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Low Power Video Op Amp with Disable AD810

FEATURES High Speed 80 MHz Bandwidth (3 dB, G = +1) 75 MHz Bandwidth (3 dB, G = +2) 1000 V/␮s Slew Rate 50 ns Settling Time to 0.1% (VO = 10 V Step) Ideal for Video Applications 30 MHz Bandwidth (0.1 dB, G = +2) 0.02% Differential Gain 0.04؇ Differential Phase Low Noise 2.9 nV/√Hz Input Voltage Noise 13 pA/√Hz Inverting Input Current Noise Low Power 8.0 mA Supply Current max 2.1 mA Supply Current (Power-Down Mode) High Performance Disable Function Turn-Off Time 100 ns Break Before Make Guaranteed Input to Output Isolation of 64 dB (OFF State) Flexible Operation Specified for ؎5 V and ؎15 V Operation ؎2.9 V Output Swing Into a 150 ⍀ Load (VS = ؎5 V) APPLICATIONS Professional Video Cameras Multimedia Systems NTSC, PAL & SECAM Compatible Systems Video Line Driver ADC/DAC Buffer DC Restoration Circuits

CONNECTION DIAGRAM 8-Pin Plastic Mini-DIP (N), SOIC (R) and Cerdip (Q) Packages OFFSET NULL

1

8

DISABLE

–IN

2

7

+V S

+IN

3

6

OUTPUT

–VS

4

5

OFFSET NULL

AD810

TOP VIEW

PRODUCT DESCRIPTION

The AD810 is a composite and HDTV compatible, current feedback, video operational amplifier, ideal for use in systems such as multimedia, digital tape recorders and video cameras. The 0.1 dB flatness specification at bandwidth of 30 MHz (G = +2) and the differential gain and phase of 0.02% and 0.04° (NTSC) make the AD810 ideal for any broadcast quality video system. All these specifications are under load conditions of 150 Ω (one 75 Ω back terminated cable). The AD810 is ideal for power sensitive applications such as video cameras, offering a low power supply current of 8.0 mA max. The disable feature reduces the power supply current to only 2.1 mA, while the amplifier is not in use, to conserve power. Furthermore the AD810 is specified over a power supply range of ± 5 V to ± 15 V. The AD810 works well as an ADC or DAC buffer in video systems due to its unity gain bandwidth of 80 MHz. Because the AD810 is a transimpedance amplifier, this bandwidth can be maintained over a wide range of gains while featuring a low noise of 2.9 nV/√Hz for wide dynamic range applications. 0.20

–45 –90

CLOSED-LOOP GAIN – dB

1

–135 VS = ±15V

0

–180 GAIN

±5V –225

–1 ±2.5V

DIFFERENTIAL GAIN – %

PHASE

PHASE SHIFT – Degrees

GAIN = +2 RL = 150Ω

0.09

GAIN = +2 RF = 715Ω RL = 150Ω fC = 3.58MHz 100 IRE MODULATED RAMP

0.08 0.07

0.18 0.16 0.14 0.12

0.06

0.10

0.05 GAIN

0.04

0.08

PHASE

0.03

0.06

0.02

0.04

0.01

–270

–2

0.02

VS = ±15V –3 ±5V

–4

DIFFERENTIAL PHASE – Degrees

0.10

0

±2.5V –5

0

1

10

100 FREQUENCY – MHz

1000

Closed-Loop Gain and Phase vs. Frequency, G = +2, RL = 150, RF = 715 Ω

5

6

7

8

9

10

11

12

13

14

0 15

SUPPLY VOLTAGE – ± Volts

Differential Gain and Phase vs. Supply Voltage

REV. A 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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