njw2174 audio line amplifier with mute function general description package outline feartures operating voltage 4.5 to 5.5v operating current 2.5ma typ. at v + =5v maximum output voltage 4dbv typ. at thd=0.1% closed loop voltage gain 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 2 3 4 5 12 13 14 6 7 11 10 9 8 njm2174v block diagram bias 1 2 3 4 14 13 12 11 mute gnd nc mute1 out-r nc out-l in-l v + 6 7 10 nc 9 nc 8 bias 5 mute2 mutec in-r njm2174v 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 di g ital audio items with line out. 8. bias 9. nc 10. nc 11. in-l 12. out-l 13. nc 14. v + pin function 1. gnd 2. nc 3. out-r 4. mute 1 5. mute 2 6. mute c 7. in-r
njw2174 absolute maximum ratings (ta=25 c) rarameter symbol ratings unit supply voltage v + 7 v power dissipaation p d 300 mw operating temperature range topr -20 to +75 c storage temperature range tstg -40 to +125 c electrical characteristics (v + =5v, v in =-3dbv, r l =47k ? , f=1khz, ta=25 c) parameter symbol test condition min. typ. max. unit operating voltage range v + 4.5 5.0 5.5 v operating current i cc no signal - 2.5 4.5 ma reference voltage v ref no signal 2.0 2.3 2.6 v closed loop voltage gain1 g v 1 2.5 3.5 4.5 db closed loop voltage gain2 g v 2 f=100khz -7.0 -2.5 -2.0 db channel gain balance ? g v -0.5 0 0.5 db maximum output voltage v om thd=0.1% 3 4 - dbv total harmonic distortion thd - 0.005 0.01 % output noise voltage v no rg=0 ? , a-weighted - -95 -88 dbv mute level mute v o /v in - -85 -70 db channel separation cs 70 90 - db supply voltage rejection ratio svr v rp =-20dbv, rg=0 ? 45 60 - db high level input voltage v ih 2.0 - v + v low level input voltage v il 0 - 0.3 v 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.
njw2174 application circuit bias 1 2 3 4 14 13 12 11 mute out-r out-l in-l v + 6 7 10 nc 9 nc 8 h 5 in-r 40k ? 20k ? 135k ? 40pf 135k ? 40k ? 135k ? 40pf 20k ? 135k ? h l l nc nc 10 f 10 f4.7 f 10 f 10 f 1 f
njw2174 ! terminal description no. symbol function equivalent circuit voltage 1 gnd ground terminal 0v 2 nc 3 12 out-r out-l rch output lch output 2.3v 4 5 mute1 mute2 mute switch terminal 1 mute switch terminal 2 - 6 mutec pop noise reduction for mute switch - 7 11 in-r in-l rch input lch input v+/2 10p vcc 65k 300 20k vcc 50k vcc 150k vre f vcc 40p 135k 135k 50k
njw2174 ! terminal description no. symbol function equivalent circuit voltage 8 bias reference voltage 2.3v 9 nc 10 nc 13 nc 14 v + power supply terminal v + 2k 40k 130k
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