j NJM2768 HAEDPHONE AMPLIFIER for CD-ROM GENERAL DESCRPTION PACKAGE OUTLENE 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. NJM2768M FEATURES Operating Voltage Operating Current Fixed Gain Stereo Headphone Output Internal Mute Circuit Bipolar Technology Package Outline 4.5-5.5V + 2mA typ., at V =5V 0dB typ. DMP8 PIN CONFIGURATION 1 8 2 7 3 6 4 5 PIN FUNCTION 1.OUT1 2.MUTE 3.IN1 4.GND 5.IN2 6.BIAS 7.OUT2 + 8.V BLOCK DIAGRAM 8 6 7 5 BIAS MUTE 1 2 3 4 j NJM2768 ABSOLUTE MAXMUM RANGE (Ta=25C) PARAMETER SYMBOL + Supply Voltage V Power Dissipation PD RATINGS UNIT V mW C Operating Temperature Range Topr +7 (DMP8) 375 750 (note) -40 to +85 Storage Temperature Range Tstg -50 to +150 C (note)At on PC board ELECTRICAL CHARACTERISTICS (V+=5.0V,Vin=0dBV,f=1kHz,RL=32,Ta=25C unless otherwise specified) PARAMETER SYMBOL TEST CONDITIONS + MIN. TYP. MAX. UNIT 4.5 5.0 5.5 V Operating Voltage V Operating Current ICC No Signal - 2.0 4.0 mA Reference Voltage Vref No Signal - 2.1 - V Closed Loop Gain GV -1 0 1 dB Channel Balance GV -0.5 0 +0.5 dB Output Power PO1 RL=32, THD=0.1% 30 50 - mW PO2 RL=16, THD=0.1% 40 100 - mW - 0.02 0.1 % dBV -94 (20) (Vrms) Total Harmonic Distortion THD Output Noise Voltage Vno Rg=0, A-Weighted - -104 (6.3) Mute Attenuation ATT Vo/Vin - -80 -70 dB Channel Separation CS 90 110 - dB Ripple Rejection Ratio RR - 70 - dB Input Voltage H-level VIH 2.0 - V + V Input Voltage L-level VIL 0.0 - 0.3 V Vripple=-20dBV, Rg=0 COMTROL PIN INFOMETION PARAMETER CONTROL SIGNAL OPERATING CONDITION MUTE ON L NON-SIGNAL MUTE OFF H OUTPUT SIGNAL j NJM2768 TYPICAL APPLICATION 100uF 47uF BIAS 6 OUT2 + V 8 7 16 /32 SPEAKER IN2 5 + V BIAS 2 100uF 1 16 /32 SPEAKER mute 1 OUT1 2 MUTE MUTE H:SPEAKER Active L: SPEAKER Mute 100k 3 IN1 4 GND 1 F 1uF 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.