參數(shù)資料
型號(hào)： TEA1093T
廠商： NXP SEMICONDUCTORS
元件分類(lèi)： 通信及網(wǎng)絡(luò)
英文描述： Hands-free IC
中文描述： SPECIALTY TELECOM CIRCUIT, PDSO28
封裝： 7.50 MM, PLASTIC, SOT-136-1, MS-013AE, SO-28
文件頁(yè)數(shù)： 9/28頁(yè)
文件大小： 208K
代理商： TEA1093T
1996 Feb 09
9
Philips Semiconductors
Product specification
Hands-free IC
TEA1093
Fig.7 Loudspeaker channel.
handbook, full pagewidth
MGD222
V
I
1
I V
RGAR
GAR
LSP1
LSP2
DLC/MUTER
CDLC
CLSP1
1
4
6
5
to/from
voice switch
to
envelope
detector
to
logic
RIN2
RIN1 2
3
11
from
TEA106X
VOL
VOLUME
CONTROL
DYNAMIC
LIMITER
from voltage
stabilizer
RVOL
Loudspeaker channel
L
OUDSPEAKER AMPLIFIER
:
PINS
RIN1, RIN2, GAR, LSP1
AND
LSP2
The TEA1093 has symmetrical inputs for the loudspeaker
amplifier with an input resistance of 40 k
between RIN1
and RIN2 (2
×
20 k
). The input stage can accommodate
signals up to 390 mV (RMS) at room temperature for 2% of
total harmonic distortion (THD). The gain of the input stage
varies according to the mode of the TEA1093. In the
receive mode, the gain is at its maximum; in the transmit
mode, it is at its minimum and in the idle mode, it is halfway
between maximum and minimum. Switch-over from one
mode to the other is smooth and click-free. The rail-to-rail
output stage is designed to power a loudspeaker which is
connected as a single-ended load (between LSP1 and
GND) or as a bridge-tied load (between LSP1 and LSP2).
In the receive mode, the overall gain of the loudspeaker
amplifier can be adjusted from 3 dB up to 39 dB to suit
specific application requirements. The gain from RIN1 or
RIN2 to LSP1 is proportional to the value of R
GAR
and
equals 18 dB with R
GAR
= 66.5 k
. The second output
LSP2 is in opposite phase with LSP1. Therefore, in the
basic application, the gain between RIN1-RIN2 to
LSP1-LSP2 equals 24 dB typical with R
GAR
= 66.5 k
.
A capacitor connected in parallel with R
GAR
can be used to
provide a first-order low-pass filter.
V
OLUME CONTROL
:
PIN
VOL
The loudspeaker amplifier gain can be adjusted with the
potentiometer R
VOL
. A linear potentiometer can be used to
obtain logarithmic control of the gain at the loudspeaker
amplifier. Each 950
increase of R
VOL
results in a gain
loss of 3 dB. The maximum gain reduction with the volume
control is internally limited to the switching range.
D
YNAMIC LIMITER
:
PIN
DLC/MUTER
The dynamic limiter of the TEA1093 prevents clipping of
the loudspeaker output stages and protects the operation
of the circuit when the supply condition falls below a
certain level.
Hard clipping of the loudspeaker output stages is
prevented by rapidly reducing the gain when the output
stages start to saturate. The time in which gain reduction
is effected (clipping attack time) is approximately a few
milliseconds. The circuit stays in the reduced gain mode
until the peaks of the loudspeaker signals no longer cause
saturation. The gain of the loudspeaker amplifier then
returns to its normal value within the clipping release time
(typical 250 ms). Both attack and release times are
proportional to the value of the capacitor C
DLC
. The total
harmonic distortion of the loudspeaker output stages, in
reduced gain mode, stays below 5% up to 10 dB
(minimum) of input voltage overdrive [providing V
RIN
is
below 390 mV (RMS)].
相關(guān)PDF資料
PDF描述
TEA1094 Hands free IC
TEA1094A Hands free IC
TEA1094AM Hands free IC
TEA1094AT Hands free IC
TEA1094T Hands free IC
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TEA1094 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Hands free IC
TEA1094A 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Hands free IC
TEA1094AM 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Hands free IC
TEA1094AT 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Hands free IC
TEA1094T 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Hands free IC
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*