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參數(shù)資料
| 型號： | AFE1115 |
| 元件分類： | 圓形連接器 |
| 英文描述： | Circular Connector; No. of Contacts:12; Series:MS27467; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:15; Circular Contact Gender:Socket; Circular Shell Style:Straight Plug; Insert Arrangement:15-97 RoHS Compliant: No |
| 中文描述： | HDSL / MDSL模擬前端與石英振蕩器 |
| 文件頁數(shù)： | 10/12頁 |
| 文件大?。?/td> | 219K |
| 代理商： | AFE1115 |
10
AFE1115
rxHYB
N
AFE1115
rxLINE
P
rxLINE
N
rxD13 - rxD0
rxHYB
P
txLINE
N
txLINE
P
txDAT
P
100pF
1.5k
3k
11.6
11.6
5.6
1:2
5.6
1.5
100pF
750
Transmit
Data
Uncancelled
Echo
750
135
S
1
A
F
RECEIVE TIMING
The rxSYNC signal controls portions of the A/D converter’s
decimation filter and the data output timing of the A/D
converter. It is generated at the symbol rate by the user and
must be synchronized with txCLK. The leading edge of
rxSYNC can occur at the leading edge of txCLK or it can be
shifted by the user in increments of 1/48 of a symbol period
to one of 47 discrete delay times after the leading edge of
txCLK.
The bandwidth of the A/D converter decimation filter is
equal to one half of the symbol rate. The A/D converter data
output rate is 2X the symbol rate. The specifications of the
AFE1115 assume that one A/D converter output is used per
symbol period and the other output is ignored. The Receive
Timing Diagram above suggests using the rxSYNC pulse to
read the first data output in a symbol period. Either data
output may be used. Both data outputs may be used for more
flexible post-processing.
DISCUSSION OF
SPECIFICATIONS
UNCANCELLED ECHO
The key measure of transceiver performance is uncancelled
echo. This measurement is made as shown in the diagram of
Figure 6 and the measurement is made as follows. The AFE
is connected to an output circuit including a typical 1:2.3
line transformer. The line is simulated by a 135
resistor.
Symbol sequences are generated by the tester and applied
both to the AFE and to the input of an adaptive filter. The
output of the adaptive filter is subtracted from the AFE
output to form the uncancelled echo signal. Once the filter
taps have converged, the RMS value of the uncancelled echo
is calculated. Since there is no far-end signal source or
additive line noise, the uncancelled echo contains only noise
and linearity errors generated in the transmitter and receiver.
The data sheet value for uncancelled echo is the ratio of the
RMS uncancelled echo (referred to the receiver input through
the receiver gain) to the nominal transmitted signal (13.5dBm
into 135
, or 1.74Vrms). This echo value is measured under
a variety of conditions: with loopback enabled (line input
disabled); with loopback disabled under all receiver gain
ranges; and with the line shorted (S
1
closed in Figure 6).
POWER DISSIPATION
Approximately 75% of the power dissipation in the AFE1115
is in the analog circuitry, and this component does not
change with clock frequency. However, the power dissipa-
tion in the digital circuitry does decrease with lower clock
frequency. In addition, the power dissipation in the digital
section is decreased with operation from a smaller supply
voltage, such as 3.3V. (The analog supply, must remain in
the range 4.75V to 5.25V.)
The power dissipation listed in the specifications section
applies under these normal operating conditions: 5V Analog
Power Supply; 3.3V Digital Power Supply; E1 baud rate;
FIGURE 6. Uncancelled Echo Test Diagram.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AFE1115E | Circular Connector; No. of Contacts:12; Series:MS27467; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:15; Circular Contact Gender:Socket; Circular Shell Style:Straight Plug; Insert Arrangement:15-97 RoHS Compliant: No |
| AFE1124 | LJT 12C 8#20 4#16 SKT WALL REC |
| AFE1124E | Circular Connector; No. of Contacts:15; Series:MS27467; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:15; Circular Contact Gender:Pin; Circular Shell Style:Straight Plug; Insert Arrangement:15-15 RoHS Compliant: No |
| AFE1144 | Circular Connector; No. of Contacts:15; Series:MS27467; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:15; Circular Contact Gender:Pin; Circular Shell Style:Straight Plug; Insert Arrangement:15-15 RoHS Compliant: No |
| AFE1144E | 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 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AFE1115E | 功能描述:IC ANALOG FRONT END 56-SSOP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模擬前端 (AFE) 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- 位數(shù):- 通道數(shù):2 功率（瓦特）:- 電壓 - 電源，模擬:3 V ~ 3.6 V 電壓 - 電源，數(shù)字:3 V ~ 3.6 V 封裝/外殼:32-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:32-QFN（5x5） 包裝:帶卷 (TR) |
| AFE1115E/1K | 功能描述:IC ANALOG FRONT END 56-SSOP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模擬前端 (AFE) 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- 位數(shù):- 通道數(shù):2 功率（瓦特）:- 電壓 - 電源，模擬:3 V ~ 3.6 V 電壓 - 電源，數(shù)字:3 V ~ 3.6 V 封裝/外殼:32-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:32-QFN（5x5） 包裝:帶卷 (TR) |
| AFE1115E-1 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| AFE1115E-1/1K | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| AFE1124 | 制造商:BB 制造商全稱:BB 功能描述:HDSL/MDSL ANALOG FRONT END |
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