DBL1027 DAEWOO | Alldatasheet

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DUAL PREAMPLIFIER WITH ALC 14DIP Unit: mm The DBL 1027 is a monolithic integrated circuit consisting of two independant preamplifier with two built-in ALC, nae sane and it has quick stabilization during power supply input. i a) ae at Vode er

1 FEATURES tan He yb

© Excellent channel separation © Low noise © Direct motor drive obtained through SEPP output stage. © Good ALC channel balance © Operating supply voltage range : Veg =5V~13V O Load resistance : Ry > 6802

APPLICATIONS

(J MAXIMUM RATINGS (Ta=25°C) ____ Characteristic Symbol Rating Supply Voltage | Voc 14 Vv | Power Dissipation Pp 600 | mw Operating Temperature | Tope = 20-475 Storage Temperature Tstg 7 =40~4125 °C ee

[J ELECTRICAL CHARACTERISTICS (Unless otherwise specified, Ta =25°C, Vcc =5V, f=1KHz,R, = 10K (PLAY), Ry =680 2 (REC)) ___Gharacteristic__|Symbo!|_Test Condition Typ. | Max. | unit | Quiescent Supply Current | Icco. _ 45 mA | Open-loop Voltage Gain | Gyo | - - | 85 - eB} - “Tey Cid Tt - a ob i REC. _ 58 _ dB Maximum Output, Voltage | Vom | THD=1%. PLAY 09 vi Total Harmonic Distortion THD! Vo =0.5V, PLAY _ O1 | 1 % “Input Resistance Rn — 21 30 — | Ka! i P.F, =20Hz~ i Equivalent Input Vu 8. 20H2z~20KHz Z : 2 WN | Noise Voltage | Ro =22KM. PLAY | | Channel Separation CHsep | Rg =2.2K 2 Vo = OdBm,PLAY 40 50 ol dB ALC Channel Balance ACB Vin = —20dBm, REC. - ie) 2 dB aLcwidth =—sts=<t*é‘T AW: = 600m, REC. =| 85 | |) ALC Distortion AD Vin = -20dBm, REC - 05 2 % O BLOCK DIAGRAM NF2 & Input v, AMP2 AMP2 AMP2 ALC 2 Bias ‘CC Output’ NULL 4) Input (+) Input Output Voltage fe] fs) fe) fy) fo] Lit as Circuit 7" LT Py Pl ET Gy Bl GND. AMP? NULL NFT& AMP1 ALC1 ALC Output AMP 1 (+) Input Output input (input a

COTEST CIRCUIT 2 fl . Fy . sown Tae “fond Tew eye “tak im a wr | owe | 4 bon fA oo LL | ra (0 TEST METHOD a Switch Position Measurement | | } Test Method Symbo! Swi | Sw2 | Sw3 | Swa | SwWa | SW6 | Location | ae Icco | 2 | OFF | OFF | 1 | OFF | OFF =| Read ammeter | eco | te Bae {eee Gio 1 [ON | OFF] 1 | OFF | OFF ab |g =po10g Yo i | | | Gyo 20109 7° (0B) -— | ee ee, ee Gy: 1 OFF | ON ‘ 1 | OFF | OFF } ab | Gy =20log (Vo/Vin (GB) | “Vom | 1 | OFF ON | 1 | OFF | OFF | b ' Measure Output voltage(Vo Jat THD = 1%) THD | 1 OFF; ON | 1 OFF | OFF b Measure distortion factor at Vo =0.5V | SWi-1 Cre wh | ore | ON 1 | ore | OFF | b | Measure crosstalk of amp 1,2 | i igwi-2 | » at output voltage V 9 = 0d8m | i i | i ! i Von | 2 | OFF | ON | 1 | OFF | ON c j coment output noise voltage | | | | | at 1KHz gain when Rg =2.2K 0 | a — | ae “ge i | T Input voltage range from when input | AW | 1. | OFF | OFF) 2 | ON | OFF b | voltage Vin =—60dBm until output — | i i | | | | voltage Vo goes up 348 | i —t _| en ree ee ee ae vo see | | | | | | Output voltage Vo level difference ACB) 1 | OFF |orF 2 | ON | OFF b of amp 1,2 when input voltage | H | Vin =—20dBm is applied | f ‘ao! 4 lorrl ore. 2 | on | ofr b Measure distortion factor when input ook | i | voltage Vin =—20d8m is applied. i a a a or ee a

(J 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) wo Signal Voc © (5) Ee | ® 1 @) ns —- geye we ff a 2. Closed-loop Gain (f= 1KHz) © Closed loop voltage gain e-7 Gy =20i0g(Z1/Z3) (dB) a 1 a 2) © Playback amplifier gain ft rn Gy =20l0g(R,/Ra) (4B) in low frequency re i Zr a Gy =20log(Z1/Z3) (dB) in high frequency zi Hawt © Recording amplifier gain : a Gy =20log(Ri/R3) (dB) 1 Pasi. ae 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¥F in series with 100 to the load end 10pF sour @ Signat + 45) Input ty © st 1000pF ‘20mF TE ak co RL 0.03: g¢ OOHF ie

CI TYPICAL PERFORMANCE CHARACTERISTICS Gyo -f Gy- Mo ToL TAREE ete ON . eS a"eT TUN Re cos ° NJ > 60} +} jj rar ji TS PCH BES 6 n rc a aed ee = sol Noe PLL ET an IPT | Cee H COC : LP EAT ETT ‘ POPP Frequency f (Hz) Frequency f (Hz) THD, Gyo Voc Teco —Vece = = " - 7 z ZAFtrtTt tl Tt] bad eee eee Pd A ) eee ee ee | 2M PT PTT TT Gyre tos z TT) {| PARA eet be “a Pe EEE 3 aaa peeeraH IL . : TTT : JOCECEE ECCT iA _| Supply Voltage Voc (Vi Supply Voltage Veg (VI THD-Vo, AD, Vo—Viy ; a ys ztuse Depo ete pio Tori, Cee de ls

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(CO APPLICATION CIRCUIT Gee I i ihe 2 (| [=] . * fe] BP tie 3 8 8 3 tee — i 2 . mo Ha les 38 T* 3 a {2 [>] i i . #3 | § Pi a « } YQ sa X\\ - a2