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Single-Supply, Fixed G = 2, High Speed, Video Amplifier with Charge Pump

Model: ADA4859-3

  • Integrated charge pump
  • Supply range: 3 V to 5.5 V
  • Output range: -3.3 V to -1.8 V
  • 50 mA maximum output current at -3 V for external use
  • High speed amplifiers
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The ADA4859-3 (triple) is a single-supply, high speed current feedback amplifier with an integrated charge pump that eliminates the need for negative supplies in order to output negative voltages or output a 0 V level for video applications. The 195 MHz, large signal -3 dB bandwidth at a fixed gain of 2, as well as the 740 V/microsecond slew rate, make this amplifier ideal for high resolution professional and consumer video applications. The amplifier also has a wide input common-mode voltage range that extends from 1.8 V below ground to 1.2 V below the positive rail at 5 V supply. This triple video amplifier is designed to operate on supply voltages of 3.3 V to 5 V, using only 38 mA total quiescent current, including the charge pump. To further reduce the power consumption, it is equipped with a power-down feature that lowers the total supply current to as low as 2 mA when the amplifier is not being used. Even in power-down mode, the charge pump can be used to power external components. The maximum output current for external use is 50 mA at -3 V. The ADA4858-3 is available in a 16-lead LFCSP, and it is designed to work over the industrial temperature range of -40°C to +105°C.
  • Integrated charge pump
  • Supply range: 3 V to 5.5 V
  • Output range: -3.3 V to -1.8 V
  • 50 mA maximum output current at -3 V for external use
  • High speed amplifiers
  • -3 dB bandwidth: 195 MHz
  • Slew rate: 740 V/micro s
  • 0.1 dB gain flatness: 60 MHz
  • 0.1% settling time: 20 ns
  • Low power
  • Total quiescent current: 38 mA
  • Power-down feature
  • High input common-mode voltage range
  • -1.8 V to +3.8 V at +5 V supply
  • Current feedback architecture
  • Differential gain error: 0.01%
  • Differential phase error: 0.02°
  • Available in 16-lead LFCSP
  • Applications include Professional video, Consumer video, Imaging, Active filters
 
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