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 ■ FEATURES ● Operating Voltage ● Electronic Volume ● Mute Function ● Bipolar ● Package Outline NJM2777M NJM2777V 8 to 10 V +20dB to -80dB DIP14, DMP14, SSOP14 ■ BLOCK DIAGRAM CNTa CAPa Mute Mute IN a VOL OUTa IN b VOL OUTb Bias CNTb CAPb Vref V+ GND ■ PIN FUNCTION 1 7 14 8 No. 1 SYMBOL No. 8 SYMBOL 2 OUTb Bch Output 9 Vref Reference voltage stabilized capacitor connect terminal 3 CNTb Bch Volume control voltage input 10 INa Ach Input 4 CAPb 11 CAPa 5 INb Bch Volume control click noise absorbing capacitor connect terminal Bch Input 12 CNTa 6 Mute Mute control 13 OUTa Ach Output 7 N.C. No connecting 14 GND Ground V+ FUNCTION Power Supply N.C. FUNCTION No connecting Ach Volume control click noise absorbing capacitor connect terminal Ach Volume control voltage input –1– NJM2777 ■ ABSOLUTE MAXIMUM RATING (Ta=25°°C) PARAMETER SYMBOL + Supply Voltage V Power Dissipation PD RATING UNIT V mW °C Operating Temperature Range Topr 12 DIP14 : 500 DMP14 : 500* SSOP14 : 440* -20 to +75 Storage Temperature Range Tstg -40 to +125 ■ ELECTRICAL CHARACTERISTICS °C *(Note) EIA/JEDEC STANDARD Test board(76.2 x 114.3 x 1.6mm, 2layers, FR-4)mounting + (V =9V, VIN=-20dBV, f=1kHz, RL=100Ω, Gv=0dB,”Mute” terminal =L, Ta=25°C) ●POWER SUPPLY PARAMETER SYMBOL TEST CONDITION + Operating Voltage V Operating Current ICC Reference Voltage VREF No Signal MIN. TYP. MAX. UNIT 8 9 10 V - 5 8 mA 4 4.1 4.2 V MIN. TYP. MAX. UNIT 80 100 - dB -1.5 8.9 (2.8) 70 0 9.5 (3.0) 100 1.5 - dB dBV (Vrms) mW - 0.1 1 % ●AMPLIFIER PARAMETER SYMBOL Volume Operating Range GEVR Voltage Gain Channel Balance ∆Gv Maximum Input Voltage VIM Output Power PO TEST CONDITION VCNTa, VCNTb = 0 to 3.3V Gv=-10dB THD=3% Gv=10dB, THD=10% THD Total Harmonic Distortion Channel Separation CS Rg=600Ω, Vin = 0dBV Mute Level Mute “Mute” terminal=H, Vin = 0dBV Output Noise Voltage 1 VNO1 Rg=0Ω, A-Weighted Output Noise Voltage 2 VNO2 Power Supply Ripple Rejection PSRR “Mute” terminal =H Rg=0Ω, A-Weighted Vripple=-20dBV Rg=0Ω - 70 80 - dB - -85 -75 dB - -95 (18) -105 (5.6) -85 (56) -95 (18) - 70 - dB MIN. TYP. MAX. UNIT - dBV (µVrms) dBV (µVrms) ●CONTROL PARAMETER SYMBOL TEST CONDITION + V V High Level Input Voltage VIH 2 - V Low Level Input Voltage VIL 0 - 0.4 ■ CONTROL TERMINAL Control Terminal Mute Terminal Description Mute H Mute the signal Active L, OPEN Output the signal Operating Condition Operating Condition –2– NJM2777 ■ TEST CIRCUIT TEST CIRCUIT1 (THD, GEVR, VIM, PO) Input B CNT B Output B 100Ω 0.47µF 100µF 1µF 7 6 5 N.C. Mute INb V+ VCNTB 4 3 2 CAPb CNTb OUTb 10µF 1 [THD] BPF:400 to 30KHz [GEVR] BPF:1KHz V+ VOL VOL Bias N.C. Vref INa 8 9 10 CAPa CNTa OUTa GND 11 12 10µF 13 14 100µF 0.47µF Output A 1µF VCNTA 100Ω Input A CNT A Volume Range : GEVR= 20 log [THD] BPF:400 to 30KHz [GEVR] BPF:1KHz Vo max Vo min Vomin : Output voltage at VCNT=0V Vomax : Output voltage at VCNT=3.3V –3– NJM2777 TEST CIRCUIT 2 (VNO1,VNO2,VREF) Input B CNT B Output B 100Ω VCNTB 0.47µF 1µF 7 6 5 N.C. Mute INb [VNO1, VNO2] A-Weighted 100µF V+ 4 3 2 CAPb CNTb OUTb 1 10µF V+ VOL VOL Bias N.C. Vref INa 8 9 10 CAPa CNTa OUTa GND 11 12 13 14 100µF 10µF 0.47µF [VREF] Output A 1µF VCNTA 100Ω Input A –4– CNT A [VNO, VNO2] A-Weighted NJM2777 TEST CIRCUIT 3 (Icc) Input B CNT B Rg=600Ω Output B 100Ω VCNTB V+ 100µF 1µF [Icc] 0.47µF 7 6 5 N.C. Mute INb 4 3 2 CAPb CNTb OUTb 1 10µF V+ VOL VOL Bias N.C. Vref INa 8 9 10 CAPa CNTa OUTa GND 11 0.47µF 10µF 12 13 100µF VCNTA Rg=600Ω 14 Output A 1µF 100Ω Input A CNT A –5– NJM2777 TEST CIRCUIT 4 (CS) Input B CNT B Rg=600Ω 100Ω VCNTB [CS] BPF:1KHz 100µF 1µF 0.47µF 7 6 5 4 N.C. Mute INb 3 2 CAPb CNTb OUTb 1 10µF V+ VOL Rg=600Ω VOL Bias N.C. Vref INa 8 9 10 CAPa CNTa OUTa GND 11 0.47µF 12 13 14 100µF 10µF Output A 1µF Rg=600Ω –6– Input A VCNTA CNT A [CS] BPF:1KHz 100Ω NJM2777 TEST CIRCUIT 5 (PSRR) Input B CNT B Output B 100Ω Rg=0Ω VCNTB [PSRR] BPF:1KHz 100µF 1µF 0.47µF 7 6 5 N.C. Mute INb 4 3 2 CAPb CNTb OUTb 1 10µF V+ V+ VOL VOL Bias N.C. Vref INa 8 9 10 CAPa CNTa OUTa GND 11 0.47µF 12 13 14 100µF 10µF Output A Rg=0Ω 1µF VCNTA 100Ω Input A [PSRR] BPF:1KHz CNT A –7– NJM2777 TEST CIRCUIT 6 (MUTE) CNT B Input B Output B 100Ω VCNTB 0.47µF 100µF V+ 1µF 7 6 5 N.C. Mute INb 4 3 2 CAPb CNTb OUTb 1 [MUTE] BPF:1KHz 10µF V+ VOL VOL Bias N.C. Vref INa 8 9 10 CAPa CNTa OUTa GND 11 12 13 14 10µF 0.47µF 100µF Output A [MUTE] BPF:1KHz 1µF 100Ω Input A –8– CNT A NJM2777 ■ APPLICATION CIRCUIT Input B Output B CNT B 1µF 1µF 0.47µF 100kΩ 7 6 5 N.C. Mute INb 100µF 4 3 2 CAPb CNTb OUTb 75Ω 1 10µF V+ VOL VOL Bias N.C. Vref INa 8 9 10 CAPa CNTa OUTa GND 11 0.47µF 12 13 14 100µF 10µF Output A 1µF CNT A 75Ω Input A –9– NJM2777 ■ TERMINAL DESCRIPTION PIN NO. SYMBOL 2 13 OUTb OUTa FUNCTION EQUIVALENT CIRCUIT Bch Output Ach Output 18k TERMINAL VOLTAGE 2.2 1k OUT 200 V+/2 25p 3 12 CNTb CNTa Bch Volume Control Ach Volume Control CAP CNT 200 42k 42k 4 CAPb 11 CAPa - Bch Volume control click noise absorbing capacitor connect terminal Ach Volume control click noise absorbing capacitor connect terminal CAP CNT 200 42k 42k 5 10 INb INa Bch Input Ach Input IN 200 GND 50k – 10 – NJM2777 ■ TERMINAL DESCRIPTION PIN NO. SYMBOL 6 Mute FUNCTION EQUIVALENT CIRCUIT TERMINAL VOLTAGE Mute Control Mute 200 GND 400k 9 Vref Reference voltage stabilized capacitor connect terminal 100k Vref V+/2 200 100k – 11 – NJM2777 ■ TYPICAL CHARACTERISTICS Operating Current vs. Ambient Temperature Operating Current vs. Operating Voltage V+=9V, No signal, MUTE=L No signal, MUTE=L, Ta=25°C 8 7 7 6 6 Operating Current [mA] Operating Current [mA] 8 5 4 3 5 4 3 2 2 1 1 0 0 4 6 8 10 12 14 -50 50 100 150 Ambient Temperature [°C] Reference Voltage vs. Operating Voltage Reference Voltage vs. Ambient Temperature No signal, MUTE=L, Ta=25°C V+=9V, No signal, MUTE=L 7 7 6 6 Reference Voltage [V] Reference Voltage [V] 0 Operating Voltage [V] 5 4 5 4 3 3 2 2 4 6 8 10 12 -50 14 0 50 100 150 Ambient Temperature [°C] Operating Voltage [V] Voltage Gain vs. Control Voltage (Frequency) Voltage Gain vs. Control Voltage (Operating Voltage) V+=9V, Vin=-20dBV, RL=100Ω, Ta=25°C 40 40 20 20 0 0 -20 -40 V+=8V, 9V, 10V -20 -40 f=100Hz, 1kHz, 10kHz -60 -60 -80 -80 -100 0.0 0.5 1.0 1.5 2.0 VCNT [V] – 12 – Voltage Gain[dB] Voltaqge Gain [dB] Vin=-20dBV, f=1kHz, RL=100Ω, Ta=25°C 2.5 3.0 -100 0.0 0.5 1.0 1.5 2.0 VCNT [V] 2.5 3.0 NJM2777 ■ TYPICAL CHARACTERISTICS Voltage Gain vs. Control Voltage (Ambient Temperature) Mute Level vs. Mute Control Voltage V+=9V, Vin=-20dBV, f=1kHz, RL=100Ω 40 V+=9V, Vin=0dBV, f=1kHz, Gv=0dB, RL=100Ω 20 -20°C 25°C 20 0 75°C Mute Level [dB] -20 -40 -20 Ta=-20°C Ta=25°C -40 T a=75°C -60 -60 -80 -80 -100 0.0 0.5 1.0 1.5 2.0 2.5 -100 0.0 3.0 1.0 2.0 VCNT [V] Mute Level vs. Frequency 4.0 Mute Level vs. AMbient Temperature V+=9V, Vin=0dBV, f=1kHz, Gv=0dB, RL=100Ω, MUTE=H 0 0 -10 -10 -20 -20 -30 -30 -40 Mute Level [dB] Mute Level [dB] 3.0 Mute Control Voltage [V] V+=9V, Vin=0dBV, Gv=0dB, RL=100Ω, MUTE=H, Ta=25°C -50 -60 -70 -40 -50 -60 -70 -80 -80 -90 -90 -100 -100 -110 -50 -110 10 100 1000 10000 100000 0 50 100 150 Ambient Temperature [°C] Frequency [Hz] Voltage Gain Channel Balance vs. Control Voltage (Ambient Temperature) V+=9V, Vin=-20dBV, f=1kHz, RL=100Ω Voltage Gain Channel Balance vs. Control Voltage (Frequency) V+=9V, Vin=-20dBV, RL=100Ω, Ta=25°C 1.5 1.5 1 1 Voltage Gain Channel Balance [dB] Voltage Gain Channel Balance [dB] Voltage Gain [dB] 0 f=10kHz 0.5 0 -0.5 -1 -1.5 0.0 f=1kHz 100Hz -20°C 0.5 0 -0.5 25°C 75°C -1 -1.5 0.5 1.0 1.5 2.0 VCNT [V] 2.5 3.0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 VCNT [V] – 13 – NJM2777 ■ TYPICAL CHARACTERISTICS THD+N vs. Output Power (Operating Voltage) THD+N vs. Output Power (Frequency) f=1kHz, Gv=10dB, RL=100Ω, BW=400Hz-30kHz, Ta=25°C V+=9V, Gv=10dB, RL=100Ω, Ta=25°C 100 100 f=100Hz: BW=22Hz-30kHz f=1kHz : BW=400Hz-30kHz f=10kHz: BW=400Hz-80kHz V+=10V V+=9V 10 10 f=10kHz THD+N [%] THD+N [%] V+=8V 1 0.1 1 0.1 f=100Hz, f=1kHz 0.01 1E-6 10E-6 100E-6 1E-3 10E-3 100E-3 0.01 1E-6 1E+0 10E-6 100E-6 Output Power [W] 1E-3 10E-3 100E-3 1E+0 Output Power [W] THD+N vs. Output Power (Ambient Temperature) Power Dissipation vs. Output Power V+=9V, f=1kHz, Gv=10dB, RL=100Ω, BW=400Hz-30kHz f=1kHz, Gv=10dB, RL=100Ω, BW=400Hz-30kHz, Ta=25°C, 2ch Input 100 180 160 140 Power Dissipation [mW] THD+N [%] 10 Ta=25°C Ta=-20°C 1 0.1 120 THD=10% 100 V+=10V THD=10 % 80 V+=9V 60 THD=10 % V+=8V 40 Ta=75°C 20 0.01 1E-6 0 10E-6 100E-6 1E-3 10E-3 100E-3 1E+0 0 20 40 Output Power [W] 60 80 100 120 140 Output Power [mW/ch] Output Power vs. Operating Voltage Output Noise Voltatge 1 vs. Ambient Temperature f=1kHz, THD=10%, Gv=10dB, RL=100Ω, BW=400Hz-30kHz V+=9V, Gv=0dB, RL=100Ω, Rg=0Ω, A-Weighted, MUTE=L 200 -80 180 Ta=75°C -85 160 Output Noise Voltatge 1 [dBV] Ta=25°C Output Power [mW] 140 Ta=-20° 120 100 80 60 40 -95 -100 -105 -110 -115 20 0 6 7 8 9 10 Operating Voltage [V] – 14 – -90 11 12 13 -120 -50 0 50 100 Ambient Temperature[°C] 150 NJM2777 ■ TYPICAL CHARACTERISTICS Output Noise Voltatge 2 vs. Ambient Temperature V+=9V, RL=100Ω, Rg=0Ω, A-Weighted, MUTE=H -80 Output Noise Voltatge 2 [dBV] -85 -90 -95 -100 -105 -110 -115 -120 -50 0 50 100 150 Ambient Temperature[°C] [CAUTION] The specifications on this data book are only given for information, without any guarantee as regards either mistakes or omissions. The application circuits in this data book 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. – 15 –