TS489IQT STMicroelectronics, TS489IQT Datasheet - Page 24

IC AMP AUDIO PWR .13W STER 8DFN

TS489IQT

Manufacturer Part Number
TS489IQT
Description
IC AMP AUDIO PWR .13W STER 8DFN
Manufacturer
STMicroelectronics
Type
Class ABr
Datasheet

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
Application information
4.4
24/32
Note:
Higher cut-off frequency
In the high frequency region, you can limit the bandwidth by adding a capacitor C
parallel with R
that F
C
Figure 79. Lower cut-off frequency vs.
Figure 81. Higher cut-off frequency vs. feedback capacitor
feed
100
10k
1k
10
CH
is:
1
is highest frequency to be amplified (with a 3dB attenuation), the maximum value of
In case F
1st order high-pass filter on the input and the 1st order high-pass filter on the
output create a 2nd order high-pass filter in the audio signal path with an
attenuation 6dB on F
input capacitor
feed
. It forms a low-pass filter with a -3dB cut-off frequency F
10
CL
Rin=10k
is kept the same for calculation, It must be taken in account that the
Cin (nF)
Ω
100k
Rin=20k
10k
100
1k
0.01
100
CL
Rin=50k
Ω
Rfeed=40k
F
and a roll-off 40db
CH
Rin=100k
Ω
=
0.1
Rfeed=80k
Ω
--------------------------------------------------
Ω
1000
R
Cfeed
Ω
Figure 80. Lower cut-off frequency vs.
feed
1
1
100
10k
1k
10
(
μ
0.1
F
)
Rfeed=10k
C
decade.
feed
Rfeed=20k
10
output capacitor
Ω
1
Ω
100
Cout (
10
R
L
μ
=16
F)
CH
Ω
R
L
=32
. Assuming
TS488-TS489
Ω
100
feed
R
L
=600
in
Ω
1000

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