- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄373395 > SI3212-BT (Electronic Theatre Controls, Inc.) PROSLIC PROGRAMMABLE CMOS SLIC/CODEC WITH RINGING/BATTERY VOLTAGE GENERATION PDF資料下載
參數(shù)資料
| 型號(hào)： | SI3212-BT |
| 廠商： | Electronic Theatre Controls, Inc. |
| 元件分類： | Codec |
| 英文描述： | PROSLIC PROGRAMMABLE CMOS SLIC/CODEC WITH RINGING/BATTERY VOLTAGE GENERATION |
| 中文描述： | ProSLIC產(chǎn)品可編程的CMOS用戶接口/有振鈴編解碼器/電池電壓生成 |
| 文件頁(yè)數(shù)： | 41/122頁(yè) |
| 文件大?。?/td> | 1950K |
| 代理商： | SI3212-BT |
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)第11頁(yè)第12頁(yè)第13頁(yè)第14頁(yè)第15頁(yè)第16頁(yè)第17頁(yè)第18頁(yè)第19頁(yè)第20頁(yè)第21頁(yè)第22頁(yè)第23頁(yè)第24頁(yè)第25頁(yè)第26頁(yè)第27頁(yè)第28頁(yè)第29頁(yè)第30頁(yè)第31頁(yè)第32頁(yè)第33頁(yè)第34頁(yè)第35頁(yè)第36頁(yè)第37頁(yè)第38頁(yè)第39頁(yè)第40頁(yè)當(dāng)前第41頁(yè)第42頁(yè)第43頁(yè)第44頁(yè)第45頁(yè)第46頁(yè)第47頁(yè)第48頁(yè)第49頁(yè)第50頁(yè)第51頁(yè)第52頁(yè)第53頁(yè)第54頁(yè)第55頁(yè)第56頁(yè)第57頁(yè)第58頁(yè)第59頁(yè)第60頁(yè)第61頁(yè)第62頁(yè)第63頁(yè)第64頁(yè)第65頁(yè)第66頁(yè)第67頁(yè)第68頁(yè)第69頁(yè)第70頁(yè)第71頁(yè)第72頁(yè)第73頁(yè)第74頁(yè)第75頁(yè)第76頁(yè)第77頁(yè)第78頁(yè)第79頁(yè)第80頁(yè)第81頁(yè)第82頁(yè)第83頁(yè)第84頁(yè)第85頁(yè)第86頁(yè)第87頁(yè)第88頁(yè)第89頁(yè)第90頁(yè)第91頁(yè)第92頁(yè)第93頁(yè)第94頁(yè)第95頁(yè)第96頁(yè)第97頁(yè)第98頁(yè)第99頁(yè)第100頁(yè)第101頁(yè)第102頁(yè)第103頁(yè)第104頁(yè)第105頁(yè)第106頁(yè)第107頁(yè)第108頁(yè)第109頁(yè)第110頁(yè)第111頁(yè)第112頁(yè)第113頁(yè)第114頁(yè)第115頁(yè)第116頁(yè)第117頁(yè)第118頁(yè)第119頁(yè)第120頁(yè)第121頁(yè)第122頁(yè)
Si3210/Si3211/Si3212
Preliminary Rev. 1.11
41
Receive Path
In the receive path, the optionally compressed 8-bit data
is first expanded to 16-bit words. The PCMF register bit
can bypass the expansion process, in which case two
8-bit words are assembled into one 16-bit word. DACG
is the receive path programmable gain amplifier which
can be programmed from –
∞
dB to 6 dB. An 8 kHz, 16-
bit signal is then provided to a D/A converter. The
resulting analog signal is amplified by the analog
receive amplifier, ARX, which is user selectable to one
of mute/–3.5/0/3.5 dB options. It is then applied at the
input of the transconductance amplifier (Gm) which
drives the off-chip current buffer (I
BUF
).
Audio Characteristics
The dominant source of distortion and noise in both the
transmit and receive paths is the quantization noise
introduced by the
μ
-law or the A-law compression
process. Figure 1 on page 7 specifies the minimum
signal-to-noise-and-distortion ratio for either path for a
sine wave input of 200 Hz to 3400 Hz.
Both the
μ
-law and the A-law speech encoding allow the
audio codec to transfer and process audio signals larger
than 0 dBm0 without clipping. The maximum PCM code
is generated for a
μ
-law encoded sine wave of
3.17 dBm0 or an A-law encoded sine wave of
3.14 dBm0. The ProSLIC overload clipping limits are
driven by the PCM encoding process. Figure 2 on page
7 shows the acceptable limits for the analog-to-analog
fundamental power transfer-function, which bounds the
behavior of ProSLIC.
The transmit path gain distortion versus frequency is
shown in Figure 3 on page 8. The same figure also
presents the minimum required attenuation for any out-
of-band analog signal that may be applied on the line.
Note the presence of a high-pass filter transfer-function,
which ensures at least 30 dB of attenuation for signals
below 65 Hz. The low-pass filter transfer function which
attenuates signals above 3.4 kHz has to exceed the
requirements specified by the equations in Figure 3 on
page 8 and it is implemented as part of the A-to-D
converter.
The receive path transfer function requirement, shown
in Figure 4 on page 9, is very similar to the transmit path
transfer function. The most notable difference is the
absence of the high-pass filter portion. The only other
differences are the maximum 2 dB attenuation at
200 Hz (as opposed to 3 dB for the transmit path) and
the 28 dB of attenuation for any frequency above
4.6 kHz. The PCM data rate is 8 kHz and thus, no
frequencies greater than 4 kHz can be digitally encoded
in the data stream. From this point of view, at
frequencies greater than 4 kHz, the plot in Figure 4
should be interpreted as the maximum allowable
magnitude of any spurious signals that are generated
when a PCM data stream representing a sine wave
signal in the range of 300 Hz to 3.4 kHz at a level of
0 dBm0 is applied at the digital input.
The group delay distortion in either path is limited to no
more than the levels indicated in Figure 5 on page 10.
The reference in Figure 5 is the smallest group delay for
a sine wave in the range of 500 Hz to 2500 Hz at
0 dBm0.
The block diagram for the voice-band signal processing
paths are shown in Figure 23. Both the receive and the
transmit paths employ the optimal combination of
analog and digital signal processing to provide the
maximum performance while, at the same time, offering
sufficient flexibility to allow users to optimize for their
particular application of the ProSLIC. All programmable
signal-processing blocks are symbolically indicated in
Figure 23 by a dashed arrow across them. The two-wire
(TIP/RING) voice-band interface to the ProSLIC is
implemented using a small number of external
components. The receive path interface consists of a
unity-gain current buffer, I
BUF
, while the transmit path
interface is simply an ac coupling capacitor. Signal
paths, although implemented differentially, are shown
as single-ended for simplicity.
Transhybrid Balance
The ProSLIC provides programmable transhybrid
balance with gain block H. (See Figure 23.) In the ideal
case where the synthesized SLIC impedance matches
exactly the subscriber loop impedance, the transhybrid
balance should be set to subtract a –6 dB level from the
transmit path signal. The transhybrid balance gain can
be adjusted from –2.77 dB to +4.08 dB around the ideal
setting of –6 dB by programming the HYBA[2:0] bits of
the Hybrid Control register (direct Register 11). Note
that adjusting any of the analog or digital gain blocks will
not require any modification of the transhybrid balance
gain block, as the transhybrid gain is subtracted from
the transmit path signal prior to any gain adjustment
stages. The transhybrid balance can also be disabled, if
desired, using the appropriate register setting.
Loopback Testing
Four loopback test options are available in the ProSLIC:
The full analog loopback (ALM2) tests almost all the
circuitry of both the transmit and receive paths. The
compressed 8-bit word transmit data stream is fed
back serially to input of the receive path expander.
(See Figure 23.) The signal path starts with the
analog signal at the input of the transmit path and
ends with an analog signal at the output of the
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SI3212-KT | PROSLIC PROGRAMMABLE CMOS SLIC/CODEC WITH RINGING/BATTERY VOLTAGE GENERATION |
| SI3311-H | SI3311-H |
| SI3317-H | IRED |
| SI3317-H(B) | IRED |
| Si4112G-BT* | Hook-Up Wire; Conductor Size AWG:22; No. Strands x Strand Size:7 x 30; Jacket Color:Black; Approval Bodies:UL, CSA; Approval Categories:UL AWM Style 1015, CSA Type TEW, JQA-F-, Passes VW-1 Flame Test; Conductor Material:Copper RoHS Compliant: Yes |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SI3212-KT | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:PROSLIC PROGRAMMABLE CMOS SLIC/CODEC WITH RINGING/BATTERY VOLTAGE GENERATION |
| SI3215 | 制造商:SILABS 制造商全稱:SILABS 功能描述:PROSLIC㈢ PROGRAMMABLE CMOS SLIC/CODEC WITH RINGING/BATTERY VOLTAGE GENERATION |
| SI3215-B-FM | 功能描述:電信線路管理 IC SINGLE CHANNEL SLIC 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 |
| SI3215-B-FMR | 制造商:Silicon Laboratories Inc 功能描述: |
| SI3215-B-GM | 功能描述:IC SLIC/CODEC 1CH 38QFN RoHS:是 類別:集成電路 (IC) >> 接口 - 電信 系列:ProSLIC® 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS 產(chǎn)品變化通告:Product Discontinuation 06/Feb/2012 標(biāo)準(zhǔn)包裝:750 系列:* |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。