j NJM2769A HAEDPHONE AMPLIFIER for CD-ROM ■ GENERAL DESCRPTION ■ PACKAGE OUTLENE The NJM2769A is a headphone amplifier designed for CDROM. It includes 6dB closed loop gain and mute circuit which require few external component. The NJM2769A realizes very low turn-noise at mute mode. It is suitable for CD-ROM , and other general audio headphone amplifier application. ■ FEATURES ● ● ● ● ● ● ● Operating Voltage 4.5-5.5V + Operating Current 2mA typ., at V =5V Fixed Gain 6dB typ. Stereo Headphone Output Internal Mute Circuit Bipolar Technology Package Outline 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 NJM2769AM j NJM2769A ■ ABSOLUTE MAXMUM RANGE (Ta=25°C) PARAMETER SYMBOL + Supply Voltage V Power Dissipation PD RATINGS Operating Temperature Range Topr +7 (DMP8) 375 750 (note) -40 to +85 Storage Temperature Range Tstg -50 to +150 UNIT V mW °C °C (note)At on PC board ■ 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 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 5 6 7 dB Channel Balance ∆GV -0.5 0 +0.5 dB Output Power PO1 RL=32Ω, THD=1% 30 50 - mW PO2 RL=16Ω, THD=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 ■ COMTROL PIN INFOMETION PARAMETER CONTROL SIGNAL OPERATING CONDITION MUTE ON L NON-SIGNAL MUTE OFF H OUTPUT SIGNAL dBV -88 (39.8) (µVrms) j NJM2769A ■ TYPICAL APPLICATION 100uF 47uF 16Ω Ω /32Ω Ω SPEAKER BIAS 6 OUT2 + V 8 7 IN2 5 + V BIAS 2 100uF 1 16Ω Ω /32Ω Ω SPEAKER mute 1 OUT1 2 MUTE MUTE H:SPEAKER Active L:SPEAKER Mute 100kΩ Ω 3 IN1 4 GND 1 F 1uF NJM2769A 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.