High Performance Video Op Amp

AD811

Rev. E

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© 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)

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

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

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.

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CONNECTION DIAGRAMS

1

2

3

4

8

7

6

5

AD811

NC

–IN

+IN

NC

OUTPUT

NC

NC = NO CONNECT

Figure 1. 8-Lead Plastic (N-8), CERDIP (Q-8), SOIC (R-8)

NC

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

Figure 2. 16-Lead SOIC (R-16)

AD811

NC

NC

NC

OUTPUT

NC

NC

NC

–IN

+IN

NC = NO CONNECT

1

2

320 19

18

17

16

15

14

9 10 11 12 13

4

5

6

7

8

Figure 3. 20-Terminal LCC (E-20A)

+IN

–IN

AD811

NC

NC

NC

NC

NC

NC

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

Figure 4. 20-Lead SOIC (R-20)