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| Semiconductor SL1027P DUAL PREAMPLIFIER WITH ALC Description * The SL1027P is a monolithic integrated circuit consisting of two independent preamplifier with two built-in ALC, and it has quick stabilization during power supply input. Features * * * * * * * High voltage gain Excellent channel separation Low noise Direct motor drive obtained through SEPP output stage. Good ALC channel balance Operating supply voltage range : VCC = 5V ~13V Load resistance : RL > 680 Application * Stereo radio cassettes Ordering Information Type NO. SL1027P Marking SL1027 Package Code DIP14 Outline Dimensions unit : mm KSI-W021-000 1 SL1027P Maximum Ratings Supply Voltage Power Dissipation Operating Temperature Storage Temperature (Ta = 25C) Characteristics Symbol Vcc PD Topr Tstg Rating 14 600 - 25 ~ + 75 - 40 ~ + 125 Unit V mW Electrical Characteristics (Unless otherwise specified, Ta=25 , VCC=5V, f=1KHz, RL = 10K (PLAY), RL = 680 (REC)) Characteristics Quiescent Supply Current Open-loop Voltage Gain Closed-loop Voltage Gain Maximum Output Voltage Total Harmonic Distortion Input Resistance Equivalent Input Noise Voltage Channel Separation ALC Channel Balance ALC Width ALC Distortion Symbol ICCQ GVO GV VOM THD RIN VNI CHSEP ACB AW AD Test Condition PLAY REC THD = 1%, PLAY VO = 0.5V, PLAY B.P.F = 20Hz ~ 20KHz Rg = 2.2, PLAY Rg=2.2 VO= 0dBm,PLAY VIN=-20dBm,REC. VIN=-60dBm,REC. VIN=-20dBm,REC. Min. 0.9 21 40 35 - Typ. 4.5 85 40 58 1.2 0.1 30 1 50 0 45 0.5 Max. 10 1 2 2 2 Unit mA dB dB dB V % K uV dB dB dB % KSI-W021-000 2 SL1027P Block Diagram A MP 2 Ou tpu t 13 NF 2 & A MP 2 (-)I n p u t 11 A MP 2 + Bi a s Cir c u i t A LC2 A MP 2 (+)I n p u t 10 A LC 2 Ou tpu t 9 In pu t Bi a s V oltage 8 V CC 14 NULL 12 + A LC1 A MP 1 1 G ND 2 A MP 1 O u tpu t 3 NULL 4 NF 1 & A MP 1 (-)I n p u t 5 A MP 1 (+)I n p u t 6 A LC1 Ou tpu t 7 A LC In pu t Test Circuit 680 + 470u F SW2 2.2K S W 1.2 220u F 9 8 1 2 10K1 b C 20~20KHz B.P . SW6 A V c c (5V ) + SW4 2 56 S W 3 0.033u F 4.7K 10u F + 51K 22u F + 14 13 12 11 + 47u F 10 + 220u F SL1027 SL1027P 1 2 3 51K 22u F 56 4 + 5 + 4.7u F 2.2K 6 7 C 20~20KHz B.P . SW6 b + 10u F SW4 1 2 4.7K 0.033u F SW2 1 SG 2 10K 680 S W 5 680 4.7u F + + S W 5 680 4.7u F + 470u F + 4.7u F S W 1.1 300K KSI-W021-000 3 SL1027P Test Method MeasureSwitch Position Symment bol SW 1 SW 2 SW 3 SW 4 SW 5 SW 6 Location ICCQ GVO GV VOM THD 2 1 1 1 1 SW1-1 12 SW1-2 21 2 1 OFF ON OFF OFF OFF OFF OFF ON ON ON 1 1 1 1 1 OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF a, b a, b b b Test Method Read ammeter GVO = 20log(VO / VIN ) [dB] GV = 20log(VO / VIN ) [dB] Measure output voltage(VO) at THD=1% Measure distortion factor at VO=0.5V Measure crosstalk of amp 1,2 at output voltage VO = 0dBm Convert output noise voltage at 1KHz gain when Rg = 2.2K Input voltage range from when input voltage VIN =-60dBm until output voltage VO goes up 3dB Output voltage VO level difference of amp 1,2 when input voltage VIN = -20dBm is applied. Measure distortion factor when input voltage VIN = -20dBm is applied. CHSEP OFF ON 1 OFF OFF b VNI AW OFF OFF ON OFF 1 2 OFF ON ON OFF c b ACB AD 1 1 OFF OFF OFF OFF 2 2 ON ON OFF OFF b b Information of Operating 1. ALC Circuit The ALC circuit is consist of Q1, Q2 and some external components. The output level of amplifier is rectified by external circuits and this rectified DC level is applied to the ALC input terminal(Pin 7). V cc 6 7 Q1 Q2 1 4 + + + 5 + A MP 2 S ignal In pu t KSI-W021-000 4 SL1027P 2. Closed-loop Gain (f=1kHz) * Closed loop voltage gain GV=20log(Z1/Z3) (dB) * Playback amplifier gain GV=20log(R1/R3) (dB) in low frequency GV=20log(Z1/Z3) (dB) in high frequency * Recording amplifier gian GV=20log(R1/R3) (dB) 3. Oscillation When the closed-loop gain of amplifier is lowered, oscillation with occur. So the circuit should be compensated by connecting of 10pF between pin 3 and pin 2, and 0.03 in series with 10 to the load end. C1 Z3 R3 R2 C2 RL 4 + Z2 R1 + Z1 2 10u F 10p F 3 S ignal In pu t 10u F + 5 + A MP 51 4 1000p F 20u F 56 + 0.033u F 47K 10 0.033uF 2 10u F + RL KSI-W021-000 5 SL1027P Typical Performance Characteristics G VO - f 100 (dB) (dB) 100 Gv 80 F LA T 60 60 40 V c c =5V R L=10K CN F =470u F 20 2 3 5 100 2 3 5 1K Voltage Gain G NA B 40 20 V c c =5V R g =600 0 2 3 5 100 2 3 5 1K 80 GV - f VO Voltage Gain G V 23 5 10K 2 3 5 100K 2 3 5 10K 2 3 5 100K F r e q u e n c y f (Hz ) F r e q u e n c y f (Hz ) I C C Q -V c c (mA) 100 14 12 10 8 6 4 2 0 R g =0 R L=10K T HD,G v o -V c c R L=10K 10 Total Harmonic Distortion THD (%) 8 6 4 2 R L=10K 0 2 4 6 8 10 12 S u p p l y V o l t a g e V c c (V ) T HD-V o 2 V c c =5V R L=10K G v =40d B/1KHz 14 680 T HD Gvo 680 f =1KHz V o =0d B CN F =470u F 60 40 VO (dB) Voltage Gain G Quiescent Current I CCQ 80 0 2 4 6 8 10 12 14 16 S u p p l y V o l t a g e V c c (V ) A D,V o -V f =1KHz R L=680 5V ALC Distortion AD(%) Vo V c c =4V 6V IN 5 3 2 ALC Output Vo(V) 1.0 7 5 3 2 1.0 7 5 1KHz 0.1 2 3 5 7 1.0 2 3 3 2 -80 -70 -60 -50 -40 In pu t V ol t a ge V 6V -30 -20 I N (V 1.0 Total Harmonic Distortion THD (%) 7 5 3 100Hz 2 10KHz 0.1 7 5 3 2 V c c =4V 5V 0.1 7 5 -10 O u t p u t V o l t a g e V o (V ) ) KSI-W021-000 6 P 2.2K MIC R 3.3K + 680 4.7uF 10K Application Circuit Head 0.033uF 56 22uF + 4.7uF + + 220uF 10uF 51K + 4.7K 1000pF SP P PWR (R) AMP R Vcc 9 8 14 13 12 11 10 200 Tuner(R) + DBL1027 SL1027P SL1027 P 2.2K R 6 7 100uF Tuner(L) 1 2 3 4 5 KSI-W021-000 + + 51K 22uF + 4.7uF 10uF 0.033uF 4.7K 56 1000pF + + 3.3K 1uF 680 4.7uF 47uF P MIC PWR (L) AMP R 10K SP Head Meter 300K Bias OSC + SL1027P 7 |
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