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 • Soft muting function • Variable maximum muting attenuation (6dB~40dB) • Adjustable muting sensitivity • 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 • 0.13 d 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 Characteristics (Ta = 25° C) Unit Symbol Rating Supply Voltage VCC 16 V Supply Current ICC 40 mA Power Dissipation PD 640 mW Operation Temperature T opr - 20 ~ + 70 ℃ Storage Temperature T stg - 40 ~ + 125 ℃ Block Diagram IF Out Vcc 12 9 Quad In Vref 11 13 VOLTAGE REGULATOR IF Input 1 2 1st Amp 2nd Amp AFC CLAMF 3rd Amp 4th Amp 5th Amp 6th Amp QUAD LIMITER QUADRATURE DETECTOR AF MUTE Amp Bias 3 LEVEL DETECTOR GND LEVEL DETECTOR LEVEL DETECTOR INVERTER 7 HOLE DETECTOR DC LEVEL DETECTOR 8 5 AFC AF Output Mute Attenuation Adjust 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 V6 Mute Drive(V14) 0.047uF 22K SW 0.047uF 2.2uH 47K + 4.7uF VGC(V16) R16 22K 2 4 6 8 10 12 14 16 100K 0.047uF 33pF SL1018 0.47uF 1 3 5 7 9 11 300 13 15 L1 22uH 330 0.047uF R15 22K 2.7K 10K FM SSG Signal METER Output(V15) 0.047uF 0.047uF R8 4.7uF + 5.1K 100K L2 L3 10K 33pF R7 75 0.047uF 0.047uF AFC Vref Electrical Characteristics (Unless otherwise specified, Ta = 25℃, Vcc = 8V, f = 10.7MHz, VIN = 100dBμ, fm = 400Hz, Δf = ±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. PIN6 Current I 6 (uA) 0 SL1018 SL1018 200 8 5 AF Output: I6 -10 R5 AF Output (dB) 6 100 -20 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 ±VB E 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. V r Inverter Vcc Inverter I L = I O + I 1 - a I2 Io : O f f s e t IL RL a I2 I1 I1 I1 Inverter IO I2 15 Signal Meter Output 14 16 R15 AGC Output R16 Muting Detector Output -Fig. 3By Fig. 3, V14 is given by V14 = Vr－(IO + I1 -al2)RL －VBE. Conditions are V r=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(V 14) is applied, namely the muting attenuation doesn't reach its maximum value. A recommended value of the resistor between the pin14 and the pin6 is about 22kΩ. Pin14,15,16 Voltage(V) 5 V 4 15 3 2 1 V 14 V 16 0 ANT Input -Fig.4-4 - Fig. KSI-W016-000 6 SL1018 V - △f 14 M 5 V IN = 100dBu f IN = 10.7 MHz M A(dB) BandWidth Muting Drive Output 4 3 M A(dB) 2 1 0 -200 -100 V 0 OD, 100 Vcc = 8V PIN5-GND=100KΩ 30 0 1 10 V OD V IN 1 4 , V 1 5 , V 1 6 - V 5 (V) IN fIN = 1 0 . 7 M H z , u n m o d u l a t e d V14, V15, V16 (V) Vcc = 8V f = 10.7 MHz 400Hz-75KHz dev. -20 -30 -40 4 3 Pin Voltage V -50 AMR -60 -70 THD S/N 0 20 40 60 Input Voltage V BW - R 80 100 (dBu) V 14 16 2 V 15 1 120 0 20 40 60 Input Voltage V IN V 7 5 400 4 14 - V IN 80 100 (dBu) 120 11 V14(V) 500 300 3 200 2 0 1K 4 6 5 -10 100 3 6 (0dB=260mVrms) 0 -80 2 Pin 6 Voltage V Muting Drive Output MBW (KHz) (22K) 6 20 200 AMR, THD, S/N-V M Muting BandWidth - V 10 Frequency Detune f (KHz) Detector Output Level VOD(mVrms) AM Rejection Ratio AMR (dB) Total Harmonic Distortion THD (dB) Signal to Noise Ration S/N (dB) A 0 Muting Attenuation V14(V) Typical Performance Characteristics Vcc = 8V V IN = 100dBu 2 3 5 7 10K 2 Resistance R 3 7 5 7 100K 1 Vcc = 8V o Ta = 25 C fIN = 1 0 . 7 M H z u n m o d u l a t e d 0 80 85 90 95 Quadrature Signal V (Ω) KSI-W016-000 100 11 105 110 (dBu) 7 SL1018 Typical Performance Characteristics (continued) V MA - Vcc 0 VOUT(mVrms) M A(dB) 10 M A1 M A2 Detector Output Muting Attenuation 20 30 40 6 8 10 12 14 Supply Voltage Vcc (V) V IN =100dBu fI N = 1 0 . 7 M H z FM: 400Hz-75KHz dev. 280 260 240 220 16 5 8 10 78 66 AM Rejection Ratio AMR (dB) Signal to Noise Ratio S/N (dB) 68 76 V IN =100dBu fI N = 1 0 . 7 M H z FM: 400Hz-75KHz dev. 72 6 8 10 IN 16 12 14 V IN =100dBu fIN =10.7MHz FM: 400Hz-75KHz dev. AM:1KHz-30% 64 62 60 16 6 8 10 12 14 15 Supply Voltage Vcc (V) Supply Voltage Vcc (V) V 14 AMR - Vcc 80 74 12 Supply Voltage Vcc (V) S/N - Vcc (lim) - Vcc V 30 IN (mute) - Vcc 30 fIN =10.7MHz FM: 400Hz-75KHz dev. fIN=10.7MHz, unmodulated VIN (mute) 28 26 28 26 Muting Sensitivity VIN (lim) - Vcc 300 fIN =10.7MHz FM: 400Hz-75KHz dev. Input Limiting Sensitivity OUT 24 22 6 8 10 12 14 24 22 16 6 Supply Voltage Vcc (V) 8 10 12 14 16 Supply Voltage Vcc (V) KSI-W016-000 8 SL1018 SL1018 Application circuit KSI-W016-000 9