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
Features and Benefits
| AmplifiersAudio & Video Products |
| Document | note |
| AD8128: CAT-5 Receiver with Adjustable Line Equalization Data Sheet (Rev. A) | PDF 373.47 K |
| Part Number | Package | Packing Qty | Temp Range | Price 100-499 | Price 1000+ | RoHS |
|---|---|---|---|---|---|---|
| AD8128ACPZ-R2 Production | 8 ld LFCSP (3x3mm 2.44x1.6EP) | REEL 250 | -40 to 85C | 3.55 | 3.55 | Y |
| AD8128ACPZ-R7 Production | 8 ld LFCSP (3x3mm 2.44x1.6EP) | REEL 1500 | -40 to 85C | 0 | 2.62 | Y |
| AD8128ACPZ-RL Production | 8 ld LFCSP (3x3mm 2.44x1.6EP) | REEL 5000 | -40 to 85C | 0 | 0 | Y |
