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| NJM2769B HEADPHONE AMPLIFIER for CD-ROM GENERAL DESCRIPTION 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. PACKAGE OUTLINE 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 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 BLOCK DIAGRAM 8 7 6 BIAS 5 MUTE 1 2 3 4 -1- NJM2769B ABSOLUTE MAXIMUM RATINGS (Ta=25C) PARAMETER Supply Voltage Power Dissipation Operating Temperature Range Storage Temperature Range SYMBOL V + RATINGS +7 (DMP8) 375 (TVSP8)320 -40 to +85 -50 to +150 UNIT V mW C C PD Topr Tstg ELECTRICAL CHARACTERISTICS (V+=5.0V,Vin=-6dBV,f=1kHz,RL=32,Ta=25C unless otherwise specified) PARAMETER Operating Voltage Operating Current Reference Voltage Closed Loop Gain Channel Balance Output Power SYMBOL V + TEST CONDITIONS MIN. 2.8 TYP. 5.0 2.0 2.1 6 0 50 100 0.02 -98 (12.6) -80 80 65 - MAX. 5.5 4.0 7 +0.5 0.1 UNIT V mA V dB dB mW mW % ICC Vref GV GV PO1 PO2 No Signal No Signal 5 -0.5 RL=32, THD=0.1% RL=16, THD=0.1% 30 40 - Total Harmonic Distortion Output Noise Voltage Mute Attenuation Channel Separation Ripple Rejection Ratio Input Voltage H-level Input Voltage L-level THD Vno ATT CS RR VIH VIL Vripple=-20dBV, Rg=0 Rg=0, A-Weighted Vo/Vin 65 2.0 0.0 dBV -88 (39.8) (Vrms) -70 V + dB dB dB V V 0.3 CONTROL PIN INFORMATION PARAMETER MUTE ON MUTE OFF CONTROL SIGNAL L H OPERATING CONDITION NON-SIGNAL OUTPUT SIGNAL -2- NJM2769B TERMINAL DESCRIPTION PIN SYMBOL NO. FUNCTION EQUIVALENT CIRCUIT TERMINAL VOLTAGE 1 7 OUT1 OUT2 OUTPUT1 OUTPUT2 (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 50k (V -1VBE)/2 + -3- NJM2769B TYPICAL APPLICATION 100F V 16/32 SPEAKER 100F + 47F OUT2 8 7 BIAS 6 BIAS IN2 5 V + 2 1 16/32 SPEAKER 1 OUT1 MUTE H: SPEAKER Active L: SPEAKER Mute 100k 1F mute 2 MUTE 3 IN1 4 GND 1F -4- NJM2769B TYPICAL CHARACTERISTICS Oprating Current vs. Operating Voltage (MUTE=V+) 4 4 3.5 3 2.5 2 1.5 1 0.5 0 0 1 2 3 4 5 6 3.5 3 2.5 2 1.5 1 0.5 0 -40 -20 0 20 40 60 80 100 120 V+=2.8V V+=5V Operating Current vs. Ambient Temperature Operating Current (mA) Operating Current (mA) Operating Voltage (V) o Ambient Temperature ( C) Reference Voltage vs. Operating Voltage 3 2.5 2 1.5 1 0.5 0 0 1 2 3 4 5 6 Reference Voltage vs. Ambient Temperature 3 2.5 2 1.5 V+=2.8V 1 0.5 0 -40 -20 0 20 40 60 80 100 120 o Reference Voltage (V) Reference Voltage (V) V+=5V Operating Voltage (V) Ambient Temperature ( C) Power Dissipation vs.Output Power (V+=5V,f=1KHz) 400 120 350 300 250 200 150 100 50 0 0 20 40 60 80 100 120 THD=10% RL=32 Power Dissipation vs.Output Power (V+=2.8V,f=1KHz) RL=16 Power Dissipation (mW) Power Dissipation (mW) RL=16 100 80 60 40 20 0 0 5 10 RL=32 THD=10% 15 20 25 Output Power (mW) Output Power (mW) -5- NJM2769B THD+N vs. Output Power (V+=5V,f=1KHz,RL=32) 10 10 THD+N vs. Output Power (V+=5V,f=1KHz,RL=16) THD+N (%) THD+N (%) 1 Ta=85 C Ta=25 oC 0.1 Ta=-40 C o o 1 Ta=85 oC Ta=25 C Ta=-40 oC o 0.1 0.01 1 10 100 0.01 1 10 100 Output Power (mW) Output Power (mW) THD+N vs. Output Power (V+=2.8V,f=1KHz,RL=32) 10 10 THD+N vs. Output Power (V+=2.8V,f=1KHz,RL=16) THD+N (%) THD+N (%) 1 Ta=85 oC Ta=-40 C 0.1 o 1 Ta=-40 oC 0.1 Ta=85 oC Ta=25 oC 0.01 1 10 100 0.01 1 Ta=25 oC 10 100 Output Power (mW) Output Power (mW) Output Noise Voltage vs. Ambient Temperature (RL=32,A-Weigthed) -90 -50 Mute Level vs. Frequency (V+=5V,Vin=-6dBV,RL=32) Output Noise Voltage (dBV) Mute Level (dB) -95 V+ =5V -60 -70 -100 V+=2.8V Ta=-40 C -80 o -105 -90 Ta=25 oC Ta=85 oC -110 -40 -20 0 20 40 60 80 100 120 o -100 10 100 1K 10K Ambient Temperature ( C) Frequency (Hz) -6- NJM2769B Channel Separation vs. Frequency (V+=5V,f=1KHz,RL=32) 120 100 Ripple Rejection Ratio vs. Frequency (Vripple=-20dBV,RL=32) Ripple Rejection Ratio (dB) Channel Separation (dB) 110 100 90 80 70 60 50 40 10 80 V+=5V 60 V+=2.8V 40 20 100 1K 10K 0 0.01 0.1 1 10 Frequency (Hz) Frequency (Hz) Voltage Gain vs Mute Control Voltage (V+=5V,f=1KHz,Vin=-6dBV) 20 0 Voltage Gain (dB) Ta=85 oC -20 -40 -60 -80 -100 0 0.5 1 1.5 Ta=25oC Ta=-40 oC 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- |
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