NJM2777 Headphone Amplifier with Electronic Volume PACKAGE OUTLINE GENERAL DESCRIPTION NJM2777 is a headphone amplifier with electronic volume. It includes widely gain adjustable volume, +20 to 80 dB, and mute function. These are controlled by DC voltage. The NJM2777 is suitable for headphone output on TV set. NJM2777D NJM2777M NJM2777V FEATURES Operating Voltage 8 to 10 V Electronic Volume +20dB to -80dB Mute Function Bipolar Package Outline DIP14, DMP14, SSOP14 BLOCK DIAGRAM CNTa CAPa Mute Mute VOL IN a OUTa VOL IN b OUTb Bias Vref CNTb CAPb V+ GND PIN FUNCTION SYMBOL SYMBOL No. FUNCTION No. FUNCTION 1 V+ Power Supply 8 N.C. No connecting 1 14 2 OUTb Bch Output 9 Vref Reference voltage stabilized capacitor connect terminal 3 CNTb Bch Volume control voltage 10 INa Ach Input input 4 CAPb Bch Volume control click 11 CAPa Ach Volume control click noise absorbing capacitor noise absorbing capacitor connect terminal connect terminal 5 INb Bch Input 12 CNTa Ach Volume control voltage input 7 8 6 Mute Mute control 13 OUTa Ach Output 7 N.C. No connecting 14 GND Ground 1 Operating Condition NJM2777 ABSOLUTE MAXIMUM RATING (Ta=25C) PARAMETER SYMBOL RATING UNIT + Supply Voltage V 12 V DIP14 : 500 Power Dissipation P DMP14 : 500* mW D SSOP14 : 440* Operating Temperature Range Topr -20 to +75 C Storage Temperature Range Tstg -40 to +125 C *(Note) EIA/JEDEC STANDARD Test board(76.2 x 114.3 x 1.6mm, 2layers, FR-4)mounting ELECTRICAL CHARACTERISTICS + (V =9V, V =-20dBV, f=1kHz, R =100 , Gv=0dB,Mute terminal =L, Ta=25C) IN L POWER SUPPLY PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT + Operating Voltage V 8 9 10 V Operating Current I No Signal - 5 8 mA CC Reference Voltage V 4 4.1 4.2 V REF AMPLIFIER PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT Volume Operating Range G V , V = 0 to 3.3V 80 100 - dB EVR CNTa CNTb Voltage Gain Channel Balance Gv -1.5 0 1.5 dB Gv=-10dB 8.9 9.5 dBV Maximum Input Voltage V - IM THD=3% (2.8) (3.0) (Vrms) Output Power P Gv=10dB, THD=10% 70 100 - mW O Total Harmonic Distortion THD - 0.1 1 % Channel Separation CS Rg=600 , Vin = 0dBV 70 80 - dB Mute terminal=H, Mute Level Mute - -85 -75 dB Vin = 0dBV -95 -85 dBV Output Noise Voltage 1 V Rg=0 , A-Weighted - NO1 (18) (56) (Vrms) Mute terminal =H -105 -95 dBV Output Noise Voltage 2 V - NO2 Rg=0 , A-Weighted (5.6) (18) (Vrms) Vripple=-20dBV Power Supply Ripple Rejection PSRR - 70 - dB Rg=0 CONTROL PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT + High Level Input Voltage V 2 - V V IH Low Level Input Voltage V 0 - 0.4 V IL CONTROL TERMINAL Control Terminal Operating Condition Description Mute Terminal Mute H Mute the signal Active L, OPEN Output the signal 2