REV. B

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.

a

2.7 V, 800 A, 80 MHz

Rail-to-Rail I/O Amplifiers

CONNECTION DIAGRAMS

AD8031/AD8032

FEATURES

Low Power

Supply Current 800

A/Amplifier

Fully Specified at +2.7 V, +5 V and

5 V Supplies

High Speed and Fast Settling on +5 V

80 MHz –3 dB Bandwidth (G = +1)

30 V/ s Slew Rate

125 ns Settling Time to 0.1%

Rail-to-Rail Input and Output

No Phase Reversal with Input 0.5 V Beyond Supplies

Input CMVR Extends Beyond Rails by 200 mV

Output Swing to Within 20 mV of Either Rail

Low Distortion

Output Current: 15 mA

High Grade Option

APPLICATIONS

High-Speed Battery-Operated Systems

High Component Density Systems

Portable Test Instruments

A/D Buffer

Active Filters

High-Speed Set-and-Demand Amplifier

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

Tel: 781/329-4700

World Wide Web Site: http://www.analog.com

Fax: 781/326-8703

© Analog Devices, Inc., 1999

8-Lead Plastic DIP (N),

SOIC (R) and

SOIC (RM)

Packages

1

2

3

4

8

7

6

5

AD8032

OUT1

–IN1

+IN1

+IN2

–IN2

OUT2

8-Lead Plastic DIP (N)

and SOIC (R) Packages

1

2

3

4

8

7

6

5

AD8031

NC

–IN

+IN

NC = NO CONNECT

NC

OUT

NC

5-Lead Plastic Surface Mount Package

SOT-23-5 (RT-5)

+IN

AD8031

1

2

3

5

4

–IN

(Not to Scale)

GENERAL DESCRIPTION

The AD8031 (single) and AD8032 (dual) single supply voltage

feedback amplifiers feature high-speed performance with 80 MHz

of small signal bandwidth, 30 V/

µs slew rate and 125 ns settling

time. This performance is possible while consuming less than

4.0 mW of power from a single +5 V supply. These features

increase the operation time of high speed battery-powered

systems without compromising dynamic performance.

The products have true single supply capability with rail-to-rail

input and output characteristics and are specified for +2.7 V,

+5 V and

±5 V supplies. The input voltage range can extend to

500 mV beyond each rail. The output voltage swings to within

20 mV of each rail providing the maximum output dynamic range.

The AD8031/AD8032 also offer excellent signal quality for only

800

µA of supply current per amplifier; THD is –62 dBc with a

2 V p-p, 1 MHz output signal and –86 dBc for a 100 kHz, 4.6 V p-p

signal on +5 V supply. The low distortion and fast settling time

make them ideal as buffers to single supply, A-to-D converters.

Operating on supplies from +2.7 V to +12 V and dual supplies up to

±6 V, the AD8031/AD8032 are ideal for a wide range of applications,

from battery-operated systems with large bandwidth requirements

to high-speed systems where component density requires lower

power dissipation. The AD8031/AD8032 are available in 8-lead

plastic DIP and SOIC packages and will operate over the indus-

trial temperature range of –40

°C to +85°C. The AD8031A is also

available in the space-saving 5-lead SOT-23-5 package and the

AD8032A is available in AN 8-lead

µSOIC package.

2 s/Div

2 s/Div

+5V

1k

1.7pF

+2.5V

Circuit Diagram

Figure 1. Rail-to-Rail Performance at 100 kHz