參數(shù)資料
型號(hào)： TS489
廠商： 意法半導(dǎo)體
英文描述： Pop-free 120mW stereo headphone amplifier
中文描述： 流行無120mW立體聲耳機(jī)放大器
文件頁數(shù)： 27/32頁
文件大?。?/td> 465K
代理商： TS489
TS488-TS489
Application information
27/32
With the values above, the result is F
CL
=25Hz.
In this case,
τ
in
=
R
in
x C
in
=6.6ms.
This value is sufficient with regard to the previous formula, thus we can state that the pop is
imperceptible.
Connecting the headphones
Generally headphones are connected using jack connectors. To prevent a pop in the
headphones when plugging in the jack, a pulldown resistor should be connected in parallel
with each headphone output. This allows the capacitors C
out
to be charged even when the
headphones are not plugged in.
Pulldown resistors with a value of 1 k
Ω
are high enough to be a negligible load, and low
enough to charge the capacitors C
out
in less than one second.
The pop&click reduction circuitry works properly only when both channels have the same
value for the external components C
in
, C
out
, R
load
and R
pulldown
.
Note:
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