AD8109AST

The AD8109AST is a high-speed 8x8 buffered video crosspoint switch from Analog Devices. It is part of the AD8108/AD8109 family, with the AD8109 offering a fixed gain of 2 V/V. The device provides a complete solution with buffered inputs and eight output amplifiers capable of driving 150 Ω loads.

Key electrical specifications include a -3 dB bandwidth of 250 MHz, a slew rate of 480 V/µs, and typical supply current of 45 mA. It achieves excellent video performance with 0.02% differential gain error and 0.02° differential phase error. All hostile crosstalk is -83 dB at 5 MHz. The device is ESD rated to 4000 V human body model.

The switch array is nonblocking and can be programmed via serial or parallel interface. A serial data output allows daisy-chaining multiple devices for larger arrays. An output disable feature enables connection of multiple devices. The reset pin can disable all outputs and provides power-on reset capability when connected to ground through a capacitor.

The AD8109AST is housed in an 80-lead LQFP package measuring 12 mm x 12 mm with a 0.5 mm lead pitch. It is surface mount with gull-wing terminations. The device is suitable for routing high-speed signals including composite video (NTSC, PAL, S, SECAM), component video (YUV, RGB), compressed video (MPEG, Wavelet), and 3-level digital video (HDB3).