NJW1241 3-Chanels Differential Output Line Amplifier GENERAL DESCRIPTION The NJW1241 is a differential output 3-channel audio line amplifier for High Voltage Pre-out of Car AV system. It can swing 5Vrms(14.1V peak-to peak) singal at 8V opearating voltage /single-end output because of including the charge pump circuit. Ground-referenced outputs eliminate output coupling capacitor. The pop noise suppression circuit reduces a pop noise at the power-on and power-off. PACKAGE OUTLINE NJW1241V FEATURES l Operating Voltage l Operating Current 6.0V to +10V IDD=12mA typ. at V+=8V, RL=47kΩ, No Signal 5.0Vrms min. @single-end output 0.004% typ l Maximum Output Voltage l Low Distortion l Output Coupling Capacitor-less l External Synchronizing Divide-by-2 l Pop Noise Suppression Circuit l External Mute l Gain Select +6dB/+8dB l RF Immunity OpAmp tolerant to FR noise. (ex. mobile phone) l Bi-CMOS Technology l Package Outline SSOP32 BLOCK DIAGRAM V+ IN1 OUT1A Mute Tr V- OUT1B Mute Tr V+ IN2 OUT2A Mute Tr V- OUT2B Mute Tr V+ IN3 OUT3A Mute Tr V- OUT3B Mute Tr Gain Select Ver. 0.4E Charge Pump Pop Noise Suppression V- V + Detector –1– NJW1241 NJW1241 PIN CONFIGURATION No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 –2– Symbol IN1 REF1 IN2 REF2 IN3 REF3 MUTE GAIN V- IN V- OUT RegCNT NC NC CLK V+ Reg NC Function Input 1 Reference 1 Input 2 Reference 2 Input 3 Reference 3 MUTE / Pop Noise Suppression Gain Select V- Power Input V- Power Output V- Power Control No Connect No Connect External Clock Input V+ Power Supply for Regulator No Connect No. 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 Symbol Function NC No Connect FB V- Power Supply External Setting CP Flying Capacitor Positive Terminal NC No Connect NC No Connect GND Ground CN Flying Capacitor Negative Terminal MUTE_TC Pop Noise Suppression Capacitor V+ A V+ Power Supply for Analog GND Ground Output 3B OUT3B Output 3A OUT3A Output 2B OUT2B Output 2A OUT2A OUT1B Output 1B OUT1A Output 1A NJW1241 ABSOLUTE MAXIMUM RATING (Ta=25°C) PARAMETER SYMBOL RATING UNIT V 10.5 V VCLK -0.3∼+6 V VRegCNT -0.3∼+6 V + Supply Voltage CLK Terminal Voltage - V Power Supply Control Voltage FB Terminal Voltager - VFB Maximum Input Voltage (V OUT)+6 VIN Power Dissipation V + V +0.3 V (Note1) PD 905 mW Operating Temperature Range Topr -40 ~ +85 °C Storage Temperature Range Tstg -40 ~ +125 °C (Note1) EIA/JEDEC STANDARD Test board (76.2x114.3x1.6mm, 2layer, FR-4) mounting RECOMMENDED OPERATING CONDITIONS (Ta=25°C unless otherwise specified) PARAMETER SYMBOL Operating Voltage (Note2) External Clock Input Range External Clock Duty Input Range TEST CONDITION MIN. TYP. MAX. UNIT V+ 6 8 10 V fCLK 150 - 1250 kHz DUTY 45 - 80 % (Note2) The regulator for V- power supply operates by the half of fCLK. ELECTRICAL CHARACTERISTICS + (Ta=25°C, V =8V, f=1kHz, Vin=0dBV, RL=47kΩ, GAIN=Low, MUTE=High, RegCNT=High unless otherwise specified) PARAMETER SYMBOL Operating Current IDD Voltage Gain1 GV1 Voltage Gain2 GV2 TEST CONDITION No signal GAIN=High MIN. TYP. MAX. UNIT - 12 20 mA 5.5 6 6.5 dB 7.5 8 8.5 dB Maximum Output Voltage VOMAX THD=1%, 5 - - Vrms Mute Level VMUTE MUTE=Low - -100 -80 dB S/N Ratio VNO1 - 100 - dB Total Harmonic Distortion THD - 0.004 - % 80 - - dB - 300 - kHz MIN. TYP. MAX. UNIT Vin=500mVrms , A=Weighted Differential Output BW:400Hz-22kHz, Differential Output Channel Separation CS Rg=600Ω Internal Oscillating Frequency fOSC fCLK=No signal CONTROL CHARACTERISTICS + (Ta=25°C, V =8V, f=1kHz, Vin=0dBV, RL=47kΩ unless otherwise specified) PARAMETER SYMBOL TEST CONDITION + V Mute Terminal High MuteH MUTE OFF 2.3 - V Mute Terminal Low MuteL MUTE ON 0 - 0.7 V + Gain Terminal High GainH Gv=8dB 2.3 - V V Gain Terminal Low GainL Gv=6dB 0 - 0.7 V CLK Terminal High CLKH 2.3 - 5.5 V CLK Terminal Low CLKL 0 - 0.7 V –3– NJW1241 TERMINAL DESCRIPTION Terminal SYMBOL FUNCTION EQUIVALENT CIRCUIT V +A 1 3 5 IN1 IN2 IN3 INPUT1 INPUT2 INPUT3 V+A VOLTAGE V +A 10kΩ 0V 50kΩ V-IN 1pF V-IN V+A V+A V+A 6.3kΩ 2 4 6 REF1 REF2 REF3 Reference1 Reference2 Reference3 10kΩ 0V 50kΩ V-IN 1pF V-IN V +A 7 8 MUTE GAIN MUTE/Pop Noise Suppression Gain Select V +A 0V 20kΩ 100kΩ 1pF V-IN Reg(5V) 500kΩ 100Ω 11 RegCNT V- Power Control 0V 500kΩ Reg(5V) 14 CLK External Clock Input 100Ω 0V 1MΩ –4– Reg(5V) NJW1241 TERMINAL DESCRIPTION Terminal SYMBOL FUNCTION EQUIVALENT CIRCUIT VOLTAGE Reg(5V) 100Ω 18 FB 1kΩ V- Power Supply External Setting 2pF V-OUT V+Reg 19 CP Flying Capacitor Positive Terminal - V -OUT 23 CN Flying Capacitor Negative Terminal - V-OUT V+A 24 MUTE_TC Pop Noise Suppression Capacitor V-OUT V +A V+A 100kΩ 50kΩ 0V 1MΩ V -IN 27 28 29 30 31 32 OUT6 OUT5 OUT4 OUT3 OUT2 OUT1 Output6 Output5 Output4 Output3 Output2 Output1 V-IN V+A V +A V-IN V +A 200Ω 0V 50Ω V-IN 200Ω FB V -IN V-IN –5– NJW1241 TEST CIRCUIT (IDD) IN1 C1=1uF OUT1A Mute 1 50kΩ REF1 Mute 2 IN2 C2=1uF Mute 50kΩ REF2 Mute 4 Mute 5 50kΩ Mute 6 29 RL=47kΩ 28 RL=47kΩ 27 RL=47kΩ GND 7 100kΩ 26 Pop Noise Suppression Gain Select 6dB/8dB 8 100kΩ Bias 9 V +A V+ 25 + MUTE _TC C8=1uF V -IN C10=100uF C9=1uF 24 V -OUT V+ CN 10 A 23 RegCNT GND 11 22 Negative Voltage Regulator R2=680kΩ NC 12 NC C7=1uF 21 NC NC 13 20 CLK CP 14 19 V +Reg C6=1uF RL=47kΩ OUT3B MUTE V+ RL=47kΩ 30 OUT3A REF3 C5=1uF 31 OUT2B IN3 GAIN RL=47kΩ OUT2A 3 C3=1uF 32 OUT1B FB 15 18 NC NC 16 17 V-OUT [Pin 10] TEST CIRCUIT (Gv, VOMAX, THD, VMUTE) IN1 C1=1uF OUT1A Mute 1 REF1 50kΩ Mute 2 IN2 C2=1uF Mute 50kΩ Mute 4 Mute 50kΩ 7 100kΩ Gain Select 6dB/8dB 100kΩ V-IN C5=1uF V V -OUT 11 NC 12 NC 13 CLK 14 V +Reg C6=1uF RL=47kΩ 28 RL=47kΩ 27 RL=47kΩ V+A V+ 25 + MUTE _TC C8=1uF C9=1uF 24 CN 10 R2=680kΩ –6– Bias 23 RegCNT + 29 26 Pop Noise Suppression 8 9 RL=47kΩ GND MUTE GAIN 30 OUT3B Mute 6 3V~V + RL=47kΩ OUT3A 5 REF3 31 OUT2B IN3 C3=1uF RL=47kΩ V OUT2A 3 REF2 32 OUT1B GND Negative Voltage Regulator 22 NC 21 C7=1uF NC 20 CP 19 FB 15 18 NC NC 16 17 V -OUT [Pin 10] C10=10uF NJW1241 TEST CIRCUIT (VNO) IN1 C1=1uF OUT1A Mute 1 REF1 50kΩ Mute 2 IN2 C2=1uF Mute 50kΩ Mute 4 Mute 50kΩ Mute 7 100kΩ Gain Select 6dB/8dB 100kΩ RL=47kΩ 28 RL=47kΩ 27 RL=47kΩ Bias 9 V +A V+ 25 + MUTE _TC C8=1uF V -IN C9=1uF C10=10uF 24 V -OUT CN 10 23 RegCNT GND 11 22 Negative Voltage Regulator R2=680kΩ NC 12 NC C7=1uF 21 NC NC 13 20 CLK CP 14 19 V +Reg C6=1uF 29 26 Pop Noise Suppression 8 V+ RL=47kΩ GND MUTE C5=1uF 30 OUT3B 6 GAIN RL=47kΩ V OUT3A 5 REF3 31 OUT2B IN3 C3=1uF RL=47kΩ V OUT2A 3 REF2 32 OUT1B FB 15 18 NC NC 16 17 V -OUT [Pin 10] TEST CIRCUIT (CS) IN1 C1=1uF OUT1A Mute 1 REF1 50kΩ Mute 2 IN2 C2=1uF Mute 50kΩ Mute 4 Mute 50kΩ Mute 6 100kΩ Gain Select 6dB/8dB 100kΩ V-IN V Bias V -OUT 11 R2=680kΩ NC 12 NC 13 CLK 14 V +Reg C6=1uF RL=47kΩ 28 RL=47kΩ 27 RL=47kΩ V+A V+ 25 + MUTE _TC C8=1uF C9=1uF C10=10uF 24 CN 10 23 RegCNT + 29 26 Pop Noise Suppression 8 C5=1uF RL=47kΩ GND 7 9 30 OUT3B MUTE GAIN RL=47kΩ V OUT3A 5 REF3 31 OUT2B IN3 C3=1uF RL=47kΩ V OUT2A 3 REF2 32 OUT1B GND Negative Voltage Regulator 22 NC 21 C7=1uF NC 20 CP 19 FB 15 18 NC NC 16 17 V -OUT [Pin 10] –7– NJW1241 APPLICATION CIRCUIT IN1 C1=1uF OUT1A Mute 1 REF1 50kΩ IN2 50kΩ IN3 Mute 50kΩ Mute 7 GAIN 100kΩ Gain Select 6dB/8dB 100kΩ - V IN 9 R1=10Ω C5=1uF Bias - V OUT 10 11 R2=680kΩ NC 12 V+ 25 + MUTE _TC C8=1uF C9=1uF C10=100uF 24 23 GND Negative Voltage Regulator 22 NC 21 NC 20 V+Reg RL=47kΩ V+A 13 14 RL=47kΩ 27 NC CLK C6=1uF 28 CN RegCNT V+ RL=47kΩ 26 Pop Noise Suppression 8 C4=1uF 29 GND MUTE R3=1kΩ RL=47kΩ OUT3B 6 3V~V+ 30 OUT3A 5 REF3 RL=47kΩ OUT2B Mute 4 C3=1uF 31 OUT2A Mute 3 REF2 RL=47kΩ OUT1B Mute 2 C2=1uF 32 C7=1uF CP 19 FB 15 18 NC NC 16 17 V-OUT [Pin 10] [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. –8–