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向来说说原配的JRC4580,,
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" W6 H6 Q6 e7 b9 ^- Q& o4 O* A* A要二奶前,,应该先了解原配,,,$ w! X1 w9 {$ D3 C, |1 `8 v K) j
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■ GENERAL DESCRIPTION ■ PACKAGE OUTLINE1 ^ F1 M& [- n+ y1 m
NJM4580 is the dual operational amplifier, specially designed+ R: q/ u9 d4 R8 _# a
for improving the tone control, which is most suitable for the
. {. D2 q$ P" N( Z; S5 ~audio application.
1 l/ |' X: E* ?$ G" P9 KFeaturing noiseless, higher gain bandwidth, high output
+ I8 ?; y* E2 Z+ C" U. p' g ^current and low distortion ratio, and it is most suitable not only( o {7 S0 X8 J' L( Q. S& N
for acoustic electronic parts of audio pre-amp and active filter,
0 Q c/ g6 p, _- N8 h0 w! Nbut also for the industrial measurement tools. It is also suitable) O3 |- S0 |+ s, |; L, r" X8 P
for the head phone amp at higher output current, and further/ u$ I, a: d4 v
more, it can be applied for the handy type set operational
% K0 ~) v" _( pamplifier of general purpose in application of low voltage single
: F9 D4 z" |) q, o- |supply type which is properly biased of the low voltage source.
+ g# @& C% w$ m■ FEATURES+ a: u% s8 y! `+ E1 ]% I
● Operating Voltage ( ±2V~±18V )
( K7 T9 [3 d9 P● Low Input Noise Voltage ( 0.8μVrms typ. )
& N f. x7 K u# ], @- _4 T' D& ^7 `● Wide Gain Bandwidth Product ( 15MHz typ. )
4 \8 m, t0 M0 I N: z● Low Distortion ( 0.0005% typ. )
! N6 B- c5 U4 D: ?2 F● Slew Rate ( 5V/μs typ. )
: s1 V: d" v# I9 {$ P( w● Package Outline DIP8,SIP8,EMP8,SSOP8,DMP8/ M+ \4 l2 Q$ d+ J
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9 z* t I6 _- e+ m这是4580的针脚定义,,
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1 _/ I: ^5 g8 O/ ?/ j. Y. u从上图可以看出,,JRC4580在低压下,也就是5V下,
% N& e( Z+ b" f `% c3 f有较好的音质,,总谐波失(THD)真最小,,$ r, g* G$ @% ^, P) c. Z; T% w
这应该是众多声卡选择JRC4580作为运放的原因吧
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[ 本帖最后由 sd-iori 于 2008-3-4 23:13 编辑 ] |
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