OBSOLETE

REV. 0

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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.

a

AD9624*

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 617/329-4700

Fax: 617/326-8703

CONNECTION DIAGRAM

1

2

3

4

8

7

6

5

AD9624

NC #

–INPUT

+INPUT

–V

S

NC #

+V

S

OUTPUT

NC

# OPTIONALCAPACITOR CB CONNECTED HERE

DECREASES SETTLING TIME (SEE TEXT).

FEATURES

300 MHz Small Signal Bandwidth

200 MHz Large Signal BW (4 V p-p)

High Slew Rate: 2200 V/ s

Low Distortion: –60 dB @ 20 MHz

Fast Settling: 15 ns to 0.01%

2.2 nV/

√Hz Spectral Noise Density

3 V Supply Operation

APPLICATIONS

ADC Input Driver

Differential Amplifiers

IF/RF Amplifiers

Pulse Amplifiers

Professional Video

DAC Current-to-Voltage

Baseband and Video Communications

Active Filters/lntegrators/Log Amps

Wideband Voltage

Feedback Amplifier

Parameter

AD9621

AD9622

AD9623

AD9624

Units

Minimum Stable Gain

+1

+2

+4

+6

V/V

Harmonic Distortion (20 MHz)

–52

–66

–64

–66

dB

Large Signal Bandwidth (4 V p-p)

130

160

190

200

MHz

SSBW (0.5 V p-p)

350

220

270

300

MHz

Slew Rate

1200

1500

2100

2200

V/

µs

Rise/Fall Time (0.5 V Step)

2.4

1.7

1.6

1.5

ns

Settling Time (to 0.1%/0.01%)

7/11

8/14

8/14

8/14

ns

Input Noise (0.1 MHz – 200 MHz)

80

49

36

32

µV rms

GENERAL DESCRIPTION

The AD9624 is one of a family of very high speed and wide

bandwidth amplifiers utilizing a voltage feedback architecture.

These amplifiers define a new level of performance for voltage

feedback amplifiers, especially in the categories of large signal

bandwidth, slew rate, settling, low distortion, and low noise.

Proprietary design architectures have resulted in an amplifier

family that combines the most attractive attributes of both cur-

rent feedback and voltage feedback amplifiers. The AD9624

exhibits extraordinarily accurate and fast pulse response charac-

teristics (8 ns settling to 0.1%) as well as extremely wide small

and large signal bandwidth previously found only in current

feedback amplifiers. When combined with balanced high imped-

ance inputs and low input noise current more common to volt-

age feedback architectures, the AD9624 offers performance not

previously available in a monolithic operational amplifier.

*Protected by U.S. Patent 5,150,074 and others pending.

Other members of the AD962X amplifier family are the

AD9621 (G = +1), AD9622 (G = +2), and the AD9623

(G = +4). A separate data sheet is available from Analog

Devices for each model. Each generic device has been designed

for a different minimum stable gain setting, allowing users flex-

ibility in optimizing system performance. Dynamic performance

specifications such as slew rate, settling time, and distortion vary

from model to model. The table below summarizes key perfor-

mance attributes for the AD962X family and can be used as a

selection guide.

The AD9624 is offered in industrial and military temperature

ranges. Industrial versions are available in plastic DIP, SOIC,

and cerdip; MIL versions are packaged in cerdips.

PRODUCT HIGHLIGHTS

1. Wide Large Signal Bandwidth

2. High Slew Rate

3. Fast Settling

4. Low Distortion

5. Output Short-Circuit Protected

6. Low Intermodulation Distortion of High Frequencies