TS489IQT STMicroelectronics, TS489IQT Datasheet - Page 27
TS489IQT
Manufacturer Part Number
TS489IQT
Description
IC AMP AUDIO PWR .13W STER 8DFN
Manufacturer
STMicroelectronics
Type
Class ABr
Datasheet
1.TS488IST.pdf
(32 pages)
Specifications of TS489IQT
Output Type
Headphones, 2-Channel (Stereo)
Max Output Power X Channels @ Load
130mW x 2 @ 16 Ohm
Voltage - Supply
2.2 V ~ 5.5 V
Features
Depop, Short-Circuit Protection, Standby
Mounting Type
Surface Mount
Package / Case
8-DFN
For Use With
497-6363 - BOARD DEMO FOR TS489
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
497-5991-2
TS488-TS489
Connecting the headphones
Note:
With the values above, the result is F
In this case, τ
This value is sufficient with regard to the previous formula, thus we can state that the pop is
imperceptible.
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
headphones are not plugged in.
Pulldown resistors with a value of 1 kΩ are high enough to be a negligible load, and low
enough to charge the capacitors C
The pop&click reduction circuitry works properly only when both channels have the same
value for the external components C
in
= R
in
x C
in
=6.6ms.
out
in
CL
, C
in less than one second.
=25Hz.
out
, R
load
and R
pulldown
out
to be charged even when the
.
Application information
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