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| 型號： | CLC014AJE-TR13/NOPB |
| 廠商： | National Semiconductor |
| 文件頁數(shù)： | 10/21頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC CABLE EQUALIZER ADAPT 14-SOIC |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 應(yīng)用： | 醫(yī)用型 |
| 電源電壓： | 4.5 V ~ 5.5 V |
| 封裝/外殼： | 14-SOIC（0.154"，3.90mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 14-SOICN |
| 包裝： | 帶卷 (TR) |
| 安裝類型： | 表面貼裝 |
| 配用： | SD901EVK-ND - BOARD EVAL CLC014, 016, 011, 006 SD014EVK-ND - BOARD EVALUATION CLC014 |
| 其它名稱： | *CLC014AJE-TR13 *CLC014AJE-TR13/NOPB CLC014AJE-TR13 |
OBSOLETE
SNLS010E – JUNE 1998 – REVISED APRIL 2013
TWISTED PAIR DRIVER
A low-cost medium for transmitting data is twisted pair. Category 5 UTP has an attenuation characteristic similar
to Belden 8281 coaxial cable but scaled in length: 120 meters of Category 5 UTP is roughly equivalent to 300
meters of Belden 8281 cable. When properly implemented, the CLC014 will equalize data rates up to 625 Mbps
over Category 5 UTP. The maximum data rate depends upon the cable length. A plot of Maximum Data Rate vs
Cable Length is found in TYPICAL PERFORMANCE CHARACTERISTICS for Belden 8281, and can be scaled
as stated above to estimate maximum cable lengths and data rates for UTP.
Category 5 UTP has a characteristic impedance of approximately 100
. The CLC006 in Figure 29 is used to
drive the twisted pair AC-coupled with a series 0.1
μF capacitor and a 50 resistor in each differential output.
The CLC014 Adaptive Equalizer requires 800 mVpp from the transmit side of the cable. A voltage divider is
necessary to scale the voltage to the required level at the input of the CLC014. This resistor network also
provides the correct impedance match for twisted pair.
For Category 5 UTP, the approximate AEC voltage per length is 3.75 mV/m (see BLOCK DESCRIPTION). The
CLC006 provides a trim adjust for fine tuning the output signal with the resistor R. Refer to the CLC006/007
datasheet for tuning directions.
Figure 29. Twisted Pair Equalization
Figure 30. Before and After Equalization at 622 Mbps Through 50 Meters of Category 5 UTP
18
Copyright 1998–2013, Texas Instruments Incorporated
Product Folder Links: CLC014
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