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| Datasheet File OCR Text: |
| j HAEDPHONE AMPLIFIER for CD-ROM s GENERAL DESCRPTION The NJM2768 is a headphone amplifier designed for CDROM. It includes 0dB closed loop gain and mute circuit which require few external component. The NJM2768 realizes very low turn-noise at mute mode. It is suitable for CD-ROM , and other general audio headphone amplifier application. s PACKAGE OUTLENE NJM2768 NJM2768M s FEATURES qOperating Voltage qOperating Current qFixed Gain qStereo Headphone Output qInternal Mute Circuit qBipolar Technology qPackage Outline 4.5-5.5V + 2mA typ., at V =5V 0dB typ. DMP8 s PIN CONFIGURATION PIN FUNCTION 1.OUT1 2.MUTE 3.IN1 4.GND 5.IN2 6.BIAS 7.OUT2 + 8.V 1 2 3 4 8 7 6 5 s BLOCK DIAGRAM 8 7 6 BIAS 5 MUTE 1 2 3 4 j s ABSOLUTE MAXMUM RANGE (Ta=25C) PARAMETER Supply Voltage Power Dissipation Operating Temperature Range Storage Temperature Range (note)At on PC board SYMBOL V + NJM2768 RATINGS +7 (DMP8) 375 750 (note) -40 to +85 -50 to +150 UNIT V mW C C PD Topr Tstg + s ELECTRICAL CHARACTERISTICS (V =5.0V,Vin=0dBV,f=1kHz,RL=32,Ta=25C unless otherwise specified) PARAMETER Operating Voltage Operating Current Reference Voltage Closed Loop Gain Channel Balance Output Power SYMBOL V + TEST CONDITIONS MIN. 4.5 TYP. 5.0 2.0 2.1 0 0 50 100 0.02 -104 (6.3) -80 110 70 - MAX. 5.5 4.0 1 +0.5 0.1 UNIT V mA V dB dB mW mW % ICC Vref GV GV PO1 PO2 No Signal No Signal -1 -0.5 RL=32, THD=1% RL=16, THD=1% 30 40 - Total Harmonic Distortion Output Noise Voltage Mute Attenuation Channel Separation Ripple Rejection Ratio Input Voltage H-level Input Voltage L-level THD Vno ATT CS RR VIH VIL Vripple=-20dBV, Rg=0 Rg=0, A-Weighted Vo/Vin 90 2.0 0.0 dBV -94 (20) (Vrms) -70 V + dB dB dB V V 0.3 s COMTROL PIN INFOMETION PARAMETER MUTE ON MUTE OFF CONTROL SIGNAL L H OPERATING CONDITION NON-SIGNAL OUTPUT SIGNAL j s TYPICAL APPLICATION NJM2768 100uF V 16/32 SPEAKER 100uF + 47uF OUT2 8 7 BIAS 6 BIAS IN2 5 V + 2 1 16/32 SPEAKER 1 OUT1 MUTE H:SPEAKER Active L: SPEAKER Mute 100k 1uF mute 2 MUTE 3 IN1 4 GND 1F NJM2768 MEMO [CAUTION] The specifications on this databook are only given for information , without any guarantee as regards either mistakes or omissions. The application circuits in this databook are described only to show representative usages of the product and not intended for the guarantee or permission of any right including the industrial rights. |
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