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 ABSOLUTE MAXIMUM RATINGS (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- NJM2769B TERMINAL DESCRIPTION PIN NO. SYMBOL FUNCTION 1 7 OUT1 OUT2 OUTPUT1 OUTPUT2 EQUIVALENT CIRCUIT TERMINAL VOLTAGE + (V -1VBE)/2 10uA 2 MUTE MUTE CONTROL 350k 50k 3 5 IN1 IN2 INPUT1 INPUT2 + (V -1VBE)/2 50k BIAS 50k 6 BIAS REFERENCE VOLTAGE STABILIIZED CAPACITOR CONNECT TERMINAL + (V -1VBE)/2 50k -3- 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 MUTE H: SPEAKER Active 4 3 IN1 GND 1 F 100kΩ 1μF L: SPEAKER Mute -4- NJM2769B TYPICAL CHARACTERISTICS Oprating Current vs. Operating Voltage Operating Current vs. Ambient Temperature 4 3.5 3.5 Operating Current (mA) Operating Current (mA) (MUTE=V+) 4 3 2.5 2 1.5 1 0.5 3 V+=5V 2.5 2 V+=2.8V 1.5 1 0.5 0 0 0 1 2 3 4 5 -40 -20 6 Reference Voltage vs. Operating Voltage 80 100 120 Reference Voltage vs. Ambient Temperature 3 3 2.5 2.5 Reference Voltage (V) Reference Voltage (V) 20 40 60 Ambient Temperature (oC) Operating Voltage (V) 2 1.5 1 0.5 V+=5V 2 1.5 V+=2.8V 1 0.5 0 0 0 1 2 3 4 5 -40 -20 6 0 20 40 60 80 100 120 o Operating Voltage (V) Ambient Temperature ( C) Power Dissipation vs.Output Power Power Dissipation vs.Output Power (V+=5V,f=1KHz) (V+=2.8V,f=1KHz) 400 120 350 Power Dissipation (mW) Power Dissipation (mW) 0 RL=16Ω 300 250 200 RL=32Ω 150 100 THD=10% 50 0 RL=16Ω 100 80 60 40 RL=32Ω THD=10% 20 0 0 20 40 60 80 100 Output Power (mW) 120 0 5 10 15 20 25 Output Power (mW) -5- NJM2769B THD+N vs. Output Power THD+N vs. Output Power (V+=5V,f=1KHz,RL=16Ω) 10 10 1 1 THD+N (%) THD+N (%) (V+=5V,f=1KHz,RL=32Ω) o Ta=85 C Ta=25 oC 0.1 Ta=85 oC Ta=25 C Ta=-40 oC o 0.1 o Ta=-40 C 0.01 0.01 1 10 100 1 Output Power (mW) THD+N vs. Output Power THD+N vs. Output Power 10 10 1 1 Ta=85 oC o Ta=-40 C THD+N (%) THD+N (%) 100 (V+=2.8V,f=1KHz,RL=16Ω) (V+=2.8V,f=1KHz,RL=32Ω) 0.1 Ta=85 oC Ta=-40 oC 0.1 Ta=25 oC Ta=25 oC 0.01 0.01 1 10 100 1 Output Power (mW) 10 100 Output Power (mW) Mute Level vs. Frequency Output Noise Voltage vs. Ambient Temperature (RL=32Ω,A-Weigthed) (V+=5V,Vin=-6dBV,RL=32Ω) -50 -90 -60 V+ =5V -95 V+=2.8V -100 -105 Mute Level (dB) Output Noise Voltage (dBV) 10 Output Power (mW) -70 o Ta=-40 C -80 -90 Ta=25 oC Ta=85 oC -110 -40 -20 0 20 40 60 80 100 120 o Ambient Temperature ( C) -100 10 100 1K 10K Frequency (Hz) -6- NJM2769B Channel Separation vs. Frequency Ripple Rejection Ratio vs. Frequency (V+=5V,f=1KHz,RL=32Ω) (Vripple=-20dBV,RL=32Ω) 100 110 Ripple Rejection Ratio (dB) Channel Separation (dB) 120 100 90 80 70 60 50 40 10 100 1K 80 V+=5V 60 V+=2.8V 40 20 0 0.01 10K Frequency (Hz) 0.1 1 10 Frequency (Hz) Voltage Gain vs Mute Control Voltage (V+=5V,f=1KHz,Vin=-6dBV) 20 Voltage Gain (dB) 0 Ta=85 oC -20 -40 Ta=25oC -60 Ta=-40 oC -80 -100 0 0.5 1 1.5 MUTE Covtrol Voltage (V) [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. -7-