High Performance Video Op Amp
AD811
Data Sheet
CONNECTION DIAGRAMS
APPLICATIONS
NC 1
–IN 2
8
NC
7
+IN 3
–VS 4
6
+VS
OUTPUT
5
NC
AD811
NC = NO CONNECT
00866-E-001
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 (RL =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 (VS = ±5 V)
Figure 1. 8-Lead Plastic (N-8), CERDIP (Q-8), SOIC-N (R-8)
NC 1
16
NC
15
NC
–IN 3
14
+VS
NC 4
13
NC
+IN 5
12
OUTPUT
NC 6
11
NC
AD811
NC 2
TOP VIEW
10 NC
(Not to Scale)
NC 8
9 NC
–VS 7
00866-E-002
FEATURES
NOTES
1. NC = NO CONNECT. DO NOT CONNECT TO THIS PIN.
NC
NC
NC
NC
NC
Figure 2. 16-Lead SOIC-W (RW-16)
3
2
1
20 19
NC
17
NC
–IN 6
16
+VS
NC 7
15
NC
14
OUTPUT
NC 5
TOP VIEW
(Not to Scale)
NC
NC
10 11 12 13
NC
9
NC
+IN 8
AD811
00866-E-003
18
NC 4
–VS
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 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° (RL = 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.
Rev. F
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 amplifier, 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.
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