AD8128ACPZ-RL
数据手册.pdfCAT - 5接收机具有可调线路均衡 CAT-5 Receiver with Adjustable Line Equalization
Product Details
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-overCAT-5 applications. For systems where the UTP cable is longer than 100 meters, two AD8128 devices 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.
Applications
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- Keyboard-video-mouse KVM
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- RGB video over unshielded twisted pair UTP cable receivers
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- Professional video projection and distribution
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- Security video
### Features and Benefits
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- Tuned to compensate for Category-5 CAT-5 cable losses
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- Up to 100 meters at 120 MHz
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- 2 voltage controlled frequency response adjustment pins
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- High frequency peaking adjustment
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- Broadband gain adjustment
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- 2700 V/μs slew rate
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- Low output noise
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- 1.5 mV rms integrated noise 1 GHz at 100 meters equalized bandwidth
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- DC output offset adjust
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- Low offset voltage error: 7 mV typ
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- Equalized pass-band ripple ±1 dB to 70 MHz
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- Input: differential or single ended
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- Supply current: 24 mA on ±5 V
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- Small 8-lead 3 mm × 3 mm LFCSP