High Performance Video Op Amp
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)
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
CONNECTION DIAGRAMS
Figure 1. 8-Lead Plastic (N-8), CERDIP (Q-8), SOIC_N (R-8)
Figure 2. 16-Lead SOIC_W (RW-16)
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.
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
NC
1
NC
2
–IN
3
NC
4
NC
16
NC
15
+V
S
14
NC
13
+IN
5
OUTPUT
12
NC
6
NC
11
–V
S
7
NC
10
NC
8
NC
9
NOTES
1. NC = NO CONNECT. DO NOT CONNECT TO THIS PIN.
AD811
TOP VIEW
(Not to Scale)
00866-E-002
4
NC
5
NC
6
–IN
7
NC
8
+IN
18
NC
17
NC
16
+V
S
15
NC
14
OUTPUT
19
NC
20
NC
1
NC
2
NC
3
NC
13
NC
12
NC
11
NC
10
NC
9
–V
S
TOP VIEW
(Not to Scale)
00866-E-003
AD811
NOTES
1. NC = NO CONNECT. DO NOT CONNECT TO THIS PIN.
Rev. G Document Feedback
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