Analog Devices AD8072, AD8073 Datasheet

Low Cost, Dual/Triple

a

FEATURES
Very Low Cost
Good Video Specifications (RL = 150 ⍀)
Gain Flatness of 0.1 dB to 10 MHz

0.05% Differential Gain Error

0.1ⴗ Differential Phase Error

Low Power

3.5 mA/Amplifier Supply Current
Operates on Single +5 V to +12 V Supply

High Speed

100 MHz, –3 dB Bandwidth (G = +2)
500 V/␮s Slew Rate
Fast Settling Time of 25 ns (0.1%)

Easy to Use

30 mA Output Current
Output Swing to 1.3 V of Rails on Single +5 V Supply

APPLICATIONS
Video Line Driver
Computer Video Plug-In Boards
RGB or S-Video Amplifier in Component Systems

PRODUCT DESCRIPTION

The AD8072 (dual) and AD8073 (triple) are low cost, current
feedback amplifiers intended for high volume, cost sensitive
applications. In addition to being low cost, these amplifiers
deliver solid video performance into a 150 Ω load while consuming
only 3.5 mA per amplifier of supply current. Furthermore, the
AD8073 is three amplifiers in a single 14-lead narrow-body
SOIC package. This makes it ideal for applications where small
size is essential. Each amplifier’s inputs and output are acces­sible providing added gain setting flexibility.

These devices provide 30 mA of output current per amplifier,
and are optimized for driving one back terminated video load
(150 Ω) each. These current feedback amplifiers feature gain
flatness of 0.1 dB to 10 MHz while offering differential gain and
phase error of 0.05% and 0.1°. This makes the AD8072 and
AD8073 ideal for business and consumer video electronics.

Both will operate from a single +5 V to +12 V power supply.
The outputs of each amplifier swing to within 1.3 volts of either
supply rail to accommodate video signals on a single +5 V supply.

The high bandwidth of 100 MHz, 500 V/µs of slew rate, along
with settling to 0.1% in 25 ns, make the AD8072 and AD8073
useful in many general purpose, high speed applications where a
single +5 V or dual power supplies up to ±6 V are needed. The
AD8072 is available in 8-lead plastic DIP, SOIC, and µSOIC
packages while the AD8073 is available in 14-lead plastic DIP and
SOIC packages. Both operate over the commercial temperature
range of 0°C to +70°C. Additionally, the AD8072ARM oper­ates over the industrial temperature range of –40°C to +85°C.

Video Amplifiers

AD8072/AD8073

FUNCTIONAL BLOCK DIAGRAMS

8-Lead Plastic (N), SOIC (R), and ␮SOIC (RM) Packages

OUT1

1

–IN1

2

ⴙIN1

3

–V

4

S

AD8072

14-Lead Plastic (N), and SOIC (R) Packages

NC

1

NC

2

NC

3

ⴙV

S

ⴙIN1

–IN1

OUT1

6.1

6.0

5.9

5.8

5.7
VS = ⴞ5V

= 2V p-p

V

O

5.6

RF = RG = 1k⍀
RL = 150⍀

GAIN FLATNESS – dB

5.5

5.4

5.3

= ⴙ2

A

V

0.1 5001 10 100

AD8073

4

AD8072

5

6

7

NC = NO CONNECT

0.1 dB

DIV

FREQUENCY – MHz

Figure 1. Large Signal Frequency Response

ⴙV

8

S

OUT2

7

–IN2

6

ⴙIN2

5

OUT2

14

–IN2

13

ⴙIN2

12

–V

11

S

ⴙIN3

10

–IN3

9

OUT3

8

7

6

5

4

3

1 dB

DIV

2

1

CLOSED-LOOP GAIN – dB

0

–1

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: [phone] World Wide Web Site: http://www.analog.com
Fax: [phone] © Analog Devices, Inc., 2000

AD8072/AD8073–SPECIFICATIONS

ELECTRICAL CHARACTERISTICS

(@ TA = +25ⴗC, VS = ⴞ5 V, RL = 150 ⍀, unless otherwise noted)

AD8072/AD8073

Parameter Conditions Min Typ Max Units

DYNAMIC PERFORMANCE R

= 1 kΩ

F

–3 dB Bandwidth, Small Signal No Peaking, G = +2 80 100 MHz

0.1 dB Bandwidth, Small Signal No Peaking, G = +2 8 10 MHz
Slew Rate V

= 4 V Step 500 V/µs

O

Settling Time to 0.1% VO = 2 V Step 25 ns

DISTORTION/NOISE PERFORMANCE R

= 1 kΩ

F

Differential Gain f = 3.58 MHz, G = +2 0.05 0.15 %
Differential Phase f = 3.58 MHz, G = +2 0.1 0.3 Degrees
Crosstalk f = 5 MHz 60 dB
Input Voltage Noise f = 10 kHz 3 nV/√Hz
Input Current Noise f = 10 kHz (±IIN) 6 pA/√Hz

DC PERFORMANCE

Transimpedance 0.3 MΩ
Input Offset Voltage 2 6 mV

T

MIN

to T

MAX

8mV

Offset Drift 11 µV/°C
Input Bias Current (±)412µA
Input Bias Current Drift (±)12nA/°C

INPUT CHARACTERISTICS

–Input Resistance 120 Ω
+Input Resistance 1 MΩ
Input Capacitance 1.6 pF
Common-Mode Rejection Ratio V

= –3.8 V to +3.8 V 56 dB

CM

Input Common-Mode Voltage Range ±3.8 V

OUTPUT CHARACTERISTICS

+Output Voltage Swing 3 3.3 V
–Output Voltage Swing 2.25 3 V
Output Current R

= 10 Ω 30 mA

L

Short Circuit Current 80 mA

POWER SUPPLY

Operating Range ±2.5 to ± 6V
Power Supply Rejection Ratio V

= ±4 V to ±6 V 70 dB

S

Quiescent Current per Amplifier 3.5 5 mA

OPERATING TEMPERATURE RANGE 0 +70 °C

Specifications subject to change without notice.

–2–

REV. A

AD8072/AD8073

ELECTRICAL CHARACTERISTICS

(@ TA = +25ⴗC, VS = +5 V, RL = 150 ⍀ to 2.5 V, unless otherwise noted)

AD8072/AD8073

Parameter Conditions Min Typ Max Units

DYNAMIC PERFORMANCE R

= 1 kΩ

F

–3 dB Bandwidth, Small Signal No Peaking, G = +2 78 100 MHz

0.1 dB Bandwidth, Small Signal No Peaking, G = +2 7.8 10 MHz
Slew Rate V

= 2 V Step 350 V/µs

O

Settling Time to 0.1% VO = 2 V Step 25 ns

DISTORTION/NOISE PERFORMANCE R

Differential Gain f = 3.58 MHz, G = +2, R
Differential Phase f = 3.58 MHz, G = +2, R

= 1 kΩ

F

to 1.5 V 0.1 %

L

to 1.5 V 0.1 Degrees

L

Crosstalk f = 5 MHz 60 dB
Input Voltage Noise f = 10 kHz 3 nV/√Hz
Input Current Noise f = 10 kHz (±IIN) 6 pA/√Hz

DC PERFORMANCE

Transimpedance 0.25 MΩ
Input Offset Voltage 1.5 4 mV

T

MIN

to T

MAX

6mV

Offset Drift 9 µV/°C
Input Bias Current (±) 310µA
Input Bias Current Drift (±)10nA/°C

INPUT CHARACTERISTICS

–Input Resistance 120 Ω
+Input Resistance 1MΩ
Input Capacitance 1.6 pF
Common-Mode Rejection Ratio V

= +1.2 V to +3.8 V 54 dB

CM

Input Common-Mode Voltage Range +1.2 to +3.8 V

OUTPUT CHARACTERISTICS

Output Voltage Swing +1.5 to +3.5 +1.3 to +3.7 V
Output Current R

= 10 Ω 20 mA

L

Short Circuit Current 60 mA

POWER SUPPLY

Operating Range ±2.5 to ± 6V
Power Supply Rejection Ratio V

= +4 V to +6 V 64 dB

S

Quiescent Current per Amplifier 3 4.5 mA

OPERATING TEMPERATURE RANGE 0 +70 °C

REV. A

–3–

AD8072/AD8073

ABSOLUTE MAXIMUM RATINGS

Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13.2 V

Internal Power Dissipation

2

1

AD8072 8-Lead Plastic (N) . . . . . . . . . . . . . . . . . 1.3 Watts

AD8072 8-Lead Small Outline (SO-8) . . . . . . . . . 0.9 Watts

AD8072 8-Lead µSOIC (RM) . . . . . . . . . . . . . . . 0.6 Watts

AD8073 14-Lead Plastic (N) . . . . . . . . . . . . . . . . 1.6 Watts

AD8073 14-Lead Small Outline (R) . . . . . . . . . . . 1.0 Watts

Input Voltage (Common Mode) . . . . . . . . . . . . . . . . . . . .±V

S

Differential Input Voltage . . . . . . . . . . . . . . . . . . . . . ± 1.25 V

Output Short Circuit Duration . . . . . . . . . . . . . . . . . . . . . . . .

Observe Power Derating Curves
Storage Temperature Range

N, R, RM Packages . . . . . . . . . . . . . . . . . –65°C to +125°C

Lead Temperature Range (Soldering 10 sec) . . . . . . . . +300°C

NOTES

1

Stresses above those listed under Absolute Maximum Ratings may cause perma-

nent damage to the device. This is a stress rating only; functional operation of the
device at these or any other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect device reliability.

2

Specification is for device in free air:

8-Lead Plastic Package: θJA = 90°C/W
8-Lead SOIC Package: θJA = 140°C/W
8-Lead µSOIC Package: θJA = 214°C/W
14-Lead Plastic Package: θJA = 75°C/W
14-Lead SOIC Package: θJA = 120°C/W

ORDERING GUIDE

Model Range Description Option

AD8072ARM –40°C to +85°C 8-Lead µSOIC RM-8
AD8072ARM-REEL –40°C to +85°C 13" Reel 8-Lead µSOIC RM-8
AD8072ARM-REEL7 –40°C to +85°C 7" Reel 8-Lead µSOIC RM-8
AD8072JN 0°C to +70°C 8-Lead Plastic DIP N-8
AD8072JR 0°C to +70°C 8-Lead SOIC SO-8
AD8072JR-REEL 0°C to +70°C 13" Reel 8-Lead SOIC SO-8
AD8072JR-REEL7 0°C to +70°C 7" Reel 8-Lead SOIC SO-8
AD8073JN 0°C to +70°C 14-Lead Plastic DIP N-14
AD8073JR 0°C to +70°C 14-Lead Narrow SOIC R-14
AD8073JR-REEL 0°C to +70°C 13" Reel 14-Lead SOIC R-14
AD8073JR-REEL7 0°C to +70°C 7" Reel 14-Lead SOIC R-14

Temperature Package Package

MAXIMUM POWER DISSIPATION

The maximum power that can be safely dissipated by the
AD8072 and AD8073 is limited by the associated rise in junc­tion temperature. The maximum safe junction temperature for
plastic encapsulated devices is determined by the glass transition
temperature of the plastic, approximately +150°C. Exceeding
this limit temporarily may cause a shift in parametric perfor­mance due to a change in the stresses exerted on the die by the
package. Exceeding a junction temperature of +175°C for an
extended period can result in device failure.

While the AD8072 and AD8073 are internally short circuit pro­tected, this may not be sufficient to guarantee that the maximum
junction temperature (+150°C) is not exceeded under all condi­tions. To ensure proper operation, it is necessary to observe the
maximum power derating curves shown in Figures 2 and 3.

2.0

8-LEAD MINI-DIP PACKAGE

1.5

8-LEAD SOIC PACKAGE

1.0

0.5

MAXIMUM POWER DISSIPATION – Watts

0
–50 90–40 –30 –20 –10 0 1020 30 5060 708040

␮SOIC

AMBIENT TEMPERATURE – ⴗC

TJ = ⴙ150ⴗC

Figure 2. AD8072 Maximum Power Dissipation vs.
Temperature

2.5

TJ = ⴙ150ⴗC

2.0

14-LEAD DIP PACKAGE

1.5

14-LEAD SOIC

1.0

MAXIMUM POWER DISSIPATION – Watts

0.5

–50 90–40

–30 –20 –100 1020 304050 60 80

AMBIENT TEMPERATURE – ⴗC

Figure 3. AD8073 Maximum Power Dissipation vs.
Temperature

CAUTION

ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily
accumulate on the human body and test equipment and can discharge without detection.
Although the AD8072 and AD8073 feature proprietary ESD protection circuitry, permanent
damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper
ESD precautions are recommended to avoid performance degradation or loss of functionality.

–4–

70

WARNING!

ESD SENSITIVE DEVICE

REV. A