AUK SL1018

SL1018
Semiconductor
FM IF SYSTEM
Description
The SL1018 has versatile muting characteristics and allows receiver designers to realize the
muting performance according to their design concept.
Functions
• FM IF Amplifier/Limiter • Quadrature Detector • AFC Clamp • AGC Drive
• AF Mute Amplifier • Signal Meter Drive • DC Level Detector
Features
• Adjustable muting sensitivity
• Soft muting function
• Variable maximum muting attenuation (6dB~40dB)
• Variable muting slope with respect to input signal level
• High limiting sensitivity with muting off
• Good S/N ratio
• Clamped AFC output • Delayed AGC output for front end circuit
• Recommended supply voltage: VCC =8V
• Operating supply voltage range: VCC =7.5V~16V
• Low distortion • Good AMR
Application
• FM car stereo receiver
Ordering Information
Type NO.
Marking
SL1018
Package Code
SL1018
ZIP16
Outline Dimensions
unit :
mm
2 • φ3.05 • 0.13d
φ1.52 • 0.13d
24.38
45o
3.05
15.24
1.02
5.49
7.11
1.52
12.12
0.51
1.78
3.23
0.254
1.50
0.51
φ1.27 •0.31d
3.00
22.48
3.0
3.0
KSI-W016-000
1
SL1018
Absolute Maximum Ratings
(Ta = 25°C)
Characteristics
Symbol
Rating
Unit
Supply Voltage
VCC
16
V
Supply Current
ICC
40
mA
Power Dissipation
PD
640
mW
Operation Temperature
Topr
- 20 ~ + 70
℃
Storage Temperature
Tstg
- 40 ~ + 125
℃
Block Diagram
IF
Out
Vcc
12
9
Quad
In
Vref
11
13
VOLTAGE
REGULATOR
IF
Input
1
2
2nd
Amp
1st
Amp
AFC
CLAMF
3rd
Amp
4th
Amp
5th
Amp
6th
Amp
QUADRATURE
DETECTOR
QUAD
LIMITER
Bias
3
LEVEL
DETECTOR
GND
LEVEL
DETECTOR
LEVEL
DETECTOR
INVERTER
7
HOLE
DETECTOR
DC
LEVEL
DETECTOR
AF
MUTE
Amp
8
5
AFC
AF
Output
Mute
Attenuation
Adj ust
4
AGC
DRIVE
16
AGC
SIGNAL
METER
DRIVE
15
Signal
METER
Output
MUTE
DRIVE
14
10
Mute
Drive
GND
KSI-W016-000
6
Mute
Input
2
SL1018
Test Circuit
Vcc(8V)
Vout
15KHz
12dB/oct
L.P.F
Icc
0.01uF
0.047uF
2
4
6
8
47K
0.047uF
22K
SW
V6
10
12
Mute
Drive(V14)
0.047uF
2.2uH
+
4.7uF
VGC(V16)
R16
14
16
22K
100K
0.047uF
33pF
SL1018
0.47uF
1
3
5
7
9
11
13
15
300
L1
22uH
330
0.047uF
R15
22K
2.7K
10K
FM SSG
75
0.047uF
0.047uF
R8
4.7uF
+
5.1K
100K
L2
L3
10K
33pF
R7
Signal
METER
Output(V15)
0.047uF
0.047uF
AFC
Vref
Electrical Characteristics
(Unless otherwise specified, Ta = 25℃, Vcc = 8V, f = 10.7MHz, VIN = 100dBμ , fm = 400Hz, Δ f = ±75kHz )
Characteristics
Symbol
Test Condition
Typ.
Max.
Unit
15
21
27
mA
Quiescent Current
ICCQ
Supply Current
ICC
－
20
25
30
mA
Detector Output Level
VOD
－
200
260
320
mVrms
－
25
29
dBμ
22
26
32
dBμ
Input Limiting Sensitivity
Muting Sensitivity
VIN (lim)
Quiescent
Min.
VOD = 3dB down
VIN(mute) V14 = 2V
Total Harmonic Distortion
THD
－
－
0.05
0.2
%
Signal to Noise Ratio
S/N
－
72
78
－
dB
Muting Attenuation (1)
MA1
V6 = 2V (22kΩ )
10
15
20
dB
Muting Attenuation (2)
MA2
V6 = 5V (22kΩ )
24
28
32
dB
Muting Bandwidth
MBW
V14 = 2V
140
210
370
kHz
AM Rejection Ratio
AMR
AM 1kHz 30% mod
50
63
－
dB
Signal Meter Output 1
VSM1
Quiescent
0
0.1
0.3
V
KSI-W016-000
3
SL1018
Electrical Characteristics(continued)
Characteristics
Symbol
Test Condition
Min.
Typ.
Max.
Unit
Signal Meter Output 2
VSM2
VIN = 50dBμ
0.8
1.4
2
V
Signal Meter Output 3
VSM3
VIN = 70dBμ
1.6
2.4
3.2
V
Signal Meter Output 4
VSM4
VIN = 100dBμ
4.5
5.3
6
V
Muting Drive Output 1
VMD1
Quiescent
3.5
4.2
5
V
Muting Drive Output 2
VMD2
VIN = 100dBμ
0
0
0.3
V
3.5
4.1
4.5
V
0
0.02
0.3
V
AGC Output 1
VO (AGC)1
Quiescent
AGC Output 2
VO (AGC)2
VIN = 100dBμ
Offset Voltage 1
VOS1
Quiescent, Pin 7 to 13
-0.25
0
+0.25
V
Offset Voltage 2
VOS2
Quiescent, Pin 8 to 13
-0.5
0
+0.5
V
Information On Muting Characteristics
The muting operation is performed by an AF mute amplifier, the gain of which decreases
with the increased gain control current applied to the pin 6. (The control current is supplied
by a muting drive circuit and change continuously the gain of an AF mute amplifier) But the
gain does not decrease further when the control current reaches approximately 120 ㎂
or
higher. The lower limit of the gain under this condition depends on a resistor connected
between the pin5 and the ground. And the more the resistance increases, the more the
gain decreases. Thus the maximum attenuation will be set by connecting the resistor
between the pin5 and the ground. Fig.1 shows the muting attenuation with different R5
between the pin5 and the ground.
P I N6 C u r r e n t I 6 (u A )
0
SL1018
SL1018
8
5
R5
AF Ou tpu t:
-10
AF Output (dB)
6
I6
-20
100
200
R 5 = 20KΩ
R 5 = 100KΩ
-30
- Fig. 1 -
KSI-W016-000
4
SL1018
Information On Muting Characteristics (continued)
Since the pin6 is connected to the base of the emitter ground
transistor through a protection resistor of 500Ω in series as shown
I6
Fig.2. the voltage between pin6 and ground is about 0.7V when
6
the control current is applied. Actually, the muting operation is
accomplished by applying a muting drive output voltage(pin14) to
500
the pin6 through a high resistance(20kΩ )
The muting drive output is composed of three output devices:
① Hole Detector output which develops a voltage when C/N
500
(carrier-to-noise ratio) is lower than weak signal input conditions.
② A reversed output of the signal meter drive output.
③ A bandwidth limited muting drive output which develops a
- Fig. 2 -
voltage when the AFC output becomes higher than ±VBE during
tuning-off operation. All these output are led to an OR circuit and
the output is developed at pin14.
The inverted output of the signal meter drive output is obtained as shown Fig. 3.
Vr
In v e r t e r
V cc
In v e rt e r
IL = IO + I1 - a I2
Io : O ffs e t
IL
RL
a I2
I1
I1
I1
In v e r t e r
IO
I2
15
S ignal
Me t e r
Ou tpu t
14
16
R15
AGC
Ou tpu t
R16
Mu t i n g
De t e c t o r
Ou tpu t
-Fig. 3By Fig. 3, V14 is given by V14 = Vr－(IO + I1 -al2)RL－VBE. Conditions are Vr=4.9V, IO ≅ 0.2
mA, a ≅ 2, RL=22kΩ , VBE=0.7V, I1=V15/R15 , I2=V16/ R16, where V16 is a constant equal to
4.1V(Typ.) for medium or lower signal input levels where the muting drive output is
required. Since the V15 increase proportionally to the increase of the input signal level, I1
will also increase, and the V14 will decrease. Thus the required muting drive output can be
obtained by selecting proper values of R15 and R16 . Increasing R15 makes the slope of the
curve for the muting drive output vs. antenna signal input decrease, or decreasing the R15
increase the slope of the curve.
KSI-W016-000
5
SL1018
Information On Muting Characteristics (continued)
Furthermore, varying the value of a resistor connected between the pin14 and pin16
changes the value of the muting control current required to obtain the same muting drive
output, accordingly a slope of curve for muting attenuation vs. antenna signal input level is
also changed. Fig. 4 shows these characteristics investigated by using an actual receiver.
The method to adjust the muting circuit is to set the signal input level required to actuate
the muting circuit with the R16 , to adjust the slope of the curve for the muting attenuations
vs. antenna signal input with the R15 and to adjust the maximum muting attenuation
determined by setting the noise level at no signal.
The slope of the curve for the muting attenuation vs. antenna signal input level can also be
adjusted by the resistor connected between the pin14 and the pin6. However, if the resistor
is too high, the muting control current does not flow into pin6 over than 120 ㎂ even
though the maximum muting drive output(V14) is applied, namely the muting attenuation
doesn't reach its maximum value. A recommended value of the resistor between the pin14
Pin14,15,16 Voltage(V)
and the pin6 is about 22kΩ.
5
V
4
15
3
2
1
V
14
V
16
0
A NT I n p u t
-Fig.4-4 - Fig.
KSI-W016-000
6
SL1018
V
- △f
14
MA - V
5
MA(dB)
V I N = 100d Bu
f I N = 10.7 MHz
3
2
1
0
-200
-100
0
100
10
Muting Attenuation
4
20
V c c = 8V
P I N5-G ND=100KΩ
30
0
200
1
V
OD,
10
A M R , T HD, S /N-V
V
O D (0d B=260mV
V
IN
V14, V15, V16 (V)
-30
Pin Voltage
-40
-50
A MR
-60
-70
-80
T HD
S /N
20
40
60
80
100
I n p u t V o l t a g e V I N (d Bu )
0
14,
V
- V
IN
3
V
V
14
V
20
40
60
In pu t V olt a ge V
IN
- V
11
V
5
400
4
V14(V)
15
1
0
300
16
2
120
14
80
100
(d Bu )
120
3
Muting Drive Output
MBW(KHz)
Muting BandWidth
16
4
M BW - R 7
200
0
1K
V
5
(V )
5
500
100
15,
4
6
f I N =10.7MHz ,u n mo d u l a t e d
V c c = 8V
f = 10.7 MHz
400Hz -75KHz d e v .
-20
3
6
r ms )
0
-10
2
P in 6 V oltage V
F r e q u e n c y De t u n e f (KHz )
Detector Output Level
VOD(mVrms)
AM Rejection Ratio AMR (dB)
Total Harmonic Distortion THD (dB)
Signal to Noise Ration S/N (dB)
(22K)
6
0
MA(dB)
BandWidth Muting Drive Output
V14(V)
Typical Performance Characteristics
V c c = 8V
V I N = 100d Bu
2
3
5 7 10K
2
3
5
7 100K
2
1
V c c = 8V
T a = 25 o C
f I N = 10.7MHz u n mo d u l a t e d
0
80
85
90
95
100
Q u adratu re S ignal V
R e s i s t a n c e R 7 (Ω)
KSI-W016-000
11
105
110
(d Bu )
7
SL1018
Typical Performance Characteristics (continued)
V
MA - V c c
VOUT(mVrms)
MA(dB)
Muting Attenuation
f I N =10.7M Hz
F M : 400H z -75KH z d e v .
20
Detector Output
M A1
M A2
30
40
6
8
10
12
14
S u p p l y V o l t a g e V c c (V )
V I N =100d Bu
f I N =10.7M Hz
F M : 400H z -75KHz d e v .
280
260
240
220
16
8
5
10
S /N - V c c
16
A MR - V c c
AM Rejection Ratio AMR (dB)
Signal to Noise Ratio S/N (dB)
14
68
78
76
V I N =100d Bu
f I N =10.7M Hz
F M: 400Hz -75KH z d e v .
74
72
6
8
10
12
14
V I N =100d Bu
f I N =10.7M Hz
F M: 400Hz -75KH z d e v .
A M:1KHz -30%
66
64
62
60
16
6
V
I N (l i m)
8
10
12
14
15
S u p p l y V o l t a g e V c c (V )
S u p p l y V o l t a g e V c c (V )
- V cc
V
30
I N (mu t e )
- V cc
30
f I N =10.7M Hz
F M: 400Hz -75KHz d e v .
f I N =10.7M Hz , u n mo d u l a t e d
VIN(mute)
28
26
28
26
Muting Sensitivity
VIN(lim)
12
S u p p l y V o l t a g e V c c (V )
80
Input Limiting Sensitivity
- V cc
300
0
10
OUT
24
22
6
8
10
12
14
24
22
6
16
S u p p l y V o l t a g e V c c (V )
8
10
12
14
16
S u p p l y V o l t a g e V c c (V )
KSI-W016-000
8
SL1018
SL1018
Application circuit
KSI-W016-000
9