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High Performance Video Op Amp AD811

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 1

8 NC

–IN 2

7 +V S

+IN 3 –VS 4

6 OUTPUT

0.10

0.16 0.14 0.12

0.05

0.10 PHASE

0.04

0.08

0.03 0.02

0.06 GAIN

0.04

0.01 6

7

8

NC

16-Pin SOIC (R-16) Package 20-Pin SOIC (R-20) Package NC 1

16 NC

NC

1

20 NC

NC 2

15 NC

NC 2

19 NC

14 +V S

NC 3

18 NC

NC 4

13 NC

–IN 4

17 +V S

+IN

12 OUTPUT

NC

6

11 NC

+IN 6

–VS 7

10 NC

NC 7

14 NC

9 NC

–VS 8

13 NC

–IN

NC

3

5

AD811

NC 8

NC 9

NC = NO CONNECT

16 NC

5

15 OUTPUT

AD811

NC 10

12 NC 11 NC

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 volt step and 65 ns to 0.01% on a 10 volt 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. 12

0.02 5

NC NC NC NC

9 10 11 12 13 NC = NO CONNECT

9 10

11

12

13

14

15

SUPPLY VOLTAGE – ±Volts

G = +2 R L = 150Ω R G = R FB

9

VS = ±15V

6 GAIN – dB

0.18

DIFFERENTIAL PHASE – Degrees

DIFFERENTIAL GAIN – %

0.06

17 NC 16 +V S 15 NC 14 OUTPUT

NC = NO CONNECT

0.20 R F = 649Ω FC = 3.58MHz 100 IRE MODULATED RAMP R L = 150Ω

0.07

NC

–IN 6 NC 7 +IN 8

5 NC

AD811

18 NC

AD811

NC = NO CONNECT

The AD811 is a wideband current-feedback operational amplifier, optimized for broadcast quality video systems. The –3 dB bandwidth of 120 MHz at a gain of +2 and 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 the 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.

0.08

NC

3 2 1 20 19 NC 4 NC 5

PRODUCT DESCRIPTION

0.09

NC

NC

CONNECTION DIAGRAMS 20-Pin LCC (E-20A) Package 8-Pin Plastic (N-8) Cerdip (Q-8) SOIC (SO-8) Packages

–VS

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/␮s 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 ⍀) 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 ⍀ Load (VS = ؎5 V)

3 V S = ±5V 0

–3

–6 1M

10M

100M

FREQUENCY – Hz

REV. C 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 which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 617/329-4700 Fax: 617/326-8703


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