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參數(shù)資料
| 型號(hào)： | TEA1093T |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 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)： | 7/28頁(yè) |
| 文件大?。?/td> | 208K |
| 代理商： | TEA1093T |
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1996 Feb 09
7
Philips Semiconductors
Product specification
Hands-free IC
TEA1093
Supply: pins SUP, SREF, V
BB
, GND, VA and PD
As can be seen from Fig.4, the line current is divided
between the speech-transmission circuit (I
TR
+ I
CC
) and
the TEA1093 circuit (I
SUP
). It can be shown that:
I
SUP
= I
line
I
TR
I
CC
Where:
I
TR
= V
SUP
V
SREF
/R
SREF
V
SUP
V
SREF
= 315 mV
R
SREF
= 100
I
CC
≈
1 mA
It follows that I
SUP
≈
I
LINE
4 mA.
The TEA1093 stabilizes its own supply voltage of 3.6 V at
V
BB
. The voltage on V
BB
can be adjusted by means of an
external resistor R
VA
.
When R
VA
is connected between pin V
A
and GND, the
voltage on V
BB
is increased, when connected between
pin V
A
and V
BB
, it is decreased. This is shown in Fig.5.
Two capacitors of 4.7 nF (C
SREF
and C
STAB
) are required
to ensure stability of the supply block. When V
SUP
is
greater than V
BB
+ 0.4 V, the current I
SUP
is supplied to
V
BB
via TR1. When V
SUP
is less, the current is shunted to
GND via TR2, which prevents distortion on the line.
To reduce current consumption during pulse dialling or
register recall (flash), the TEA1093 is provided with a
power-down (PD) input. When the voltage on PD is HIGH,
the current consumption from SUP is 55
μ
A and from
V
BB
400
μ
A. Therefore a capacitor of 470
μ
F (C
VBB
) is
sufficient to power the TEA1093 during pulse dialling.
Fig.4 Supply arrangement.
handbook, full pagewidth
CSTAB
315 mV
TR1
SUP
9
7
8
SREF
CSREF
4.7 nF
RSREF
100
LN
VCC
SLPE
VEE
GND
4.7 nF
PD
VA
MGD219
15
17
10
VBB
RVA
CVBB
470
μ
F
TR2
to dynamic
limiter
VOLTAGE
STABILIZER
TEA106X
TEA1093
POWER
DOWN
SWITCH
V
V
line
ISUP
ITR
ICC
Iline
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| 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) |
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|---|---|
| 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 |
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