Single-Supply, High Speed, Fixed G = +2,
Rail-to-Rail Output Video Amplifier
ADA4856-3
CONNECTION DIAGRAM
FEATURES
Voltage feedback architecture
Rail-to-rail output swing: 0.1 V to 4.9 V
High speed amplifier
16
15
14
13
−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
−VS − 0.2 V to +VS − 1 V
NC
+IN2
NC
1
2
3
4
12
+V
S
11 OUT2
10 –IN2
ADA4856-3
+V
PD
9
S
Supply range: 3 V to 5.5 V
Differential gain error: 0.01%
Differential phase error: 0.01°
Low power
5
6
7
8
7.8 mA/amplifier typical supply current
Power-down feature
Available in 16-lead LFCSP
NOTES
1. NC = NO CONNECT.
2. EXPOSED PAD CONNECTED TO –V .
S
Figure 1.
APPLICATIONS
Professional video
Consumer video
Imaging
Instrumentation
Base stations
Active filters
Buffers
7
6
5
4
3
2
1
0
GENERAL DESCRIPTION
V
= 5V, V
OUT
= 1.4V p-p
S
V
= 3.3V, V = 1.4V p-p
OUT
S
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.
V
= 3.3V, V
= 2V p-p
S
OUT
V
= 5V, V = 2V p-p
OUT
S
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.
R
= 150Ω
L
1
10
100
1000
FREQUENCY (MHz)
Figure 2. Large Signal Frequency Response
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.
Rev. 0
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