Amplifier ICs
Volume 8, Issue 9 YOUR SEMICONDUCTOR SOLUTIONS RESOURCE

High Speed, Rail-to-Rail, Triple Amplifiers Deliver Cost Efficient, Lossless UXGA

The ADA4855-3 and ADA4856-3 triple amplifiers provide a wide output voltage range at a wide –3 dB bandwidth, allowing analog video systems to deliver cost efficient, high quality HD video for high speed video applications. Both devices are single supply, rail-to-rail output voltage feedback amplifiers that offer low output crosstalk and low power dissipation. The ADA4856-3 has fixed G = 2 output, providing cost and space savings for projectors, monitors, and computers that output HD video. The devices operate on 3.3 V to 5 V supplies and are available in 16-lead LFCSP packaging.

ADA4856-3 ADA4855-3

ADA4855-3

ADA4898-1 Features

  • High speed ADA4855-3
    • 63 MHz, 0.1 dB flatness
    • 400 MHz, –3 dB bandwidth
    • 800 V/µs slew rate
  • High speed ADA4856-3
    • 85 MHz, 0.1 dB flatness
    • 220 MHz, –3 dB bandwidth
    • 620 V/µs slew rate
  • 6 ns settling time to 1% with 2 V step
  • Rail-to-rail output swing: 0.2 V to 4.85 V
  • Low offset voltage: 1 mV
  • Excellent video specs
    • 0.01% differential gain error
    • 0.01% differential phase error
  • Typical supply current: 7.7 mA/amplifier

Compact Video Filter and Buffer Supports HD and SD Signals Simultaneously

The ADA4420-6 is a low cost video reconstruction filter and buffer specifically designed for consumer applications. It consists of six independent filter channels: three for standard definition (Y/C, CVBS) and three for high definition component (YPrPb or RGB) signals. The device operates on a single 5 V supply, making it ideal for applications where power consumption is critical. The disable feature allows further power conservation by reducing the supply current to, typically, 10 µA when the ADA4420-6 is not in use.

Applications include DVD players and recorders, game consoles, media servers, and set-top boxes. The ADA4420-6 operates in the extended industrial temperature range of –40°C to +85°C and is available in 20-lead TSSOP pinout and 16-lead QSOP pinout packaging.

ADA4420-6 Features

  • Sixth-order filters
  • –1 dB flatness out to 26 MHz min
  • Rejection: 35 dB @ 75 MHz min
  • Group delay: 10 ns max
  • Differential gain: 0.5% typical
  • Differential phase: 0.5° typical
  • Input sync tip clamp
  • Rail-to-rail output
  • Drives two 75 Ω video loads in parallel
  • Built-in dc offset of 250 mV
  • Disable feature
  • TSSOP and QSOP packaging

Making accurate, high speed time domain measurements can be challenging, but finding information that will help improve one's techniques shouldn't be. Learn a few tricks of the trade at www.analog.com/analogdialogue/41-03.

Previous     Next

Back to top