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
