GENERAL DESCRIPTION

The AD8120 is a triple broadband skew-compensating delay line that corrects for time mismatch between video signals incurred by transmission in unshielded twisted pairs of Category 5 and Category 6 type cables. Skew between the individual pairs exists in most types of multipair UTP cables due to the different twist rates that are used for each pair to minimize crosstalk between pairs. For this reason, some pairs are longer than others, and in long cables, the difference in propagation time between two pairs can be well into the tens of nanoseconds.

FEATURES

Corrects for unshielded twisted pair (UTP) cable skew

Delay of up to 50 ns per channel

High speed

200 MHz BW @ VOUT = 1.4 V p-p and 0 ns delay

150 MHz BW @ VOUT = 1.4 V p-p and 50 ns delay

Excellent channel-to-channel matching

30 mV offset matching RTI

0.8 gain matching

Low output offset

±30 mV RTI

No external circuitry required to correct for offsets

Independent red, green, and blue delay controls

Drives 4 double-terminated video loads

Digital and analog delay control

6-bit SPI bus

I2C bus

Analog voltage control

Fixed gain of 2

Low noise

High differential input impedance: 500 kΩ

32-lead, 5 mm × 5 mm LFCSP

APPLICATIONS

Keyboard-video-mouse (KVM)

Digital signage

RGB video over UTP cable

Professional video projection and distribution

HD video

Security video

General broadband delay lines