N
THD
V
L
R18
R
IN
R
OUT
V
in
MAX
V
in
=80dBµV EMF
V
in
=80dBµV EMF
Vin
=80dBµV
EMF
V
in
=80dBµV EMF
IL
=1mA
V
in
=0
V
in
=25dBµV EMF
V
in
=60dBµV EMF
V
in
=60dBµV EMF
V
in
=60dBµV EMF
I
L
=1mA
FM mode
AM mode
--
--
L+R=90%, P=10%, fm=1Khz,
(STEREO) THD=3%
(To be continued)
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
Rev: 1.1
2005.10.26
Page 2 of 10
SA2111C
(Continued)
Characteristics
Separation
MPX
Total
Monaural
Harmonic
Distortion Stereo
Voltage Gain
Channel Balance
Stereo
LED
MPX Sensitivity
ON
OFF
Symbol
Sep
Test Condition
L+R=180mV
rms
,
P=20mV
rms
fm=100Hz
fm=1kHz
fm=10kHz
Min.
--
35
--
--
--
-2.5
-1.5
--
Typ.
45
45
45
0.3
0.3
-1
0
8
6
2
±8
80
Max.
--
--
--
--
Unit
dB
THD
V
in
=200mV
rms
(MONAURAL)
THD
L+R=180mV
rms
, P=20mVrms
(STEREO)
GV
C.B.
V
L
(ON)
V
L
(OFF)
V
H
C.R.
S/N
Pilot input
To LED turn off from LED turn
on
P=20mV
rms
--
V
in
=200mV
rms
V
in
=200mV
rms
%
--
0.5
1.5
12
--
--
--
--
mV
rms
dB
dB
3
--
--
--
Stereo LED Hysteresis
Capture Range
Signal To Noise Ratio
mV
rms
%
dB
PIN CONFIGURATION
PIN DESCRIPTION
Pin No.
1
2
3
4
5
6
7
Symbol
FM-RF IN
RF GND
AM LOW CUT
MIX OUT
AGC
V
CC
AM IF IN
FM-RF INPUT
GND for FM RF, FM OSC stage
AM LOW FREQUENCY CUT DOWN
FM & AM MIX OUTPUT
AUTOMATIC GAIN CONTROL
VCC for AM, FM IF, FM MPX stage
AM IF INPUT
(To be continued)
Description
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
Rev: 1.1
2005.10.26
Page 3 of 10
SA2111C
(Continued)
Pin No.
8
9
10
11
12
13
14
15
GND
Symbol
FM IF IN
TUN LED
ST LED
QUAD
R-OUT
L-OUT
LPF1
FM IF INPUT
Description
GND for AM, FM IF, FM MPX stage
tuning LED
Stereo LED
FM QUAD. Detector
R-channel Output
L-channel Output
•
LPF terminal for synchronous detector
•
VCO stop terminal V15=VCC→VCO STOP
•
LPF terminal for phase detector
•
Bias terminal for AM/FM SW circuit
V16=VCC→AM
V16=OPEN→FM
MPX INPUT
FM & AM DETECT OUTPUT
AUTO FREQUENCY CONTROL
AM OSC
FM OSC
VCC for FM OSC stage
FM RF OUTPUT
AM RF INPUT
16
LPF2
17
18
19
20
21
22
23
24
MPX IN
DET OUT
AFC
AM OSC
FM OSC
RF V
CC
FM RF OUT
AM RF IN
FUNCTION DESCRIPTION
Application note:
1.
AM low-cut circuit
When pin3 is open, no AF signal can pass through the AMP stage because of the common mode.
When the value of C3 that connected to pin3 is over 1uF, all AF signal can pass through the AMP stage.
The cut-off frequency fL is determined by the internal resistance 22kΩ (Typ.) and the external capacitor C3 as
below:
f
L
=
2x
1
3
x 22 x 10 x C3
(Hz)
It is possible to reduce the recovered output level at AM mode, by additional resistance between the pin (3)
and GND line.
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
Rev: 1.1
2005.10.26
Page 4 of 10
SA2111C
2.
FM detection circuit
The detection coil can take replace the ceramic discriminator in the FM detection circuit. Recommended circuit
and recommended coil are as follows. In this case, please take care that Vin (lim) falls a little.
TEST CIRCUIT
(1)
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
Rev: 1.1
2005.10.26
Page 5 of 10
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