High Performance Video Op Amp
AD811
Rev. E
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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
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Tel: 781.329.4700
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Fax: 781.326.8703 © 2004 Analog Devices, Inc. All rights reserved.
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)
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
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)
CONNECTION DIAGRAMS
1
2
3
4
8
7
6
5
AD811
NC
–IN
+IN
–V
S
+V
S
NC
OUTPUT
NC
NC = NO CONNECT
00866-E-001
Figure 1. 8-Lead Plastic (N-8), CERDIP (Q-8), SOIC (R-8)
NC
+V
S
–V
S
AD811
NC
–IN
NC
+IN
NC
NC
NC
NC
OUTPUT
NC
NC = NO CONNECT
NC
NC
NC
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
00866-E-002
Figure 2. 16-Lead SOIC (R-16)
AD811
NC
NC
NC
OUTPUT
–V
S
+V
S
NC
NC
NC
NC
–IN
+IN
NC
NC
NC
NC
NC
NC = NO CONNECT
NC
NC
NC
1232019
18
17
16
15
14
9
10 11
12 13
4
5
6
7
8
00866-E-003
Figure 3. 20-Terminal LCC (E-20A)
+IN
–IN
AD811
NC
NC
NC
NC
NC
NC
+V
S
V
S
NC
OUTPUT
NC
NC
NC = NO CONNECT
NC
NC
NC
NC
NC
NC
3
4
5
6
7
8
9
10
18
17
16
15
14
13
12
11
1
2
20
19
00866-E-004
Figure 4. 20-Lead SOIC (R-20)
