NJM2768

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=25°C) 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=32Ω,Ta=25°C 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 ∆G V PO1 PO2 No Signal No Signal -1 -0.5 RL=32Ω, THD=1% RL=16Ω, THD=1% 30 40 - Total Harmonic Distortion Output Noise Voltage Mute Attenuation ...