ADA4859-3

单电源，固定G = 2 ，高速视频放大器与电荷泵 Single-Supply, Fixed G = 2, High Speed, Video Amplifier with Charge Pump

Product Details

The 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/μs 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.

**Applications**

* Professional video

* Consumer video

* Imaging

* Active filters

Data Sheet, Rev. 0, 11/2008

### Features and Benefits

.

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/μs

0.1 dB gain flatness: 60 MHz

0.1% settling time: 20 ns

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Low power

Total quiescent current: 38 mA

Power-down feature

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High input common-mode voltage range

−1.8 V to +3.8 V at +5 V supply

.

Current feedback architecture

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Differential gain error: 0.01%

.

Differential phase error: 0.02°

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Available in 16-lead LFCSP