AD8120 Datasheet – Triple Skew-Compensating Video Delay

Part Number: AD8120

Function: Triple Skew-Compensating Video Delay Line with Analog and Digital Control

Package: 32-lead, 5 mm × 5 mm LFCSP

Manufacturer: Analog Devices


AD8120 datasheet



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.

The AD8120 contains three delay paths that provide broadband delays up to 50 ns, in 0.8 ns increments, using 64 digital control steps or analog control adjustment. The delay technique used in the AD8120 minimizes noise and offset at the outputs. The bandwidth of the AD8120 ranges from 150 MHz to 200 MHz, depending on the delay setting. This wide bandwidth makes the AD8120 ideal for use in applications that receive high resolution video over UTP cables.


– Corrects for unshielded twisted pair (UTP) cable skew
– Delay of up to 50 ns per channel
– High speed
(1) 200 MHz BW @ VOUT = 1.4 V p-p and 0 ns delay
(2) 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
– Independent red, green, and blue delay controls
– Drives 4 double-terminated video loads
– Digital and analog delay control
– 6-bit SPI busI2C bus
– Analog voltage control
– High differential input impedance: 500 kΩ


– Keyboard-video-mouse (KVM)
– Digital signage
– RGB video over UTP cable
– Professional video projection and distribution
– HD video
– Security video
– General broadband delay lines

Other data sheets are available within the file:


AD8120 Datasheet PDF Download

AD8120 pdf