AD8028ARMZ1 datasheet, PDF - EEWORLD Datasheet

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AD8028ARMZ1: DescriptionLow Distortion, High Speed Rail-to-Rail Input/Output Amplifiers; File Size699KB，25 Pages; ManufacturerADI; Websitehttps://www.analog.com

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Low Distortion, High Speed Rail-to-Rail Input/Output Amplifiers

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Low Distortion, High Speed

Rail-to-Rail Input/Output Amplifiers

AD8027/AD8028

FEATURES

High speed

190 MHz, –3 dB bandwidth (G = +1)

100 V/μs slew rate

Low distortion

120 dBc @ 1 MHz SFDR

80 dBc @ 5 MHz SFDR

Selectable input crossover threshold

Low noise

4.3 nV/√Hz

1.6 pA/√Hz

Low offset voltage: 900 μV max

Low power: 6.5 mA/amplifier supply current

Power-down mode

No phase reversal: V

> |V

| + 200 mV

Wide supply range: 2.7 V to 12 V

Small packaging: SOIC-8, SOT-23-6, MSOP-10

AD8027

SOIC-8

(R)

–IN

+IN

–V

S 4

CONNECTION DIAGRAMS

AD8027

SOT-23-6

(RT)

DISABLE/SELECT

OUT

+IN

OUT 1

–V

S 2

DISABLE/SELECT

–

NC = NO CONNECT

–IN

AD8028

SOIC-8

(R)

OUTA 1

–IN A

+IN A

–V

S 4

–

AD8028

MSOP-10

(RM)

OUTB

–IN B

+IN B

OUTA 1

–IN A

+IN A

–V

S 4

DISABLE/SELECT A

03327-B-001

–

OUTB

–IN B

+IN B

DISABLE/SELECT B

Figure 1. Connection Diagrams (Top View)

APPLICATIONS

Filters

ADC drivers

Level shifting

Buffering

Professional video

Low voltage instrumentation

With their wide supply voltage range (2.7 V to 12 V) and wide

bandwidth (190 MHz), the AD8027/AD8028 amplifiers are

designed to work in a variety of applications where speed and

performance are needed on low supply voltages. The high per-

formance of the AD8027/AD8028 is achieved with a quiescent

current of only 6.5 mA/amplifier typical. The AD8027/AD8028

have a shutdown mode that is controlled via the SELECT pin.

The AD8027/AD8028 are available in SOIC-8, MSOP-10, and

SOT-23-6 packages. They are rated to work over the industrial

temperature range of –40°C to +125°C.

–20

G = +1

FREQUENCY = 100kHz

= 1kΩ

GENERAL DESCRIPTION

The AD8027/AD8028

are high speed amplifiers with rail-to-

rail input and output that operate on low supply voltages and

are optimized for high performance and wide dynamic signal

range. The AD8027/AD8028 have low noise (4.3 nV/√Hz,

1.6 pA/√Hz) and low distortion (120 dBc at 1 MHz). In appli-

cations that use a fraction of, or the entire input dynamic range

and require low distortion, the AD8027/AD8028 are ideal

choices.

Many rail-to-rail input amplifiers have an input stage that

switches from one differential pair to another as the input signal

crosses a threshold voltage, which causes distortion. The

AD8027/AD8028 have a unique feature that allows the user to

select the input crossover threshold voltage through the

SELECT pin. This feature controls the voltage at which the

complementary transistor input pairs switch. The AD8027/

AD8028 also have intrinsically low crossover distortion.

–40

–60

= +3V

SFDR (dB)

= +5V

±5V

–80

–100

–120

–140

OUTPUT VOLTAGE (V p-p)

03327-A-063

Figure 2. SFDR vs. Output Amplitude

Protected by U.S. patent numbers 6,486,737B1; 6,518,842B1

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 that may result from its use.

Specifications subject to change without notice. No license is granted by implication

or otherwise under any patent or patent rights of Analog Devices. Trademarks and

registered trademarks are the property of their respective owners.

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

Tel: 781.329.4700

www.analog.com

Fax: 781.461.3113

AD8027/AD8028

TABLE OF CONTENTS

Specifications..................................................................................... 3

Absolute Maximum Ratings............................................................ 6

Maximum Power Dissipation ..................................................... 6

ESD Caution.................................................................................. 6

Typical Performance Characteristics ............................................. 8

Theory of Operation ...................................................................... 17

Input Stage................................................................................... 17

Crossover Selection .................................................................... 17

Output Stage................................................................................ 18

DC Errors .................................................................................... 18

Wideband Operation ..................................................................... 19

Circuit Considerations .............................................................. 19

Applications..................................................................................... 21

Using the SELECT Pin............................................................... 21

Driving a 16-Bit ADC................................................................ 21

Band-Pass Filter.......................................................................... 22

Design Tools and Technical Support ....................................... 22

Outline Dimensions ....................................................................... 23

Ordering Guide .......................................................................... 24

REVISION HISTORY

3/05—Rev. B to Rev. C

Updated Format..................................................................Universal

Change to Figure 1 ........................................................................... 1

10/03—Rev. A to Rev. B

Changes to Figure 1...........................................................................1

8/03—Rev. 0 to Rev. A

Addition of AD8028........................................................... Universal

Changes to GENERAL DESCRIPTION.........................................1

Changes to Figures 1, 3, 4, 8, 13, 15, 17 ......................... 1, 6, 7, 8, 9

Changes to Figures 58, 60........................................................ 18, 20

Changes to SPECIFICATIONS........................................................3

Updated OUTLINE DIMENSIONS .............................................22

Updated ORDERING GUIDE.......................................................23

3/03—Revision 0: Initial Version

Rev. C | Page 2 of 24

AD8028ARMZ1 Related Products

	AD8028ARMZ1	AD8027ARTZ	AD8027ARTZ-R21	AD8027ARZ1	AD8028ARZ1
Description	Low Distortion, High Speed Rail-to-Rail Input/Output Amplifiers	Low Distortion, High Speed Rail-to-Rail Input/Output Amplifiers	Low Distortion, High Speed Rail-to-Rail Input/Output Amplifiers	Low Distortion, High Speed Rail-to-Rail Input/Output Amplifiers	Low Distortion, High Speed Rail-to-Rail Input/Output Amplifiers

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