Data Sheet
FEATURES
High speed
140 MHz bandwidth (3 dB, G = +1)
120 MHz bandwidth (3 dB, G = +2)
35 MHz bandwidth (0.1 dB, G = +2)
2500 V/µs slew rate
25 ns settling time to 0.1% (for a 2 V step)
65 ns settling time to 0.01% (for a 10 V step)
Excellent video performance (R
L
=150 Ω)
0.01% differential gain, 0.01° differential phase
Voltage noise of 1.9 nV/√Hz
Low distortion: THD = −74 dB at 10 MHz
Excellent dc precision: 3 mV max input offset voltage
Flexible operation
Specified for ±5 V and ±15 V operation
±2.3 V output swing into a 75 Ω load (V
S
= ±5 V)
High Performance Video Op Amp
AD811
CONNECTION DIAGRAMS
NC
1
–IN
2
+IN
3
–V
S 4
8
7
6
NC
+V
S
OUTPUT
NC
AD811
5
NC = NO CONNECT
Figure 1. 8-Lead Plastic (N-8), CERDIP (Q-8), SOIC_N (R-8)
NC
1
NC
2
–IN
3
NC
4
+IN
5
NC
6
–V
S 7
16
NC
AD811
15
NC
14
+V
S
13
NC
12
OUTPUT
11
NC
00866-E-002
TOP VIEW
10
NC
(Not to Scale)
9
NC
NC
8
APPLICATIONS
Video crosspoint switchers, multimedia broadcast systems
HDTV compatible systems
Video line drivers, distribution amplifiers
ADC/DAC buffers
DC restoration circuits
Medical
Ultrasound
PET
Gamma
Counter applications
MIL-STD-883B parts available
NOTES
1. NC = NO CONNECT. DO NOT CONNECT TO THIS PIN.
Figure 2. 16-Lead SOIC_W (RW-16)
NC
NC
NC
NC
3
2
1
20 19
18
NC
NC
4
NC
5
–IN
6
NC
7
+IN
8
TOP VIEW
(Not to Scale)
9
10 11 12 13
NC
AD811
17
NC
16
+V
S
15
NC
14
OUTPUT
00866-E-003
NC
NC
NC
NOTES
1. NC = NO CONNECT. DO NOT CONNECT TO THIS PIN.
Figure 3. 20-Terminal LCC (E-20-1)
GENERAL DESCRIPTION
A wideband current feedback operational amplifier, the
AD811
is optimized for broadcast-quality video systems. The −3 dB
bandwidth of 120 MHz at a gain of +2 and the differential gain
and phase of 0.01% and 0.01° (R
L
= 150 Ω) make the
AD811
an
excellent choice for all video systems. The
AD811
is designed to
meet a stringent 0.1 dB gain flatness specification to a bandwidth of
35 MHz (G = +2) in addition to low differential gain and phase
errors. This performance is achieved whether driving one or two
back-terminated 75 Ω cables, with a low power supply current
of 16.5 mA. Furthermore, the
AD811
is specified over a power
supply range of ±4.5 V to ±18 V.
The
AD811
is also excellent for pulsed applications where
transient response is critical. It can achieve a maximum slew
rate of greater than 2500 V/µs with a settling time of less than
25 ns to 0.1% on a 2 V step and 65 ns to 0.01% on a 10 V step.
The
AD811
is ideal as an ADC or DAC buffer in data acquisition
systems due to its low distortion up to 10 MHz and its wide unity
gain bandwidth. Because the
AD811
is a current feedback ampli-
fier, this bandwidth can be maintained over a wide range of
gains. The
AD811
also offers low voltage and current noise of
1.9 nV/√Hz and 20 pA/√Hz, respectively, and excellent dc
accuracy for wide dynamic range applications.
Rev. G
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Trademarks and registered trademarks are the property of their respective owners.
–V
S
NC
00866-E-001
AD811* PRODUCT PAGE QUICK LINKS
Last Content Update: 02/23/2017
COMPARABLE PARTS
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REFERENCE MATERIALS
Tutorials
•
MT-034: Current Feedback (CFB) Op Amps
•
MT-057: High Speed Current Feedback Op Amps
•
MT-059: Compensating for the Effects of Input
Capacitance on VFB and CFB Op Amps Used in Current-to-
Voltage Converters
EVALUATION KITS
•
Universal Evaluation Board for Single High Speed
Operational Amplifiers
DOCUMENTATION
Application Notes
•
AN-216: Video VCAs and Keyers Using the AD834 and
AD811
•
AN-417: Fast Rail-to-Rail Operational Amplifiers Ease
Design Constraints in Low Voltage High Speed Systems
•
AN-649: Using the Analog Devices Active Filter Design
Tool
•
AN-692: Universal Precision Op Amp Evaluation Board
Data Sheet
•
AD811: High Performance Video Op Amp Data Sheet
•
AD811: Military Data Sheet
User Guides
•
UG-755: 8-Lead SOIC Amplifier Evaluation Board User
Guide
DESIGN RESOURCES
•
AD811 Material Declaration
•
PCN-PDN Information
•
Quality And Reliability
•
Symbols and Footprints
DISCUSSIONS
View all AD811 EngineerZone Discussions.
SAMPLE AND BUY
Visit the product page to see pricing options.
TECHNICAL SUPPORT
Submit a technical question or find your regional support
number.
TOOLS AND SIMULATIONS
•
Analog Filter Wizard
•
Analog Photodiode Wizard
•
AD811 SPICE Macro-Model
DOCUMENT FEEDBACK
Submit feedback for this data sheet.
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AD811
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
Connection Diagrams ...................................................................... 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Absolute Maximum Ratings ............................................................ 5
Maximum Power Dissipation ..................................................... 5
Metalization Photograph ............................................................. 5
ESD Caution .................................................................................. 5
Data Sheet
Typical Performance Characteristics ..............................................6
Applications Information .............................................................. 12
General Design Considerations ............................................... 12
Achieving the Flattest Gain Response at High Frequency.... 12
Operation as a Video Line Driver ............................................ 14
An 80 MHz Voltage-Controlled Amplifier Circuit................ 15
A Video Keyer Circuit ............................................................... 16
Outline Dimensions ....................................................................... 18
Ordering Guide .......................................................................... 20
REVISION HISTORY
4/15—Rev. F to Rev. G
Changes to Figure 25 ........................................................................ 9
Changes to Ordering Guide .......................................................... 20
2/14—Rev. E to Rev. F
Changes to R-8 Package, RW-16 Package, and E-20-1 Package;
Deleted R-20 Package .................................................... Throughout
Changes to Applications Section .................................................... 1
Removed Figure 4; Renumbered Sequentially.............................. 1
Moved Figure 4 and Figure 5 .......................................................... 6
Changes to An 80 MHz Voltage-Controlled Amplifier
Circuit Section ................................................................................ 15
Updated Outline Dimensions, Removed Figure 54 ................... 18
Changes to Ordering Guide .......................................................... 19
7/04—Rev. D to Rev. E
Updated Format .................................................................. Universal
Change to Maximum Power Dissipation Section ........................ 7
Changes to Ordering Guide .......................................................... 20
Updated Outline Dimensions ....................................................... 20
Rev. G | Page 2 of 20
Data Sheet
SPECIFICATIONS
At T
A
= +25°C, V
S
= ±15 V dc, R
LOAD
= 150 Ω, unless otherwise noted.
Table 1.
Parameter
DYNAMIC PERFORMANCE
Small Signal Bandwidth (No Peaking)
−3 dB
G = +1
G = +2
G = +2
G = +10
0.1 dB Flat
G = +2
Full Power Bandwidth
3
Slew Rate
Settling Time to 0.1%
Settling Time to 0.01%
Settling Time to 0.1%
Rise Time, Fall Time
Differential Gain
Differential Phase
THD at f
C
= 10 MHz
Third-Order Intercept
4
INPUT OFFSET VOLTAGE
T
MIN
to T
MAX
Offset Voltage Drift
INPUT BIAS CURRENT
−Input
T
MIN
to T
MAX
+Input
TRANSRESISTANCE
T
MIN
to T
MAX
T
MIN
to T
MAX
V
OUT
= ±10 V
R
L
= ∞
R
L
= 200 Ω
V
OUT
= ±2.5 V
R
L
= 150 Ω
±5 V, ±1 5 V
2
5
±5 V, ±15 V
2
5
15
10
20
Conditions
V
S
AD811J/AD811A
1
Min Typ
Max
AD811S
2
Min
Typ
Max
AD811
Unit
R
FB
= 562 Ω
R
FB
= 649 Ω
R
FB
= 562 Ω
R
FB
= 511 Ω
R
FB
= 562 Ω
R
FB
= 649 Ω
V
OUT
= 20 V p-p
V
OUT
= 4 V p-p
V
OUT
= 20 V p-p
10 V Step, A
V
= − 1
10 V Step, A
V
= − 1
2 V Step, A
V
= − 1
R
FB
= 649, A
V
= +2
f = 3.58 MHz
f = 3.58 MHz
V
OUT
= 2 V p-p, A
V
= +2
At f
C
= 10 MHz
±15 V
±15 V
±15 V
±15 V
±15
±15
±15
±15
±15
±15
±15
±15
±15
±15
±15
±15
±15
±15
±5 V, ±15 V
140
120
80
100
25
35
40
400
2500
50
65
25
3.5
0.01
0.01
−74
36
43
0.5
140
120
80
100
25
35
40
400
2500
50
65
25
3.5
0.01
0.01
−74
36
43
0.5
5
2
2
5
30
10
25
MHz
MHz
MHz
MHz
MHz
MHz
MHz
V/µs
V/µs
ns
ns
ns
ns
%
Degree
dBc
dBm
dBm
mV
mV
µV/°C
µA
µA
µA
µA
3
5
3
5
±15 V
±15 V
±5 V
0.75
0.5
0.25
1.5
0.75
0.4
0.75
0.5
0.125
1.5
0.75
0.4
MΩ
MΩ
MΩ
COMMON-MODE REJECTION
V
OS
(vs. Common Mode)
T
MIN
to T
MAX
T
MIN
to T
MAX
Input Current (vs. Common Mode)
POWER SUPPLY REJECTION
V
OS
+Input Current
−Input Current
V
CM
= ±2.5 V
V
CM
= ±10 V
T
MIN
to T
MAX
V
S
= ±4.5 V to ±18 V
T
MIN
to T
MAX
T
MIN
to T
MAX
T
MIN
to T
MAX
±5 V
±15 V
56
60
60
66
1
70
0.3
0.4
50
56
3
60
2
2
60
66
1
70
0.3
0.4
3
dB
dB
µA/V
dB
µA/V
µA/V
60
2
2
Rev. G | Page 3 of 20
AD811
Parameter
INPUT VOLTAGE NOISE
INPUT CURRENT NOISE
OUTPUT CHARACTERISTICS
Voltage Swing, Useful Operating
Range
5
Output Current
Short-Circuit Current
Output Resistance
INPUT CHARACTERISTIC
+Input Resistance
−Input Resistance
Input Capacitance
Common-Mode Voltage Range
POWER SUPPLY
Operating Range
Quiescent Current
TRANSISTOR COUNT
1
2
Data Sheet
Conditions
f = 1 kHz
f = 1 kHz
±5 V
±15 V
T
J
= 25°C
(Open Loop at 5 MHz)
V
S
AD811J/AD811A
1
Min Typ
Max
1.9
20
±2.9
±12
100
150
9
1.5
14
7.5
±3
±13
±4.5
±5 V
±15 V
Number of Transistors
14.5
16.5
40
±18
16.0
18.0
±4.5
14.5
16.5
40
AD811S
2
Min
Typ
Max
1.9
20
±2.9
±12
100
150
9
1.5
14
7.5
±3
±13
±18
16.0
18.0
Unit
nV/√Hz
pA/√Hz
V
V
mA
mA
Ω
MΩ
Ω
pF
V
V
V
mA
mA
+Input
±5 V
±15 V
The
AD811JR
is specified with ±5 V power supplies only, with operation up to ±12 V.
See the Analog Devices military data sheet for 883B tested specifications.
3
FPBW = slew rate/(2 π V
PEAK
).
4
Output power level, tested at a closed-loop gain of two.
5
Useful operating range is defined as the output voltage at which linearity begins to degrade.
Rev. G | Page 4 of 20
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