參數(shù)資料
型號(hào)： AK2303LV
廠商： Asahi Kasei Microsystems Co.,Ltd
元件分類： 圓形連接器
英文描述： Circular Connector; No. of Contacts:15; Series:MS27484; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:14; Circular Contact Gender:Socket; Circular Shell Style:Straight Plug; Insert Arrangement:14-15 RoHS Compliant: No
中文描述： 雙交換機(jī)的PCM編解碼器的模擬線路卡
文件頁(yè)數(shù)： 8/41頁(yè)
文件大小： 559K
代理商： AK2303LV
ASAHI K ASEI
[AK 2303LV]
CIRCUIT DESCRIPTION
Block
AMPT0,1
Op-amp for input gain adjustment. The gain is adjusted with external resistors.
The resistor larger than 10k
is recommended for the feedback resistor.
AMPR0,1
Op-amp for output gain adjustment. This op-amp is used as an inverting
amplifier. The gain is adjusted with external resistors. The resistor larger than
10k
is recommended for the feedback resistor.
AAF0,1
Integrated anti-aliasing filter which prevents signals around the sampling rate
from folding back into the voice band. AAF is a 2nd order RC low-pass filter.
A/D
Converts analog signal to 8bit PCM data according to the companding schemes of
ITU recommendation G.711; A-law or u-law. The band limiting filter is also
integrated. The selection of companding schemes is set by ALAWN register or
hard pin as follows:
"H": u-Law
"L": A-Law
D/A
E xpands 8bit PCM data according to A-law or u-law. The selection of
companding schemes is set by ALAWN register or hard pin as follows:
"H": u-Law
"L": A-Law
SMF
E xtracts the inband signal from D/A output. It also corrects the sinx/x effect of
D/A output.
BGREF
Provides the stable analog ground voltage using an on-chip band-gap reference
circuit which is temperature compensated. The output voltage is 1.5V for +3.3V
operation.
GA0T/R
GA1T/R
GATN
SERIAL I/F
Interface to the internal register by using SCLK , DATA, and
CSN
pins.
PLL
PLL generates system clock of AK 2303LV. Reference clock is BCLK . More than
0.22uF capacitance should be connected between LPC and VSS as a PLL Loop
filter.
PCM I/F
PCM data rate is available for 4.096, 2.048MHz which synchronizes with BCLK .
Three kinds of data format (Long Frame, Short Frame,GCI) are available.
Data format is selected by the register “PCM IF”.
PCM IF = “L” LongFrame or ShortFrame (LF/SF are selected automatically)
PCM IF = “H” GCI
PCM data stream, which includes B1 and B2 data, is output through DX pin
and input through DR pin. B2 PCM data stream always follows B1 PCM data
stream.
B1/B2 and Ch0/Ch1 assignment is changed by the SE L2B
2303-E -00 8 2001/09
Function
Gain selects of analog I/O signals. It is posibble to select gain from +6dB to -18dB
(1dB/step). Gain is defined by the internal register.
相關(guān)PDF資料
PDF描述
AK2305 Dual PCM CODEC for ISDN TERMINAL ADAPTER
AK2306 Dual PCM CODEC for ISDN/VoIP TERMINAL ADAPTER
AK2306LV Dual PCM CODEC for ISDN/VoIP TERMINAL ADAPTER
AK2307 SPEECH CODEC for Digital Key telephone (5.0V/3.3V)
AK2307LV SPEECH CODEC for Digital Key telephone (5.0V/3.3V)
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AK2303LVM 制造商:AKM 制造商全稱:AKM 功能描述:PBX???è￡??????￠?????-??°?????¤??3???????????¨????????￡??3?????? ??°??￡??-??3???????????ˉ ?????3???
AK2304 制造商:未知廠家 制造商全稱:未知廠家 功能描述:A-Law/u-Law CODEC
AK2304A 制造商:AKM 制造商全稱:AKM 功能描述:QUAD PCM CODEC/FILTER COMBO LSI
AK2305 制造商:AKM 制造商全稱:AKM 功能描述:Dual PCM CODEC for ISDN TERMINAL ADAPTER
AK2306 制造商:AKM 制造商全稱:AKM 功能描述:Dual PCM CODEC for ISDN/VoIP TERMINAL ADAPTER
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