The EL1883IS-EVAL eval board simplifies the evaluation of the EL1883, a sync separator for both standard and non-standard video signals. It provides composite sync, vertical sync, burst/back porch timing, and odd/even field detection.

An external resistor RSET that sets all internal timing. The demo board is built with a 681kΩ resistor for standard NTSC and PAL video signals. If the input video signal is very noisy, a low pass filter is required at pin 2. In this case, RF = 100 and CF = 570pF provide a 2.79MHz LPF. This sufficiently attenuates a 3.58MHz or 4.43MHz color burst and passes the approximately 15.7kHz sync signals without appreciable attenuation. If the input video signal is clear, then simply just short the RF and open CF on the board.

The PC board layout has been optimized for high-speed signals. Careful attention is given to the signal paths, power supply bypassing, and grounding. Small surface mount ceramic capacitors are placed as close as possible to the supply pins. To avoid noise problems, RSET and CSET need to be placed close to the device.

特性

  • Fixed 70mV slicing of video input levels from 0.5VP-P to 2VP-P
  • Low 1.5mA supply current
  • Fully assembled and tested

应用

  • Video amplifiers
  • Personal computer memory card international association (PCMCIA) applications
  • A/D drivers
  • Line drivers
  • Portable computers

tune产品选择

器件号 Part Status Buy Sample
EL1883IS-EVAL
Obsolete
Availability

description文档

文档标题 language 类型 文档格式 文件大小 日期
使用指南与说明
star EL1881, EL1883 Evaluation Boards User Guide 指南 PDF 241 KB