Single-Supply, High Speed, Fixed G = +2,

Rail-to-Rail Output Video Amplifier

Data Sheet

ADA4856-3

Rev. B

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FEATURES

Voltage feedback architecture

Rail-to-rail output swing: 0.1 V to 4.9 V

High speed amplifier

−3 dB bandwidth: 225 MHz

0.1 dB flatness at 2 V p-p: 74 MHz

Slew rate: 800 V/μs

Settling time to 0.1% with 2 V step: 5 ns

High input common-mode voltage range

Supply range: 3 V to 5.5 V

Differential gain error: 0.01%

Differential phase error: 0.01°

Low power

7.8 mA/amplifier typical supply current

Power-down feature

Available in 16-lead LFCSP

APPLICATIONS

Professional video

Consumer video

Imaging

Instrumentation

Base stations

Active filters

Buffers

CONNECTION DIAGRAM

1

2

+IN2

NC

PD

NC

3

4

56

7

8

16

15

14

13

11 OUT2

10 –IN2

NOTES

1. NC = NO CONNECT.

ADA4856-3

Figure 1.

GENERAL DESCRIPTION

The ADA4856-3 (triple) is a fixed gain of +2, single-supply, rail-

to-rail output video amplifier. It provides excellent video

performance with 225 MHz, −3 dB bandwidth, 800 V/μs slew rate,

and 74 MHz, 0.1 dB flatness into a 150 Ω load. It has a wide

input common-mode voltage range that extends 0.2 V below

ground and 1 V below the positive rail. In addition, the output

voltage swings within 200 mV of either supply, making this video

amplifier easy to use on single-supply voltages as low as 3.3 V.

The ADA4856-3 offers a typical low power of 7.8 mA per amplifier,

while being capable of delivering up to 52 mA of load current.

It also features a power-down function for power sensitive

applications that reduces the supply current to 1 mA.

The ADA4856-3 is available in a 16-lead LFCSP and is designed

to work over the extended industrial temperature range of

−40°C to +105°C.

7

6

5

4

3

2

1

0

1

10

100

1000

FREQUENCY (MHz)

Figure 2. Large Signal Frequency Response