- 您现在的位置：买卖IC网 > PDF目录10988 > SI3216M-B-GM (Silicon Laboratories Inc)IC SLIC/CODEC 1CH 38QFN PDF资料下载
参数资料
| 型号： | SI3216M-B-GM |
| 厂商： | Silicon Laboratories Inc |
| 文件页数： | 63/122页 |
| 文件大小： | 0K |
| 描述： | IC SLIC/CODEC 1CH 38QFN |
| 标准包装： | 43 |
| 系列： | ProSLIC® |
| 功能： | 用户线路接口概念（SLIC），CODEC |
| 接口： | GCI，PCM，SPI |
| 电路数： | 1 |
| 电源电压： | 3.13 V ~ 5.25 V |
| 电流 - 电源： | 88mA |
| 功率（瓦特）： | 700mW |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 38-VFQFN 裸露焊盘 |
| 供应商设备封装： | 38-QFN（5x7） |
| 包装： | 管件 |
| 包括： | 音频音调生成，BORSCHT 功能，FSK 生成，振铃和电池电压生成 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页第61页第62页当前第63页第64页第65页第66页第67页第68页第69页第70页第71页第72页第73页第74页第75页第76页第77页第78页第79页第80页第81页第82页第83页第84页第85页第86页第87页第88页第89页第90页第91页第92页第93页第94页第95页第96页第97页第98页第99页第100页第101页第102页第103页第104页第105页第106页第107页第108页第109页第110页第111页第112页第113页第114页第115页第116页第117页第118页第119页第120页第121页第122页
Si3216
Rev. 1.0
45
Not
Recommended
fo
r N
ew
D
esi
gn
s
2.5.2. Receive Path
In the receive path, digital voice is expanded from /A-
law if enabled. DACG is the receive path programmable
gain amplifier which can be programmed from –
dB to
6 dB. A 16-bit signal is then provided to a D/A converter.
The resulting analog signal is amplified by the analog
receive amplifier, ARX, which has the following gain
options: mute, –3.5, 0, and 3.5 dB. It is then applied at
the input of the transconductance amplifier (Gm), which
drives the off-chip current buffer (IBUF).
2.5.3. Companding
The ProSLIC supports both -255 law and A-law
companding
formats
when
narrowband
mode
is
selected. -255 law is more commonly used in North
America and Japan, while A-law is used primarily in
Europe. Data format is selected using the PCMF
formats, respectively.
The dominant source of distortion and noise in both the
transmit and receive paths is the quantization noise
introduced by the -law or the A-law compression
process. Figure 3 on page 11 specifies the minimum
signal-to-noise and distortion ratio for either path for a
sine wave input of 200 Hz to 3400 Hz.
Both -law and 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 -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 4 on page 11 shows the
acceptable limits for the analog-to-analog fundamental
power transfer function, which bounds the behavior of
ProSLIC.
2.5.4. Transhybrid Balance
The
ProSLIC
provides
programmable
transhybrid
balance with gain block H. (See Figure 24.) In the ideal
case where the synthesized SLIC impedance exactly
matches
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). Adjusting any of the analog
or digital gain blocks does 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.
2.5.5. 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
transmit data stream is fed back serially to the input
of the receive path expander. (See Figure 24.) 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 receive path.
An additional analog loopback (ALM1) takes the
digital stream at the output of the A/D converter and
feeds it back to the D/A converter. (See Figure 24.)
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 receive path. This
loopback option allows testing of the analog signal
processing circuitry of the ProSLIC completely
independently of any activity in the DSP.
The full digital loopback tests almost all the circuitry
of both the transmit and receive paths. The analog
signal at the output of the receive path is fed back to
the input of the transmit path by way of the hybrid
filter path. (See Figure 24.) The signal path starts
with PCM data input to the receive path and ends
with PCM data at the output of the transmit path.
An additional digital loopback (DLM) takes the digital
stream at the input of the D/A converter in the
receive path and feeds it back to the transmit A/D
digital filter. The signal path starts with PCM data
input to the receive path and ends with PCM data at
the output of the transmit path. This loopback option
allows testing of the ProSLIC digital signal
processing circuitry completely independently of any
analog signal processing activity.
2.6. Two-Wire Impedance Matching
The ProSLIC provides on-chip programmable two-wire
impedance settings to meet a wide variety of worldwide
two-wire
return
loss
requirements.
The
two-wire
impedance is programmed by loading one of the eight
available impedance values into the TISS[2:0] bits of the
Two-Wire Impedance Synthesis Control register (direct
Register 10). If direct Register 10 is not user-defined,
the default setting of 600
will be loaded into the TISS
register.
Real and complex two-wire impedances are realized by
internal feedback of a programmable amplifier (RAC), a
switched
capacitor
network
(XAC),
and
a
creates the real portion, and XAC creates the imaginary
portion of the ac impedance. Gm then creates a current
that models the desired impedance value to the
subscriber loop. The differential ac current is fed to the
相关PDF资料 |
PDF描述 |
|---|---|
| SI3216M-B-FM | IC SLIC/CODEC 1CH 38QFN |
| VI-B0N-IY-F2 | CONVERTER MOD DC/DC 18.5V 50W |
| VI-B0N-IY-F1 | CONVERTER MOD DC/DC 18.5V 50W |
| VI-B0L-IY-F4 | CONVERTER MOD DC/DC 28V 50W |
| VI-B0L-IY-F2 | CONVERTER MOD DC/DC 28V 50W |
相关代理商/技术参数 |
参数描述 |
|---|---|
| SI3216M-BT | 功能描述:IC SLIC/CODEC 1CH 38TSSOP RoHS:否 类别:集成电路 (IC) >> 接口 - 电信 系列:ProSLIC® 产品培训模块:Lead (SnPb) Finish for COTS 产品变化通告:Product Discontinuation 06/Feb/2012 标准包装:750 系列:* |
| SI3216M-C-FM | 功能描述:电信线路管理 IC Single-Channel Wide- band SLIC/Codec RoHS:否 制造商:STMicroelectronics 产品:PHY 接口类型:UART 电源电压-最大:18 V 电源电压-最小:8 V 电源电流:30 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:VFQFPN-48 封装:Tray |
| SI3216M-C-FMR | 功能描述:电信线路管理 IC SnglCH WB SLIC/Codec Transformer dc-dc RoHS:否 制造商:STMicroelectronics 产品:PHY 接口类型:UART 电源电压-最大:18 V 电源电压-最小:8 V 电源电流:30 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:VFQFPN-48 封装:Tray |
| SI3216M-C-GM | 功能描述:电信线路管理 IC Single-Channel Wide- band SLIC/Codec RoHS:否 制造商:STMicroelectronics 产品:PHY 接口类型:UART 电源电压-最大:18 V 电源电压-最小:8 V 电源电流:30 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:VFQFPN-48 封装:Tray |
| SI3216M-C-GMR | 功能描述:电信线路管理 IC SnglCH WB SLIC/Codec Transformer dc-dc RoHS:否 制造商:STMicroelectronics 产品:PHY 接口类型:UART 电源电压-最大:18 V 电源电压-最小:8 V 电源电流:30 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:VFQFPN-48 封装:Tray |
发布紧急采购，3分钟左右您将得到回复。