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參數(shù)資料
| 型號(hào)： | AFE1203 |
| 元件分類(lèi)： | 圓形連接器 |
| 英文描述： | Circular Connector; No. of Contacts:15; Series:MS27467; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:15; Circular Contact Gender:Socket; Circular Shell Style:Straight Plug; Insert Arrangement:15-15 RoHS Compliant: No |
| 中文描述： | 2Mbps的，單對(duì)HDSL模擬前端 |
| 文件頁(yè)數(shù)： | 10/10頁(yè) |
| 文件大小： | 193K |
| 代理商： | AFE1203 |
10
AFE1203
LAYOUT
The analog front end of an HDSL system has a number of
conflicting requirements. It must accept and deliver digital
outputs at fairly high rates of speed, phase-lock to a high-
speed digital clock, and convert the line input to a high-
precision (14-bit) digital output. Thus, there are really three
sections of the AFE1203: the digital section, the phase-
locked loop, and the analog section. A combined analog and
digital ground plane is recommended. The ground plane
should pass under all of the AFE1203 and its pins.
The power supply for the digital section of the AFE1203 can
range from 3.3V to 5V. This supply should be decoupled to
ground with a ceramic 0.1
μ
F capacitor placed as close to
DGND (pin 12) and DV
DD
(pin 13) as possible. Ideally, both
a digital power supply plane and a ground plane should run
up to and underneath the digital pins of the AFE1203 (pins
3 through 26). However, DV
DD
may be supplied by a wide
printed circuit board (PCB) trace. A ground plane under-
neath all digital pins is strongly recommended.
The Phase Locked Loop (PLL) analog supply, pin 2, must be
derived from AV
DD
, the general analog supply. The power
supply to the PLL must be in the range of 4.75V to 5.25V.
The PLL section of the AFE1203 should be decoupled with
both a 10
μ
F tantalum capacitor and a 0.1
μ
F ceramic capaci-
tor. Both capacitors should be placed between pins 1 and 2.
The ceramic capacitor should be placed as close to the
AFE1203 as possible. The placement of the tantalum capaci-
tor is not as critical, but should be close. A 5
to 10
resistor should be used to connect the PLL supply (pin 2) to
the analog supply. This resistor, in combination with the
10
μ
F tantalum capacitor, form a low pass filter to keep
glitches that occur on the general analog supply, AV
DD
,
from affecting the PLL supply. The PLL ground (pin 1)
should connect directly to the ground plane. The ground
plane should also extend underneath PLL
OUT
and PLL
IN
(pins 47 and 48, respectively).
The remaining portion of the AFE1203 should be considered
analog. All AGND pins should be connected directly to the
common ground plane and all AV
DD
pins should be con-
nected to an analog 5V power plane. Both of these planes
should have a low impedance path to the power supply.
Ideally, all ground planes and traces and all power planes
and traces should return to the power supply connector
before being connected together (if necessary). Each ground
and power trace pair should be routed over each other,
should not overlap any portion of another pair, and the pairs
should be separated by a distance of at least 0.25 inch
(6mm).
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AFE1203E | LJT 18C 18#20 PIN PLUG |
| AFE1205 | LJT 18C 18#20 PIN PLUG |
| AFE1205E | Circular Connector; No. of Contacts:18; Series:MS27467; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:15; Circular Contact Gender:Pin; Circular Shell Style:Straight Plug; Insert Arrangement:15-18 RoHS Compliant: No |
| AFE1224 | 2Mbps, Single Pair ANALOG FRONT END |
| AFE1224E | Circular Connector; No. of Contacts:18; Series:MS27467; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:15; Circular Contact Gender:Socket; Circular Shell Style:Straight Plug; Insert Arrangement:15-18 RoHS Compliant: No |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AFE1203E | 制造商:Texas Instruments 功能描述: |
| AFE1203E/1K | 功能描述:電信線路管理 IC 2Mbps Sngl Pair HDSL Anlg Front End RoHS:否 制造商:STMicroelectronics 產(chǎn)品:PHY 接口類(lèi)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 |
| AFE1203E/1KG4 | 功能描述:電信線路管理 IC 2Mbps Sngl Pair HDSL Anlg Front End RoHS:否 制造商:STMicroelectronics 產(chǎn)品:PHY 接口類(lèi)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 |
| AFE1205 | 制造商:BB 制造商全稱(chēng):BB 功能描述:2Mbps, Single Pair HDSL ANALOG FRONT END |
| AFE1205E | 功能描述:電信線路管理 IC 2Mbps Sngl Pair HDSL Anlg Front End RoHS:否 制造商:STMicroelectronics 產(chǎn)品:PHY 接口類(lèi)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 |
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