NJM2174 AUDIO LINE AMPLIFIER with MUTE FUNCTION ■ GENERAL DESCRIPTION ■ PACKAGE OUTLINE The NJM2174 is a low voltage audio line amplifier designed for audio items. Internal closed loop voltage gain is suitable for amplifier of small line signal in digital audio items. It includes mute circuit which realizes very low turn-noise at power on/off. It is suitable for digital audio items with line out. NJM2174V ■ FEARTURES ● Operating Voltage ● Operating Current ● Maximum Output Voltage ● Closed Loop Voltage Gain 4.5 to 5.5V + 2.5mA typ. at V =5V 4dBV typ. at THD=0.1% 3.5dB typ. at f=1kHz 2.5dB typ. at f=100kHz ● Mute Function -85dB typ. ● Supply Voltage Rejection Ratio 60dB typ.) ● Bipolar Technology ● Package Outline SSOP14 ■ PIN CONFIGURATION 1 14 2 13 3 12 4 11 5 10 6 9 7 8 PIN FUNCTION 8. BIAS 1. GND 9. NC 2. NC 10. NC 3. OUT-R 11. IN-L 4. MUTE 1 12. OUT-L 5. MUTE 2 13. NC 6. MUTE C + 14. V 7. IN-R NJM2174V ■ BLOCK DIAGRAM GND 1 14 V+ NC 2 13 NC OUT-R 3 12 OUT-L MUTE1 4 11 IN-L MUTE2 5 MUTEC 6 IN-R 7 10 NC MUTE 9 NC BIAS 8 BIAS NJM2174 ■ ABSOLUTE MAXIMUM RATINGS RARAMETER SYMBOL + Supply Voltage V Power Dissipaation PD Operating Temperature Range Topr Storage Temperature Range Tstg + ■ ELECTRICAL CHARACTERISTICS PARAMETER (Ta=25°C) UNIT V mW °C °C RATINGS 7 300 -20 to +75 -40 to +125 (V =5V, VIN=-3dBV, RL=47kΩ, f=1kHz, Ta=25°C) SYMBOL TEST CONDITION + MIN. TYP. MAX. UNIT 4.5 5.0 5.5 V Operating Voltage Range V Operating Current ICC No signal - 2.5 4.5 mA Reference Voltage VREF No signal 2.0 2.3 2.6 V Closed Loop Voltage Gain1 GV1 2.5 3.5 4.5 dB Closed Loop Voltage Gain2 GV2 -7.0 -2.5 -2.0 dB Channel Gain Balance ∆GV -0.5 0 0.5 dB Maximum Output Voltage VOM 3 4 - dBV Total Harmonic Distortion THD - 0.005 0.01 % Output Noise Voltage VNO Rg=0Ω, A-Weighted - -95 -88 dBV Mute Level MUTE VO/VIN - -85 -70 dB 70 90 - dB 45 60 - dB 2.0 - V V 0 - 0.3 V Channel Separation CS Supply Voltage Rejection SVR Ratio High Level Input Voltage VIH Low Level Input Voltage f=100kHz THD=0.1% VRP=-20dBV, Rg=0Ω VIL ■ CONTROL TERMNAL MUTE1(4pin) MUTE2(5pin) STATUS L L IC doesn’t output the signal. L H IC doesn’t output the signal. H L IC set up 3.5dB typ. voltage gain. H H IC doesn’t output the signal. + NJM2174 MEMO [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.