PRELIMINARY NJM2769B HEADPHONE AMPLIFIER for CD-ROM GENERAL DESCRIPTION PACKAGE OUTLINE The NJM2769B is a headphone amplifier designed for CDROM. It includes 6dB closed loop gain and mute circuit, requires few external component. The NJM2769B realizes very low turn-noise at mute mode. It is suitable for CD-ROM, and other general audio headphone amplifier application. NJM2769BM NJM2769BRB1 FEATURES Operating Voltage Operating Current Fixed Gain Stereo Headphone Output Internal Mute Circuit Bipolar Technology Package Outline 2.8 to 5.5V + 2mA typ. at V =5V 6dB typ. DMP8,TVSP8 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 7 6 5 BIAS MUTE 1 2 3 4 -1- NJM2769B PRELIMINARY ABSOLUTE MAXMUM RANGE (Ta=25°C) PARAMETER SYMBOL + Supply Voltage V Power Dissipation PD RATINGS Operating Temperature Range Topr +7 (DMP8) 375 (TVSP8)320 -40 to +85 Storage Temperature Range Tstg -50 to +150 UNIT V mW °C °C ELECTRICAL CHARACTERISTICS (V+=5.0V,Vin=-6dBV,f=1kHz,RL=32Ω,Ta=25°C unless otherwise specified) PARAMETER SYMBOL TEST CONDITIONS + MIN. TYP. MAX. UNIT 2.8 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 5 6 7 dB Channel Balance ∆GV -0.5 0 +0.5 dB Output Power PO1 RL=32Ω, THD=0.1% 30 50 - mW PO2 RL=16Ω, THD=0.1% 40 100 - mW - 0.02 0.1 % Total Harmonic Distortion THD Output Noise Voltage Vno Rg=0Ω, A-Weighted - -98 (12.6) Mute Attenuation ATT Vo/Vin - -80 -70 dB Channel Separation CS 65 80 - dB Ripple Rejection Ratio RR - 65 - dB Input Voltage H-level VIH 2.0 - V + V Input Voltage L-level VIL 0.0 - 0.3 V Vripple=-20dBV, Rg=0Ω dBV -88 (39.8) (µVrms) CONTROL PIN INFORMATION PARAMETER CONTROL SIGNAL OPERATING CONDITION MUTE ON L NON-SIGNAL MUTE OFF H OUTPUT SIGNAL -2- PRELIMINARY NJM2769B TYPICAL APPLICATION 100μF 47μF BIAS OUT2 + V 8 IN2 5 6 7 16Ω/32Ω SPEAKER + V BIAS 2 100μF 1 16Ω/32Ω SPEAKER mute 1 2 OUT1 MUTE H: SPEAKER Active 4 3 MUTE IN1 GND 1 F 100kΩ 1μF L: SPEAKER Mute [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. -3-