Low Cost, 225 MHz ,16 x 16 Crosspoint Switch, G=+2
The AD8114/AD8115 are high speed, 16 × 16 video crosspoint switch matrices. They offer a −3 dB signal bandwidth greater than 200 MHz and channel switch times of less than 50 ns with 1% settling. With −70 dB of crosstalk and −98 dB isolation (at 5 MHz), the AD8114/AD8115 are useful in many high speed applications.
The differential gain and differential phase of better than 0.05% and 0.05°, respectively, along with a 0.1 dB flatness out to 25 MHz while driving a 75 Ω back-terminated load, make the AD8114/ AD8115 ideal for all types of signal switching.
The AD8114/AD8115 include 16 independent output buffers that can be placed into a high impedance state for paralleling crosspoint outputs so that off channels do not load the output bus. The AD8114 has a gain of 1, while the AD8115 offers a gain of 2. They operate on voltage supplies of ±5 V while consuming only 70 mA of idle current. The channel switching is performed via a serial digital control (which can accommodate daisy-chaining of several devices) or via a parallel control, allowing updating of an individual output without reprogramming the entire array.
The AD8114/AD8115 is packaged in a 100-lead LQFP and is available over the extended industrial temperature range of −40°C to +85°C.
- Routing of high speed signals, including
– Video (NTSC, PAL, S, SECAM, YUV, RGB)
– Compressed video (MPEG, wavelet)
– 3-level digital video (HDB3)
– Data communications
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
The AD8115 is a high speed 16 × 16 video crosspoint switch matrices. It offers a −3 dB signal bandwidth greater than 200 MHz and channel switch times of less than 50 ns with 1% settling. The AD8115 includes 16 independent output buffers that can be placed into a high impedance state for paralleling crosspoint outputs to prevent off channels from loading the output bus. The AD8115 has a gain of +2. They both operate on voltage supplies of ±5 V while consuming only 70 mA of idle current. Channel switching is performed via a serial digital control that can accommodate the daisy-chaining of several devices or via a parallel control to allow updating of an individual output without reprogramming the entire array.
The AD8115 is available in a 100-lead LQFP over the extended industrial temperature range of −40°C to +85°C. Some applications of these analog crosspoint switches are routing of high speed signals including video (NTSC, PAL, S-video, SECAM, YUV, RGB), compressed video, three-level digital video, data communications, and telecommunications.
The AD8112, AD8113, AD8114/AD8115, and ADV3205 are all pin-compatible with each other and are available in the same 100-lead LQFP, which can be evaluated on a single board.
Product Selection Guide
High Speed Switches
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by James Caffrey (Fiberoptic Product News, 8/2003)
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