BA3308

BA3308 UTC | Alldatasheet

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UTC BA3308 LINEAR INTEGRATED CIRCUIT UTC UNISONIC TECHNOLOGIES CO., LTD. 1 www.unisonic.com.tw QW-R107-015,A DUAL PREAMPLIFIER WITH ALC

DESCRIPTION

The UTC BA3308 is designed to have dual preamplifier ICs with built – in ALC circuits for use in stereo amplification. The preamplifiers have high gain and low distortion. A built-in rectifier for ALC circuit implies good channel balance and large dynamic range can be cons tructed with addition of just an external time constant circuit.

FEATURES

• Wide operating power supply voltage range (VCC =6.0V ~ 14V) * Power-on mute circuit to avoid “pop” noise generation. * No input coupling capacitors are necessary * High gain (G VO=80dB)and low noise (VNIN=1µVrms) * Low distortion (THD=0.1%) * Good ALC channel balance with built-in ALC rectifier diode * Adjustable ALC dynamic range by external input resistor. SIP-9 SOP-14 *Pb-free plating product number: BA3308L BLOCK DIAGRAM SIP-9 -ch1 123 4 5678 9 NF1 INPUT1 OUTPUT1 GND ALC Vcc OUTPUT2 INPUT2 NF2 ALC MUTE ch2 SOP-14 7 8 N.C. N.C. N.C. N.C. N.C. ALC Vcc NF1 INPUT1 INPUT2 OUTPUT1 GND ALC VCC OUTPUT2 NF2

UTC BA3308 LINEAR INTEGRATED CIRCUIT UTC UNISONIC TECHNOLOGIES CO., LTD. 2 www.unisonic.com.tw QW-R107-015,A ABSOLUTE MAXIMUM RATINGS (Ta = 25Ċ) PARAMETER SYMBOL RATINGS UNIT Power Supply Voltage V CC 16 V SIP-9 950 *1 Power Dissipation SOP-14 PD 450 *2 mW Operating Temperature T OPR 0 ~ +70 Ċ Storage Temperature T STG -65 ~ +125 Ċ *1 Reduced by 9.5mW for each increase in Ta of 1°C over 25°C. *2 Reduced by 4.5mW for each increase in Ta of 1°C over 25°C. (when mounted on a 70mm Ò70mm Ò1.6mm glass epoxy board) RECOMMENDED OPERATING CONDITIONS (Ta = 25Ċ) Power supply voltagerange 1 +6.0V ~ +14V ( Ta = 25~ +75Ċ ) Power supply voltagerange 2 +4.5V ~ +14V ( Ta = 0~ +75Ċ ) * When it is used below Ta = 0Ċ, please use it within the range of operating power supply voltage1.

ELECTRICAL CHARACTERISTICS

(Ta =25Ċ, VCC =7.0V, f =1kHz and BPF: 20Hz ~ 20kHz, unless otherwise noted.) PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT Maximum output voltage V OM THD=1% 0.6 1.2 V rms Input conversion noise voltage V NIN Conversion with Rg=2.2kΩ and NAB34dB at 1kHz 1.0 2.0 µVrms Quiescent current I Q V IN =0Vrms 1.5 3.3 4.5 mA Input resistance R IN 15 31.5 45 k Ω Total harmonic distortion THD NAB34dB, V OUT =40mVrms 0.1 0.3 % Open loop voltage gain G VO V OUT = −10dBV 70 80 dB ALC range ALC RG =3.9kΩ, VIN =−70dBV reference, THD=3% 40 70 dB ALC channel balance ∆ALC V IN = −60dBV, −30dBV 0 2.5 dB Channel separation CS V O =0dBV, NAB34dB 60 75 dB

UTC BA3308 LINEAR INTEGRATED CIRCUIT UTC UNISONIC TECHNOLOGIES CO., LTD. 3 www.unisonic.com.tw QW-R107-015,A APPLICATION CIRCUIT -ch1 123 4 5678 9 ALC MUTE ch2 100DŽF 39Ω 18kΩ 3.9KΩ 10DŽF + + + C5 10DŽF 1MΩ ++C7 22DŽF 330DŽF 10DŽF 10DŽF ++ C4 100DŽF 39Ω 3.9kΩ 18kΩ 220Ω Vcc INPUT1 INPUT2OUTPUT1 OUTPUT2 R9 (R10) 120kΩ C9 (R10) 0.027DŽF 4.3kΩ R11(R12) For playback,instead of R5 and R6,connect the following NAB time constant circuit between pins 1 and 3 and 7 and 9.

UTC BA3308 LINEAR INTEGRATED CIRCUIT UTC UNISONIC TECHNOLOGIES CO., LTD. 4 www.unisonic.com.tw QW-R107-015,A TOTAL APPLICATION CIRCUIT 220Ƹ 330DŽF + 3.9kƸ 3.9kƸ MIC RADIO etc. BIAS OSC CB 1 6 3 7549 22DŽF 1MΩ 18kƸ39Ƹ 100DŽF 0.027DŽF 120kƸ4.3kƸ CB 39Ω 100DŽF + 0.027DŽF 120kƸ 4.3kƸ 18kƸ Cc CA LR A Cc CA LR A 10DŽF 10DŽF UTC BA3308 UTC BA5406 10kƸ 10kƸ 2.2DŽF 2.2DŽF 33DŽF 100DŽF 120Ƹ + 47DŽF 470DŽF 120Ƹ 33DŽF ++ 47DŽF 47DŽF 470 DŽF2.2Ƹ 0.22DŽF SP SP 2.2Ω 9 12 6 10 11 23714 1000DŽF + 9V 0.22DŽF Notes: (1) Switches are in the playback positions. (2) Set the values of R A and CA depending on the characteristics of the playback/recording head. (3) The capacitor CB is for head resonance treble compensation during playback, and prevention of high-frequency noise. The recommended value is about 1000pF. (4) L and CC are a bias trap.

UTC BA3308 LINEAR INTEGRATED CIRCUIT UTC UNISONIC TECHNOLOGIES CO., LTD. 5 www.unisonic.com.tw QW-R107-015,A Cont R7(R8) 1MΩ C7(C8) 22DŽFC5(C6) 10DŽFC1(C2) 10DŽF R1(R1) 3.9kΩ INPUT C3(C4) 100DŽF R3(R4) 39Ω R5(R6) 18kΩ ch2 (ch1) ch2 (ch1) Fig.1 ch1 (ch2) OUTPUT ch1 (ch2) ch2 (ch1) ch2 (ch1) Comp Cont 4.5VF R7 C7 2 (8) (R2) 3 (7)VOUT (DC+AC) 3VF Fig.2

UTC BA3308 LINEAR INTEGRATED CIRCUIT UTC UNISONIC TECHNOLOGIES CO., LTD. 6 www.unisonic.com.tw QW-R107-015,A -A1 C1(C2) 10DŽF C3(C4) 100DŽF R3(R4) 39Ω R11(R12) 4.3kΩ R9(R10) 120kΩ C5(C6) 10DŽF0.027DŽF C9(C10) OUTPUT INPUT Fig.3 OPERATION NOTES The UTC BA3308 has a built-in power-on mute circuit to prevent generation of a “pop” sound when the power is applied. The generation of the “ pop” sound is prevented by the DC blocking capacitors C3 and C4 connected to pins 1 and 9, and the charge time required for the ripple filter capacitor C8 that is connected to pin 6. To ensure correct operation of this circui t, use the values given in the application circuit for C3, C4, R3, R4, C8 and R8.

UTC BA3308 LINEAR INTEGRATED CIRCUIT UTC UNISONIC TECHNOLOGIES CO., LTD. 7 www.unisonic.com.tw QW-R107-015,A ELECTRICAL CHARACTERISTIC CURVES 206 4 8 12 Fig.4 Quiescent current vs.power supply voltage POWER SUPPLY VOLTAGE , Vcc (V) QUIESCENT CURRENT, IQ (mA) 14 -25-50 250 100 Fig.5 Quiescent current vs.ambient temperature AMBIENT TEMPERATURE, Ta (Ċ) QUIESCENT CURRENT, IQ (mA) VCC=7V 100 20 64 8 12 Fig.6 Voltage gain vs. power supply voltage POWER SUPPLY VOLTAGE, Vcc (V) VOLTAGE GAIN, Gvo (dB) VOUT=300mVrms f=1kHz R L=10KΩ -25-50 25 0 100 120 Fig.7 Closed loop voltage gain vs. ambient temperature AMBIENT TEMPERATURE, Ta (Ċ) CLOSED LOOP VOLTAGE GAIN, Gvo (dB) 100 Vcc=7V VOUT=300mVrms f=1kHz RL=10kΩ R5, R6=18kΩ R5, R6=6.8kΩ

UTC BA3308 LINEAR INTEGRATED CIRCUIT UTC UNISONIC TECHNOLOGIES CO., LTD. 8 www.unisonic.com.tw QW-R107-015,A -60-80 -20-40 -20 -40 Fig.8 ALC characteristics INPUT VOLTAGE, VIN (dBV) OUTPUT VOLTAGE, VOUT (dBV) Vcc=7V f=1kHz Gv=52dB ch2 VOUT -80 -70 -50 -40 Fig.9 Input/output characteristics INPUT VOLTAGE, VIN (dBV) OUTPUT VOLTAGE, VOUT (Vrms) -30 0.1 Vcc=7V f=1kHz Gv=52dB RL=10kƸ VOUT 0.01 -60 -20 ch1 1.6 20 64 0.4 0.8 1.4 1.2 0.6 0.2 8 12 Fig.10 Maximum output voltage vs. power supply voltage POWER SUPPLY VOLTAGE, Vcc (V) MAXIMUM OUTPUT VOLTAGE, VOM (Vrms) f=1kHz THD=1% R L=10kƸ 100 0.8 1.2 1.8 1.6 0.6 Fig.11 Maximum output voltage vs. load resistance LOAD RESISTANCE, RL (Ω ) MAXIMUM OUTPUT VOLTAGE, VOM (Vrms) 10k 1.4 Vcc=7V f=1kHz THD=1% 0.4 0.2 UTC assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all UTC products described or contained herein. UTC products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice.