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參數(shù)資料
| 型號： | TEA1097TV |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 無繩電話/電話 |
| 英文描述： | Speech and loudspeaker amplifier IC with auxiliary inputs/outputs and analog multiplexer |
| 中文描述： | TELEPHONE SPEECH CKT, PDSO40 |
| 封裝： | PLASTIC, SOT-158-1, VSOP-40 |
| 文件頁數(shù)： | 13/36頁 |
| 文件大小： | 167K |
| 代理商： | TEA1097TV |
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1999 Apr 08
13
Philips Semiconductors
Product specification
Speech and loudspeaker amplifier IC with
auxiliary inputs/outputs and analog multiplexer
TEA1097
Base microphone channel (pins TXIN, GATX, TXOUT
and GNDTX
) see Fig.7
The TEA1097 has an asymmetrical base microphone
input TXIN with an input resistance of 20 k
.
The DC biasing of the input is 0 V.
The output TXOUT is biased at two diodes voltage and has
a current capability equal to 20
μ
A (RMS). The gain of the
microphone amplifier (from pins TXIN to TXOUT) can be
adjusted from 0 to 31 dB to suit specific application
requirements.
The gain is proportional to the value of R
GATX
and equals
14.85 dB with R
GATX
= 30.1 k
. Without limitation from the
output, the microphone input stage can accommodate
signals up to 18 mV (RMS) at room temperature for 2% of
THD.
A capacitor can be connected in parallel with R
GATX
to
provide a 1st-order low-pass filter.
Fig.7 Base microphone channel.
The pin numbers given in parenthesis refer to the TEA1097H.
handbook, full pagewidth
MGL395
V
I
I
V
CMIC
VBB
RMIC
TXIN
GNDTX
TXOUT
GATX
29
(27)
30
(28)
28
(26)
31
(29)
RGATX
CGATX
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