Dual, Low Power
Video Op Amp
a
AD828
FEATURES
FUNCTIONAL BLOCK DIAGRAM
Excellent Video Performance
Differential Gain and Phase Error of 0.01% and 0.05ꢀ
High Speed
130 MHz 3 dB Bandwidth (G = +2)
450 V/ꢁs Slew Rate
1
2
3
4
OUT1
–IN1
+IN1
V–
8
7
6
5
V+
OUT2
–IN2
+IN2
80 ns Settling Time to 0.01%
Low Power
15 mA Max Power Supply Current
High Output Drive Capability
50 mA Minimum Output Current per Amplifier
Ideal for Driving Back Terminated Cables
Flexible Power Supply
AD828
Specified for +5 V, ꢂ5 V, and ꢂ15 V Operation
ꢂ3.2 V Min Output Swing into a 150 ꢃ Load
(VS = ꢂ5 V)
Excellent DC Performance
2.0 mV Input Offset Voltage
Available in 8-Lead SOIC and 8-Lead Plastic Mini-DIP
GENERAL DESCRIPTION
The AD828 is fully specified for operation with a single 5 V
power supply and with dual supplies from 5 V to 15 V. This
power supply flexibility, coupled with a very low supply current
of 15 mA and excellent ac characteristics under all power supply
conditions, make the AD828 the ideal choice for many demand-
ing yet power-sensitive applications.
The AD828 is a low cost, dual video op amp optimized for use
in video applications that require gains of +2 or greater and
high output drive capability, such as cable driving. Due to its
low power and single-supply functionality, along with excellent
differential gain and phase errors, the AD828 is ideal for power-
sensitive applications such as video cameras and professional
video equipment.
The AD828 is a voltage feedback op amp that excels as a gain
stage (gains > +2) or active filter in high speed and video systems
and achieves a settling time of 45 ns to 0.1%, with a low input
offset voltage of 2 mV max.
With video specs like 0.1 dB flatness to 40 MHz and low
differential gain and phase errors of 0.01% and 0.05°, along
with 50 mA of output current per amplifier, the AD828 is an
excellent choice for any video application. The 130 MHz gain
bandwidth and 450 V/µs slew rate make the AD828 useful in
many high speed applications, including video monitors, CATV,
color copiers, image scanners, and fax machines.
The AD828 is available in low cost, small 8-lead plastic mini-DIP
and SOIC packages.
0.03
+V
0.1ꢁF
0.02
DIFF GAIN
R
75ꢃ
BT
75ꢃ
V
IN
0.01
0.07
1/2
R
75ꢃ
T
AD828
R
75ꢃ
T
0.1ꢁF
1kꢃ
0.06
DIFF PHASE
–V
1kꢃ
0.05
0.04
Figure 1. Video Line Driver
5
10
15
SUPPLY VOLTAGE – ꢂV
Figure 2. Differential Phase vs. Supply Voltage
REV. C
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use, norforanyinfringementsofpatentsorotherrightsofthirdpartiesthat
may result from its use. No license is granted by implication or otherwise
under any patent or patent rights of Analog Devices.
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© Analog Devices, Inc., 2002