Equalizer IC receives video over one mile of Category 5 cable

Paul Rako, Technical Editor -- EDN, December 2, 2010

Intersil’s new ISL59605 MegaQ video-equalizer IC requires no active circuitry at the camera end, so you need not retrofit cameras mounted on buildings or poles. The ISL59605 compensates for high-frequency cable loss as high as 60 dB at 5 MHz and source-amplitude variations as high as ±3 dB. The device is compatible with both color and monochrome specifications of the NTSC (National Television System Committee) and PAL (phase-alternating-line) standards. It operates from a 5V supply; consumes only 500 mW; and has ac-coupled, internally dc restored inputs. The output drives 2V p-p into two source-terminated 75V loads. The unit continuously monitors the cable characteristics and compensates for long-term cable aging. Several optional locking modes help maintain lock in noisy environments. An optional serial interface provides signal monitoring.

The ISL59605 is available in a 4×4-mm, 20-lead QFN package with suggested retail prices of $18.98 (1000). It operates over a −40 to +105°C temperature range. The ISL5960X-EvalZ demonstration board costs $250. The $350 ISL5960X-SPI (serial-peripheral-interface)-EvalZ provides user access to SPI for signal monitoring.

Intersil