The AD8128 is a CAT-5 receiver with adjustable line equalization. It is designed to compensate for the losses in CAT-5 cables and features voltage-controlled frequency response adjustment, high frequency peaking adjustment, and broadband gain adjustment. The product is suitable for applications such as keyboard-video-mouse (KVM), RGB video over unshielded twisted pair (UTP) cable receivers, professional video projection and distribution, and security video.
The AD8128 is a high‑speed, differential receiver/equalizer designed to compensate for the transmission losses of unshielded twisted‑pair (UTP) CAT‑5 cables. It provides up to 120 MHz equalized bandwidth over 100 m of cable and features three control pins for adjusting high‑frequency peaking, broadband gain, and DC offset.
The device is offered in a small 8‑lead 3 mm × 3 mm LFCSP, operates from a +5 V supply with a quiescent current of 24 mA, and is rated for –40 °C to +85 °C. It can be cascaded to equalize up to 200 m of cable, and evaluation boards are available for both general‑purpose and KVM applications.
| Rise/Fall Time (100 m CAT‑5) | 3.6 ns |
|---|---|
| Integrated Output Voltage Noise | 1.5 mV rms |
| Supply Current | 24 mA |
| Operating Voltage Range | +4.5 V to +5.5 V |
| Temperature Range | -40 °C to +85 °C |
| Package | 8‑lead 3 mm × 3 mm LFCSP |
It can equalize up to 100 meters of CAT‑5 cable while maintaining a 120 MHz bandwidth.
Two AD8128 devices can be cascaded to provide equalization for up to 200 meters of CAT‑5 cable.
The AD8128 has three control pins that adjust high‑frequency peaking, broadband gain, and DC offset.
It is available in an 8‑lead 3 mm × 3 mm lead‑frame chip‑scale package (LFCSP).