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| 型号： | AD8128ACPZ-RL |
| 厂商： | Analog Devices Inc |
| 文件页数： | 1/12页 |
| 文件大小： | 0K |
| 描述： | IC RECEIVER LINE EQUAL 8LFCSP |
| 标准包装： | 5,000 |
| 类型： | 接收器 |
| 驱动器/接收器数： | 0/1 |
| 规程： | 以太网 |
| 电源电压： | 4.5 V ~ 5.5 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-VFDFN 裸露焊盘，CSP |
| 供应商设备封装： | 8-LFCSP-VD（3x3） |
| 包装： | 带卷 (TR) |
CAT-5 Receiver with
Adjustable Line Equalization
AD8128
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringements of patents or other
rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
2005 Analog Devices, Inc. All rights reserved.
FEATURES
Tuned to compensate for Category-5 (CAT-5) cable losses
Up to 100 meters @ 120 MHz
2 voltage-controlled frequency response adjustment pins
High frequency peaking adjustment
Broadband gain adjustment
2700 V/μs slew rate
Low output noise
1.5 mV rms integrated noise (1 GHz) @ 100 meters
equalized bandwidth
DC output offset adjust
Low offset voltage error: 7 mV typ
Equalized pass-band ripple ±1 dB to 70 MHz
Input: differential or single ended
Supply current: 24 mA on ±5 V
Small 8-lead 3 mm × 3 mm LFCSP
APPLICATIONS
Keyboard-video-mouse (KVM)
RGB video over unshielded twisted pair (UTP) cable receivers
Professional video projection and distribution
Security video
FUNCTIONAL BLOCK DIAGRAM
VOFFSET
VGAIN
VPEAK
VOUT
VIN+
VIN–
AD8128
05
699
-00
1
HPF
LPF
Figure 1.
GENERAL DESCRIPTION
The AD8128 is a high speed, differential receiver/equalizer that
compensates for the transmission losses of unshielded twisted
pair (UTP) CAT-5 cables. Various frequency dependent gain
stages are summed together to best approximate the inverse
frequency response of CAT-5/CAT-5e cable. An equalized
bandwidth of 120 MHz can be achieved for 100 meters of cable.
The AD8128 can be used as a standalone receiver/equalizer or
in conjunction with the AD8143, triple differential receiver, to
provide a complete low cost solution for receiving RGB over
UTP cable in such applications as KVM.
The AD8128 has three control pins for optimal CAT-5/CAT-5e
compensation. The equalized cable length is directly proportional
to the voltage applied to the VPEAK pin, which controls the
amount of high frequency peaking. VGAIN adjusts the broadband
gain from 0 dB to 3 dB, compensating for the resistive cable
loss. VOFFSET allows the output to be shifted by ±2.5 V, adding
flexibility for dc-coupled systems.
Low integrated output noise and offset voltage adjust make the
AD8128 an excellent choice for dc-coupled wideband RGB-
over-CAT-5 applications. For systems where the UTP cable is
longer than 100 meters, two AD8128s can be cascaded to
compensate for up to 200 meters of CAT-5/CAT-5e.
The AD8128 is available in a 3 mm × 3 mm 8-lead LFCSP and
is rated to operate over the extended temperature range of
40°C to +85°C.
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