SA1135
AM RADIO IC FOR DIGITAL TUNING SYSTEM
DESCRIPTION
The SA1135 is a high-performance AM electronic tuner IC. It is
especially suited for use in car radio and home stereo applications.
FEATURES
* Excellent cross modulation characteristics: Meets the requirements
for preventing not only adjacent-channel
interference but also
interference caused by all channels within broadcast band.
* Narrow-band signal meter output: Usable as auto search stop signal.
* Local oscillation buffer output: Facilitates designing of electronic
tuner system, etc.
* Good characteristics at high input: 130 dBµ input fm = 400 Hz 80%
mod THD = 0.4% typ.
* Low noise: Good S/N at medium input (56 dB typ.)
* Usable sensitivity
Device
SA1135
SA1135S
DIP-20-300-2.54
SOP-20-300-1.27
ORDERING INFORMATION
Package
DIP-20-300-2.54
SOP-20-300-1.27
APPLICATIONS
* Car radio , home stereo, etc
BLOCK DIAGRAM
ABSOLUTE MAXIMUM RATING
(T
amb
=25°C)
Characteristics
Maximum Supply Voltage
Output Voltage
Input Voltage
Symbol
V
CC
max
V
O
V
IN
Rating
16
24
5.6
Unit
V
V
V
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
REV:1.0
2005.02.01
Page 1 of 7
SA1135
(To be continued)
(Continued)
Characteristics
Current Drain
Flow-Out Current
Flow-Out Current
Allowable Power Dissipation
Operating Temperature
Storage Temperature
Symbol
I
CC
I
18
I
20
P
d
max
T
opr
T
stg
Rating
41
2
2
730
–20 to +70
-40 to +125
Unit
mA
mA
mA
mW
°C
°C
ELECTRICAL CHARACTERISTICS
(V
CC
=8V, f
r
=1MHz, f
m
=400Hz, T
amb
=25°C )
Characteristics
Recommended Supply Voltage
Operating Supply Voltage Range
Current Drain
Detection Output
Signal-To-Noise Ratio
Total Harmonic Distortion
Symbol
V
CC
V
CCop
I
CC1
I
CC2
V
O1
V
O2
S
/N
T
HD1
T
HD2
T
HD3
Signal Meter Output
Input At Signal Meter Output 1V
Local Oscillation Buffer Output
V
SM1
V
SM2
V
IN1
V
OSCBUF
Quiescent
130dBµ input
16dBµ input, 30% mod
74dBµ input, 30% mod
74dBµ input, 30% mod
74dBµ input, 30% mod
74dBµ input, 80% mod
130dBµ input, 80% mod
Quiescent
130dBµ input
V
SM
=1V
3.5
18.0
320
7.5
13.5
20.0
-29.0
-15.0
51.0
22.5
30.0
-25.0
-12.0
56.0
0.3
0.3
0.4
0
5.0
24.0
380
1.0
1.0
2.0
0.3
7.5
30.0
Test condition
Min.
Typ.
8
12
32.5
41.0
-21.0
-9.0
Max.
Unit
V
V
mA
mA
dBm
dBm
dB
%
%
%
V
V
dBµ
mVrms
REFERENCE CHARACTERISTICS
Characteristics
Usable Sensitivity
Symbol
Q.S.
Test condition
Input at S/N = 20 dB
(2SK315 IDDS = 11 mA)
Reception 1.0 MHz quiescent
Wide-Band AGC ON-State Input
Detection Output Variation
Local Oscillation Variation Within
Broadcast Band
∆VO
∆VOSC
VSM-BW1
Signal Meter Band *
VSM-BW2
Selectivity
IF Interference
Image Frequency Interference
IF. R.
IM. R.
Interference 1.4 MHz non-mod
at input for AMT.D. ON
Input 74 dBµ→130 dBµ
VOSCL – VOSCH
74 dBµ input, frequency at which
output is reduced to 1/2
74 dBµ input, frequency at which
output is reduced to 1/10
30 % mod
±10
kHz *
fr = 600 kHz *
fr = 1400 kHz *
0.2
15
±1.5
-4.5/+7
43
77.5
52.0
dB
mVrms
kHz
kHz
dB
dB
dB
82.0
dBµ
Min.
Typ.
25.0
Max.
Unit
dBµ
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
REV:1.0
2005.02.01
Page 2 of 7
SA1135
Note: *: Wide-band AGC OFF
PIN CONFIGURATIONS
OSCBUFOUT
DETOUT
IFAGCIN
SMOUT
SMfilter
20
19
18
17
16
15
14
13
12
11
SA1135
1
RFAGC
2
AGCIN1
3
RFAGCfilter
4
ANTdamping
5
GND1
6
AGCIN2
7
MIXOUT
8
V
CC1
9
IFIN
10
IFOUT
PIN DESCRIPTIONS
Pin no.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Pin name
RFAGC
AGCIN1
RFAGCfilter
ANTdamping
GND1
AGCIN2
MIXOUT
VCC1
IFIN
IFOUT
DETIN
GND2
DETOUT
VCC2
SMfilter
SMOUT
IFAGCIN
VREG
OSC
OSCBUFOUT
RFAGC
Detecting an undesired signal outside the RF band
Connected to capacitor
ANTdamping
Gnd of RFAGC, OSC, MIX
Detecting an undesired signal within the RF band
Out of mixer
Vcc of RFAGC, OSC, MIX
In of IF amp
Out of IF amp
In of detector
Gnd of IF, DET, SM
Out of detector
Vcc of IF ,DET ,SM
Connected to resistor and capacitor
Out of s-meter
In of IF AGC
Regulator voltage
Osc
Out of osc buffer
Description
FUNCTION DESCRIPTION
1. Double –balanced differential MIX can prevent spurious interference and IF interference.
2. Oscillation with ALC output is stabilized at a low level (380mVrms) for varactor diode.
3. IF amplifier and IF AGC
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
DETIN
VREG
GND2
V
CC2
OSC
REV:1.0
2005.02.01
Page 3 of 7
SA1135
4. RF wide –band AGC
5. SM output is able to be used as auto search stop signal
6. Local OSC buffer output facilitates designing of electronic tuner system
TEST CIRCUIT 1
(V
CC
=8v, f
r
=1MHz, f
m
=400Hz Unit (resistance:Ω, capacitance: F))
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
REV:1.0
2005.02.01
Page 4 of 7
SA1135
TEST CIRCUIT 2
(V
CC
=8V, f
r
=1MHz, f
m
=400Hz)
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
REV:1.0
2005.02.01
Page 5 of 7
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