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參數(shù)資料
| 型號： | AS2525 |
| 廠商： | AUSTRIAMICROSYSTEMS AG |
| 元件分類： | 無繩電話/電話 |
| 英文描述： | Single-Chip Handsfree Phone CMOS Integrated Circuit |
| 中文描述： | TELEPHONE MULTIFUNCTION CKT, PQFP44 |
| 封裝： | TQFP-44 |
| 文件頁數(shù)： | 11/26頁 |
| 文件大?。?/td> | 264K |
| 代理商： | AS2525 |
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Preliminary
AS2525
Rev. 1.3
Page 11
May 1999
Table 16: Line loss compensation selection
[PG] + [0] + (Password) + [0] + [5] + (digit) + [PG]
Digit
LLC Range
[0]
No LLC
(gain independent of line current)
[1]
-1 dB/5 mA from 20 to 50 mA
[2]
-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 -15 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 9: 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
Background Noise Monitoring
[0]
Disabled
[1]
Enabled
RO
RECI
+3dB
+14dB
Voice
switching
speech
Gmax = -4dB … +16dB (VOL)
Gmin = -33dB
Offset
comp
Compress
Peak
detector
Cmicoffset
+23dB
CBckgnd
Offset
comp
Compress
Peak
detector
CTXoffset
Offset
comp
Compress
Peak
detector
LINE
Gmax = +9dB
Gmin = -21dB … -40dB (VOL)
+12dB
RECV
FT2
FT1
CBN
+8dB
Figure 10: Signal path of handsfree circuit
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| 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 |
| AS2536 | 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 |
|---|---|
| AS2525 DB | 功能描述:AS2525 - Telecom Evaluation Board 制造商:ams 系列:- 零件狀態(tài):停產(chǎn) 主要用途:電信 嵌入式:- 使用的 IC/零件:AS2525 主要屬性:- 輔助屬性:- 所含物品:板 標(biāo)準(zhǔn)包裝:1 |
| AS2525_1 | 制造商:AMSCO 制造商全稱:austriamicrosystems AG 功能描述:Single-Chip Handsfree Phone CMOS Integrated Circuit |
| AS2525B | 功能描述:電信線路管理 IC RoHS:否 制造商:STMicroelectronics 產(chǎn)品:PHY 接口類型:UART 電源電壓-最大:18 V 電源電壓-最小:8 V 電源電流:30 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VFQFPN-48 封裝:Tray |
| 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 |
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