The AD8147/AD8148 are high speed triple, differential or single-ended input to differential output drivers. The AD8147 has a fixed gain of 2, and the AD8148 has a fixed gain of 4.The AD8147 and AD8148 devices are designed for the highest resolution component video signals but can be used for any type of analog signals or high speed data transmission over either a Category 5 UTP (Cat-5) cable or differential printed circuit board (PCB) transmission lines. These drivers can be used with the AD8145 triple, differential to single-ended receiver, and the AD8117 crosspoint switch, to produce a video distribution system capable of supporting UXGA or 1080p signals.
Manufactured on the Analog Devices, Inc., second generation XFCB bipolar process, the drivers have large signal bandwidths of 700 MHz and fast slew rates. They have an internal common-mode feedback feature that provides output amplitude and phase matching that is balanced to −60 dB at 50 MHz, suppressing even order harmonics and minimizing radiated electromagnetic interference (EMI).
Both the AD8147 and AD8148 encode vertical and horizontal sync signals on the common-mode voltages of the outputs. All outputs can be independently set to low voltage states to be used with series diodes for line isolation, allowing easy, differential multiplexing over the same twisted pair cable.
The AD8147/AD8148 are available in a 24-lead LFCSP and operate over a temperature range of −40°C to +85°C.
The user guide UG-861 provides all supporting documents for evaluating the AD8147/AD8148. Consult the AD8147 and AD8148 data sheets, which provide additional information, when working with the evaluation board.
