Low Cost, Low Power
Video Op Amp
AD818
FEATURES
CONNECTION DIAGRAM
Low Cost
8-Lead Plastic Mini-DIP (N) and SOIC (R) Packages
Excellent Video Performance
55 MHz 0.1 dB Bandwidth (Gain = +2)
0.01% and 0.05؇ Differential Gain and Phase Errors
High Speed
130 MHz Bandwidth (3 dB, G = +2)
100 MHz Bandwidth (3 dB, G+ = –1)
500 V/s Slew Rate
80 ns Settling Time to 0.01% (VO = 10 V Step)
High Output Drive Capability
50 mA Minimum Output Current
Ideal for Driving Back Terminated Cables
Flexible Power Supply
NULL
NULL
8
7
6
5
1
2
3
4
AD818
+V
S
–IN
+IN
OUTPUT
NC
–V
S
TOP VIEW
NC = NO CONNECT
any video application. The 130 MHz 3 dB bandwidth (G = +2)
and 500 V/ms slew rate make the AD818 useful in many high speed
applications including video monitors, CATV, color copiers,
image scanners, and fax machines.
Specified for Single (+5 V) and Dual (؎5 V to ؎15 V)
Power Supplies
Low Power: 7.5 mA Max Supply Current
Available in 8-Lead SOIC and 8-Lead PDIP
The AD818 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 7.5 mA and excellent ac characteristics under all power sup-
ply conditions, make the AD818 the ideal choice for many
demanding yet power sensitive applications.
GENERAL DESCRIPTION
The AD818 is a low cost video op amp optimized for use in
video applications that require gains equal to or greater than +2
or –1. The AD818’s low differential gain and phase errors,
single supply functionality, low power, and high output drive
make it ideal for cable driving applications such as video
cameras and professional video equipment.
The AD818 is a voltage feedback op amp and excels as a gain
stage in high speed and video systems (gain ≥ 2, or gain £ –1). It
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 55 MHz and low differ-
ential gain and phase errors of 0.01% and 0.05∞, along with
50 mA of output current, the AD818 is an excellent choice for
The AD818 is available in low cost, small 8-lead PDIP and
SOIC packages.
+15V
0.02
0.01F
2.2F
DIFF GAIN
0.01
R
BT
75⍀
V
IN
75⍀
AD818
0.06
0.05
0.04
0.03
0.00
R
75⍀
T
DIFF PHASE
0.1F
2.2F
–15V
1k⍀
5
10
15
1k⍀
SUPPLY VOLTAGE (؎V)
Figure 2. Differential Gain and Phase vs. Supply
Figure 1. Video Line Driver
REV. C
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