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參數(shù)資料
| 型號： | AS2525B |
| 廠商： | AUSTRIAMICROSYSTEMS AG |
| 元件分類： | 無繩電話/電話 |
| 英文描述： | Single Chip Speaker Phone |
| 文件頁數(shù)： | 10/27頁 |
| 文件大?。?/td> | 459K |
| 代理商： | AS2525B |
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Datasheet AS2525
austria
micro
systems
Revision 2.1
Page 10 of 27
Side-Tone
A good side-tone cancellation can be achieved by using
the following equation:
Z
BAL
/Z
LINE
= 10
This is assuming that the side-tone reference resistor, R2
(between LI and STB) is 300
and R1 is 30
.
Z
LINE
R1 = 30 ohm
R2 = 300 ohm
Z
BAL
Figure 5: Side-tone balance
Transmit Path
The gain of the M1/M2 —> LS path is default set to 37 dB.
This gain can be changed from 30 dB to 45 dB in 1 dB
steps by set-up programming.
Table 8: Handset Tx gain setting
[PG] + [0] + (Password) + [0] + [1] + (x) + [PG]
Key
(x)
[0]
[1]
[2)
[3]
[4]
[5]
[6]
[7]
Tx Gain (dB)
M1/2 to LS
30
31
32
33
34
35
36
37
Key
(x)
[8]
[9]
[M1]
[M2]
[M3]
[M4]
[M5]
[M6]
Tx Gain (dB)
M1/2 to LS
38
39
40
41
42
43
44
45
The input is differential with an impedance of 10 k
. The
soft clip circuit limits the output voltage swing at pin LS to
2 V
PEAK
when activated.
Table 9: Handset Tx soft clipping selection
[PG] + [0] + (Password) + [#] + [4] + (digit) + [PG]
Digit
[0]
[1]
Handset Tx Soft Clipping
Disabled
Enabled
(2 V
PEAK
)
There is optional LLC for this path.
The gain of the M3/M4 —> LS path is default set to 46 dB.
This gain can be changed from 39 dB to 54 dB in 1 dB
steps by set-up programming.
Table 10: Handsfree Tx gain setting
[PG] + [0] + (Password) + [0] + [3] + (x) + [PG]
Key
(x)
[0]
[1]
[2]
[3]
[4]
[5]
[6]
[7]
Tx Gain (dB)
M3/4 to LS
39
40
41
42
43
44
45
46
Key
(x)
[8]
[9]
[M1]
[M2]
[M3]
[M4]
[M5]
[M6]
Tx Gain (dB)
M3/4 to LS
47
48
49
50
51
52
53
54
The input is differential with an impedance of 10 k
.
The soft clip circuit limits the output voltage swing at pin
LS to 2 V
PEAK
when activated
.
Table 11: Handsfree Tx soft clipping selection
[
PG] + [0] + (Password) + [9] + [2] + (digit) + [PG]
Digit
[0]
[1]
Handsfree Tx Soft Clipping
Disabled
Enabled
(2 V
PEAK
)
There is no LLC option for this path.
Receive Path
The gain of the LS —> RO receive path is default set to 1
dB. This gain can be changed from -6 dB to 9 dB in 1 dB
steps by set-up programming.
Table 12: Handset Rx gain setting
[PG] + [0] + (Password) + [0] + [2] + (x) + [PG]
Key
(x)
[0]
[1]
[2]
[3]
[4]
[5]
[6]
[7]
Rx Gain (dB)
LS to RO
-6
-5
-4
-3
-2
-1
0
1
Key
(x)
[8]
[9]
[M1]
[M2]
[M3]
[M4]
[M5]
[M6]
Rx Gain (dB)
LS to RO
2
3
4
5
6
7
8
9
When the handset volume control is enabled (see Table 3:
Parameter settings), the user can also change the gain
within this range in 4 dB steps via the [V+]/[V-] keys. The
default receive gain in handset and headset mode must lie
between position 5 and 9 for correct operation of the
volume control. The receive input is the differential signal
of RI and STB. The soft clip circuit limits the output voltage
at RO to 1 V
PEAK
. It prevents harsh distortion and acoustic
shock.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AS2525 | Single-Chip Handsfree Phone CMOS Integrated Circuit |
| AS2534ET | Multi-Standard CMOS Single Chip Telephone IC with Dual Soft Clipping |
| AS2535 | Multi-Standard CMOS Single Chip Telephone IC with Dual Soft Clipping |
| AS2535P | Multi-Standard CMOS Single Chip Telephone IC with Dual Soft Clipping |
| AS2535T | Multi-Standard CMOS Single Chip Telephone IC with Dual Soft Clipping |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AS2525B-T | 功能描述:IC HANDSFREE TELEPH CMOS 44-TQFP RoHS:是 類別:集成電路 (IC) >> 接口 - 濾波器 - 有源 系列:* 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1,000 系列:- 濾波器類型:連續(xù)時(shí)間，帶通低通 頻率 - 截止或中心:150kHz 濾波器數(shù):4 濾波器階數(shù):8th 電源電壓:4.74 V ~ 11 V，±2.37 V ~ 5.5 V 安裝類型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:28-SOIC W 包裝:帶卷 (TR) |
| AS2525-DB | 制造商:AMS 功能描述:BOARD DEMO FOR AS2525 制造商:ams 功能描述:AS2525 Demo Board |
| AS2525F | 制造商:AMSCO 制造商全稱:austriamicrosystems AG 功能描述:Single-Chip Handsfree Phone CMOS Integrated Circuit |
| AS2525Q | 制造商:AMSCO 制造商全稱:austriamicrosystems AG 功能描述:Single-Chip Handsfree Phone CMOS Integrated Circuit |
| AS252R3FLF | 制造商:TT Electronics / IRC 功能描述:AS252R3FLF |
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