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參數(shù)資料
| 型號： | TEA1098ATV |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 無繩電話/電話 |
| 英文描述： | Speech and handsfree IC |
| 中文描述： | TELEPHONE SPEECH CKT, PDSO40 |
| 封裝： | PLASTIC, VSOP-40 |
| 文件頁數(shù)： | 8/40頁 |
| 文件大?。?/td> | 185K |
| 代理商： | TEA1098ATV |
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2000 Mar 21
8
Philips Semiconductors
Preliminary specification
Speech and handsfree IC
TEA1098A
Fig.4 Line interface principle.
handbook, full pagewidth
MGM298
TN2
TR2
TR1
E2
D1
D1
R3
R2
R1
TN1
TP1
J2
J1
E1
GND
GND
VBB
from
preamp
GND
REG
SLPE
CREG
4.7
μ
F
RSLPE
20
As can be seen from Fig.4, the internal circuitry is supplied
by pin V
BB
, which is a strong supply point combined with
the line interface. The line current is flowing through the
R
SLPE
resistor and is sunk by the V
BB
voltage stabilizer,
thus becoming available for a loudspeaker amplifier or any
peripheral IC. Its voltage is equal to 3.0 V for line currents
lower than 18 mA. It than increases linearly with the line
current and reaches the value of 5.3 V for line currents
greater than 45 mA. It is temperature compensated.
The aim of the current switch TR1 and TR2 is to reduce
distortion of large AC line signals. Current I
SLPE
is supplied
to V
BB
via TR1 when the voltage on SLPE is greater than
V
BB
+ 0.25 V. When the voltage on SLPE is lower than this
value, the current I
SLPE
is shunted to GND via TR2.
The reference voltage V
ref
can be increased by connecting
an external resistor between pins REG and SLPE. For
large line currents, this increase can slightly affect some
dynamic performances such as maximum signal level on
the line for 2% THD. The voltage on pin V
BB
is not affected
by this external resistor; see Fig.5 for the main DC
voltages.
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相關代理商/技術參數(shù) |
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| TEA1098H | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Speech and handsfree IC |
| TEA1098TV | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Speech and handsfree IC |
| TEA1098UH | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Speech and handsfree IC |
| TEA1099 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Speech and handsfree IC with auxiliary inputs/outputs and analog multiplexer |
| TEA1099H | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Speech and handsfree IC with auxiliary inputs/outputs and analog multiplexer |
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