REV. B
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
a
Low Cost, Low Power
Video Op Amp
AD818
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
World Wide Web Site: http://www.analog.com
Fax: 781/326-8703
Analog Devices, Inc., 2000
FEATURES
Low Cost
Excellent Video Performance
55 MHz 0.1 dB Bandwidth (Gain = +2)
0.01% & 0.05 Differential Gain & 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 Plastic Mini-DIP
PRODUCT DESCRIPTION
The AD818 is a low cost, video op amp optimized for use in
video applications which require gains equal to or greater than
+2 or 1. The AD818 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 cam-
eras 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
any video application. The 130 MHz 3 dB bandwidth (G = +2)
AD818
1k
1k
+15V
Rbt
75
Rt
75
V
IN
3
2
75
15V
0.1F
2.2F
4
0.01F
2.2F
7
6
AD818 Video Line Driver
and 500 V/
s 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
supply 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 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 plastic mini-
DIP and SOIC packages.
0.03
15
0.06
0.04
0.05
5
10
DIFFERENTIAL PHASE
Degrees
SUPPLY VOLTAGE Volts
DIFFERENTIAL GAIN
Percent
0.02
0.01
0.00
DIFF GAIN
DIFF PHASE
AD818 Differential Gain and Phase vs. Supply
CONNECTION DIAGRAMS
8-Lead Plastic Mini-DIP (N), and
SOIC (R) Packages
NULL
IN
+IN
OUTPUT
NULL
1
2
3
4
8
7
6
5
V
S
TOP VIEW
+V
S
AD818
NC
NC = NO CONNECT
AD818
AD818A
Parameter
Conditions
V
S
Min
Typ
Max
Units
INPUT COMMON-MODE VOLTAGE
RANGE
5 V
+3.8
+4.3
V
2.7
3.4
V
15 V
+13
+14.3
V
12
13.4
V
0, +5 V
+3.8
+4.3
V
+1.2
+0.9
V
OUTPUT VOLTAGE SWING
R
LOAD
= 500
5 V
3.3
3.8
V
R
LOAD
= 150
5 V
3.2
3.6
V
R
LOAD
= 1 k
15 V
13.3
13.7
V
R
LOAD
= 500
15 V
12.8
13.4
V
R
LOAD
= 500
0, +5 V
+1.5,
+3.5
V
Output Current
15 V
50
mA
5 V
50
mA
0, +5 V
30
mA
Short-Circuit Current
15 V
90
mA
INPUT RESISTANCE
300
k
INPUT CAPACITANCE
1.5
pF
OUTPUT RESISTANCE
Open Loop
8
POWER SUPPLY
Operating Range
Dual Supply
2.5
18
V
Single Supply
+5
+36
V
Quiescent Current
5 V
7.0
7.5
mA
T
MIN
to T
MAX
5 V
7.5
mA
15 V
7.5
mA
T
MIN
to T
MAX
15 V
7.0
7.5
mA
NOTE
1
Full power bandwidth = slew rate/2
V
PEAK
.
Specifications subject to change without notice.
ABSOLUTE MAXIMUM RATINGS
1
Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
18 V
Internal Power Dissipation
2
Plastic (N) . . . . . . . . . . . . . . . . . . . . . . See Derating Curves
Small Outline (R) . . . . . . . . . . . . . . . . . See Derating Curves
Input Voltage (Common Mode) . . . . . . . . . . . . . . . . . . . .
V
S
Differential Input Voltage . . . . . . . . . . . . . . . . . . . . . . . .
6 V
Output Short Circuit Duration . . . . . . . . See Derating Curves
Storage Temperature Range (N, R) . . . . . . . 65
C to +125C
Operating Temperature Range . . . . . . . . . . . 40
C to +85C
Lead Temperature Range (Soldering 10 seconds) . . . . +300
C
NOTES
1
Stresses above those listed under Absolute Maximum Ratings may cause perma-
nent damage to the device. This is a stress rating only; functional operation of the
device at these or any other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect device reliability.
2
Specification is for device in free air: 8-lead plastic package,
JA
= 90
C/W; 8-lead
SOIC package,
JA
= 155
C/W.
ORDERING GUIDE
Temperature
Package
Package
Model
Range
Description
Option
AD818AN
40
C to +85C
8-Lead
N-8
Plastic DIP
AD818AR
40
C to +85C
8-Lead
SO-8
Plastic SOIC
AD818AR-REEL
40
C to +85C
13" Tape & Reel
SO-8
AD818AR-REEL7 40
C to +85C
7" Tape & Reel
SO-8
3
REV. B
2.0
0
50
+90
1.5
0.5
30
1.0
+50
+70
+30
+10
10
+80
40
+40
+60
+20
0
20
AMBIENT TEMPERATURE
C
MAXIMUM POWER DISSIPATION
Watts
8-LEAD MINI-DIP PACKAGE
8-LEAD SOIC PACKAGE
T
J
= 150
C
Maximum Power Dissipation vs. Temperature for Differ-
ent Package Types
ESD SUSCEPTIBILITY
ESD (electrostatic discharge) sensitive device. Electrostatic
charges as high as 4000 volts, which readily accumulate on the
human body and on test equipment, can discharge without de-
tection. Although the AD818 features proprietary ESD protec-
tion circuitry, permanent damage may still occur on these
devices if they are subjected to high energy electrostatic dis-
charges. Therefore, proper ESD precautions are recommended
to avoid any performance degradation or loss of functionality.
AD818
REV. B
5
70
30
60
140
60
40
40
50
100
120
80
60
40
20
0
20
95
85
75
65
55
PHASE MARGIN
Degrees
3dB BANDWIDTH
MHz
TEMPERATURE C
PHASE MARGIN
GAIN/BANDWIDTH
Figure 8. 3 dB Bandwidth and Phase Margin vs.
Temperature. Gain = +2
9
6
3
100
1k
10k
4
5
7
8
LOAD RESISTANCE Ohms
OPEN-LOOP GAIN
V/mV
15V
5V
Figure 9. Open-Loop Gain vs. Load Resistance
130
30
140
90
50
40
70
60
110
120
100
80
60
40
20
0
20
TEMPERATURE C
SHORT CIRCUIT CURRENT
mA
SOURCE CURRENT
SINK CURRENT
Figure 10. Short Circuit Current vs. Temperature
-40C
8.0
6.0
0
20
7.5
6.5
5
7.0
10
15
SUPPLY VOLTAGE Volts
QUIESCENT SUPPLY CURRENT
mA
+25C
+85C
Figure 5. Quiescent Supply Current vs. Supply Voltage
100
1
0.01
1k
10k
100M
10M
1M
100k
0.1
10
FREQUENCY Hz
CLOSED-LOOP OUTPUT IMPEDANCE
Ohms
Figure 6. Closed-Loop Output Impedance vs. Frequency
7
1
140
4
2
40
3
60
6
5
120
80
60
40
100
20
0
20
TEMPERATURE
C
INPUT BIAS CURRENT
A
Figure 7. Input Bias Current vs. Temperature
PDF 
ZIP
