Low Power Video Op Amp with Disable

Data Sheet

AD810

Rev. B

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FEATURES

High speed

80 MHz typical −3 dB bandwidth (G = +1)

75 MHz typical −3 dB bandwidth (G = +2)

1000 V/µs typical slew rate

50 ns typical settling time to 0.1% (VOUT = 10 V step)

Ideal for video applications

30 MHz typical 0.1 dB bandwidth (G = +2, VS = ±15 V)

0.02% typical differential gain (VS = ±15 V)

0.04° typical differential phase (VS = ±15 V)

Low noise

2.9 nV/√Hz typical input voltage noise

13 pA/√Hz typical inverting input current noise

Low power

8.0 mA maximum supply current (quiescent)

2.1 mA typical supply current (power-down mode)

High performance disable function

Turn off time: 100 ns typical

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 typical output swing into a 150 Ω load (VS = ±5 V)

APPLICATIONS

Professional video cameras

Multimedia systems

NTSC-, PAL-, and SECAM-compatible systems

Video line drivers

ADC or DAC buffers

DC restoration circuits

CONNECTION DIAGRAM

OFFSET NULL 1

–IN

2

+IN

3

–VS 4

DISABLE

8

+VS

7

OUTPUT

6

OFSET NULL

5

AD810

Figure 1.

GENERAL 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 a 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

maximum. 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 (G = +1) −3 dB 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.