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參數(shù)資料
| 型號(hào)： | TEA7088AFP |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | LOW-RANGE PHONE DEDICATED CHIP |
| 中文描述： | 低檔手機(jī)專(zhuān)用芯片 |
| 文件頁(yè)數(shù)： | 5/17頁(yè) |
| 文件大小： | 184K |
| 代理商： | TEA7088AFP |
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ELECTRICALSPECIFICATIONS
(continued)
AC Characteristics
(T
amb
= 25
°
C ; R
L
= 600
; Logic in Default Mode unless otherwise noted)
Symbol
R1
Parameter
Test Conditions
Min.
17
Typ.
Max.
Unit
dB
Return Loss
Test 2, I
= 22mA
f = 300/3400Hz,V
AC
= -10dBV
TransmitCharacteristics
(T
amb
= 25
°
C; R
L
= 600
; f = 1kHz ; Logic in Default Mode unlessotherwisenoted)
Symbol
Gtx
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
Gtxl
Gtxs
Zmic
Ntx
Microphone Gain
Test 3, V
m
= -55dBV
R8 = 1.3k
, R25 = 3.9k
I
L
= 22mA
I
L
= 90mA
between MIC1 & MIC2
Test 3, 2k
on microphone inputs,
I
L
= 22mA
Test 3, V
m
= -55dBV, I
L
= 22mA
Test 3, I
= 22mA, see Figure 2
V
m
= -41dBV
V
m
= -34dBV
45
38
32
46
40
40
-76
47
42
48
dB
dB
k
Microphone Input Impedance
Noise
dBmp
Mmic
Microphone Mute
Soft Clipping
- Distortion
- Maximum Level on Line
60
dB
Dtx
V
L
Max.
1.5
2
%
Vp
The maximum gain Gtl is adjustable between 44
and 56dBwith R8 :
Gtxl
=
20log
TheAGCvariationisprogrammedwithoneresistor
connected on Pin AGC. I
SL
is the line current at
whichthe gain must be decreasedby 6dB.
820
R10//
R
L
+
R11
R8 // 50k
R25
() =
300
I
SL
5mA(R25 > 2.6k
)
For line current lower than I
LL
or higher than I
SL
,
The transmit and receive gains have a constant
value.
If no resistor or a resistor higher than 300k
is
connected on Pin AGC, the gain is constant and
equal to Gtxl and Grxl.
±
0.5dB.
AGC can be inhibited also through MCU code
”010100”. In this case Tx and Rx gains are fixed
2dB lower thanthe maximum gain.
The minimumsaturationvoltageof theTEA7088A
respect to ground is 2.2V. On long line, when the
voltage over TEA7088A is low, the softclipping
function automatically limits the AC dynamic to
avoidto reachthe 2.2Vlimiton TEA7088Arespect
to ground.
0.1
1
10
100
0.1
1
10
Threshold
Level
V
microphone
peak (mV)
V
A
p
-2
-5
-10
-15
7
Figure 2 :
Softclipping
0
20
40
60
80
100
0
2
4
6
10
V
L
(
V
AC
peak
I
L
(mA)
8
V
AC
peak
7
Figure 3
TEA7088A
5/17
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|---|---|
| TEA7089A | Low-Range Phone Dedicated Chip(電話模擬前端) |
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| TEA7089AFP | LOW-RANGE PHONE DEDICATED CHIP |
| TEA7091 | Telephone Analog Front End(電話模擬前端) |
| TEA7092 | TELEPHONE ANALOG FRONT END |
相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| TEA7089 | 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:LOW-RANGE PHONE DEDICATED CHIP |
| TEA7089A | 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:LOW-RANGE PHONE DEDICATED CHIP |
| TEA7089AFP | 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:LOW-RANGE PHONE DEDICATED CHIP |
| TEA7091 | 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:TELEPHONE ANALOG FRONT END |
| TEA7092 | 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:TELEPHONE SET INTEGRATED CIRCUIT |
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