AD818_03 Datasheet, PDF (1/16 Pages) Analog Devices – Low Cost, Low Power Video Op Amp

Low Cost, Low Power
Video Op Amp
AD818
FEATURES
Low Cost
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% (V_O = 10 V Step)
High Output Drive Capability
50 mA Minimum Output Current
Ideal for Driving Back Terminated Cables
Flexible Power Supply
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
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.
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
+15V
0.01␮F
2.2␮F
V_IN
1k⍀
REV. C
AD818
0.1␮F
R_BT
75⍀
75⍀
2.2␮F
R_T
75⍀
–15V
1k⍀
Figure 1. Video Line Driver
CONNECTION DIAGRAM
8-Lead Plastic Mini-DIP (N) and SOIC (R) Packages
NULL ₁
–IN 2
+IN 3
AD818
8 NULL
7 +V_S
6 OUTPUT
–V_S 4
TOP VIEW
5 NC
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.
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.
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.
The AD818 is available in low cost, small 8-lead PDIP and
SOIC packages.
0.02
DIFF GAIN
0.01
0.06
0.00
0.05
DIFF PHASE
0.04
0.03
5
10
15
SUPPLY VOLTAGE (؎V)
Figure 2. Differential Gain and Phase vs. Supply
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