High Performance Video Op Amp
AD811
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 @ 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)
CONNECTION DIAGRAMS
NC
1
–IN
2
+IN
3
–V
S 4
8
NC
7
+V
S
6
OUTPUT
AD811
5
NC
NC = NO CONNECT
Figure 1. 8-Lead Plastic (N-8), CERDIP (Q-8), SOIC (R-8)
NC
1
NC
2
–IN
3
16
15
14
13
12
11
NC
NC
+V
S
NC
OUTPUT
NC
NC
NC
00866-E-002
NC
4
+IN
5
NC
6
–V
S 7
NC
8
AD811
10
9
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
NC = NO CONNECT
Figure 2. 16-Lead SOIC (R-16)
NC
NC
NC
NC
NC
3 2 1 20 19
NC
NC
–IN
NC
+IN
4
5
6
7
8
9 10 11 12 13
AD811
17
NC
NC
16
+V
S
15
NC
14
OUTPUT
18
00866-E-003
NC = NO CONNECT
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 band-
width 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.
(Continued on page 3)
Figure 3. 20-Terminal LCC (E-20A)
NC
1
NC
2
NC
3
–IN
4
NC
5
+IN
6
NC
7
–V
S 8
NC
9
NC
10
20
NC
19
NC
18
NC
17
+V
S
16
NC
15
OUTPUT
14
NC
13
NC
–V
S
NC
NC
NC
NC
11
NC
NC = NO CONNECT
Figure 4. 20-Lead SOIC (R-20)
Rev. E
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 that may result from its use.
Specifications subject to change without notice. No license is granted by implication
or otherwise under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.326.8703
© 2004 Analog Devices, Inc. All rights reserved.
00866-E-004
AD811
12
NC
00866-E-001
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