參數(shù)資料
型號(hào)： AS2525B
廠商： AUSTRIAMICROSYSTEMS AG
元件分類(lèi)： 無(wú)繩電話/電話
英文描述： Single Chip Speaker Phone
文件頁(yè)數(shù)： 11/27頁(yè)
文件大?。?/td> 459K
代理商： AS2525B
Datasheet AS2525
austria
micro
systems
Revision 2.1
Page 11 of 27
Table 13: Handset Rx soft clipping selection
[PG] + [0] + (Password) + [#] + [5] + (digit) + [PG]
Digit
[0]
[1]
Handset Rx Soft Clipping (Earpiece)
Disabled
Enabled
There is LLC option for this path.
The gain of the LS —> LO1/LO2 receive path is set to 29
dB.
This gain can be changed by set-up programming from 22
dB to -37 dB in 1 dB steps.
Table 14: Loudspeaker gain setting
[PG] + [0] + (Password) + [0] + [4] + (x) + [PG]
Key
(x)
[0]
[1]
[2]
[3]
[4]
[5]
[6]
[7]
Rx Gain (dB)
LS to LO1/2
22
23
24
25
26
27
28
29
Key
(x)
[8]
[9]
[M1]
[M2]
[M3]
[M4]
[M5]
[M6]
Rx Gain (dB)
LS to LO1/2
30
31
32
33
34
35
36
37
The user can also change the gain using the [V+]/[V-] keys
(see section "Handsfree"). The volume range is 20 dB (8
steps, each 2.5 dB).
The receive input is the differential signal of RI and STB.
The soft clip circuit limits the output voltage swing at
LO1/LO2 to 1 V
PEAK
.
Table 15: Loudspeaker soft clipping selection
[PG] + [0] + (Password) + [9] + [3] + (digit) + [PG
]
Digit
[0]
[1]
Handsfree Rx Soft Clipping (Loudspeaker)
Disabled
Enabled
There is optional LLC for this path.
Line Loss Compensation (LLC)
The line loss compensation is set-up programmable and
effects only the handset mode.
Table 16: Line loss compensation selection
[PG] + [0] + (Password) + [0] + [5] + (digit) + [PG]
Digit
[0]
[1]
[2]
LLC Range
No LLC
(gain independent of line current)
-1 dB/5 mA from 20 to 50 mA
-1 dB/5 mA from 45 to 75 mA
When it is activated, the transmit and receive gains for
both channels are decreased by 6 dB at line currents from
20 mA to 50 mA or from 45 mA to 75 mA depending on
selected range.
Handsfree
The handsfree function allows voice communication without
using the handset (full 2-way speaker phone). Two voice
controlled attenuators prevent acoustic coupling between
the loudspeaker and the handsfree microphone.
The voice switching circuit has three states, namely idle,
transmit or receive. In receive mode the attenuation of the
receive path and the transmit path can be controlled by the
volume keys between 0 dB and -20 dB. The following table
(Table 18: Handsfree attenuation scheme) shows how
voice switching is controlled.
TX_atten
Backgnd
noise
monitor
Voice
switching
speech
RX
voice switching circuit
Figure 6: Handsfree voice switching
A background monitoring circuit is incorporated. This
circuit can be enabled/disabled as required
.
Table 17: Background noise monitoring selection
[PG] + [0] + (Password) + [#] + [6] + (digit) + [PG]
Digit
[0]
[1]
Background Noise Monitoring
Disabled
Enabled
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(lèi)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(lèi)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(lèi)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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