Analog Devices AD8037-EB, AD8036AR-REEL7, AD8036AR-REEL, AD8036AR, AD8036AN Datasheet

–4 –3 –2 –1 0 1 2 3 4

4

3

2

1

0

–1

–2

–3

–4

INPUT VOLTAGE – Volts

OUTPUT VOLTAGE – Volts

VL = –3V

VL = –2V

VL = –1V

VH = 1V

VH = 2V

VH = 3V

AD8036

Low Distortion, Wide Bandwidth

a

Voltage Feedback Clamp Amps

AD8036/AD8037

FEATURES
Superb Clamping Characteristics

3 mV Clamp Error

1.5 ns Overdrive Recovery
Minimized Nonlinear Clamping Region
240 MHz Clamp Input Bandwidth
3.9 V Clamp Input Range

Wide Bandwidth AD8036 AD8037

Small Signal 240 MHz 270 MHz
Large Signal (4 V p-p) 195 MHz 190 MHz

Good DC Characteristics

2 mV Offset
10 V/C Drift

Ultralow Distortion, Low Noise

–72 dBc typ @ 20 MHz

4.5 nV/√Hz Input Voltage Noise

High Speed

Slew Rate 1500 V/s
Settling 10 ns to 0.1%, 16 ns to 0.01%

3 V to 5 V Supply Operation

APPLICATIONS
ADC Buffer
IF/RF Signal Processing
High Quality Imaging
Broadcast Video Systems
Video Amplifier
Full Wave Rectifier

large-signal bandwidths and ultralow distortion. The AD8036
achieves –66 dBc at 20 MHz, and 240 MHz small-signal and
195 MHz large-signal bandwidths. The AD8036 and AD8037’s
recover from 2× clamp overdrive within 1.5 ns. These character­istics position the AD8036/AD8037 ideally for driving as well as
buffering flash and high resolution ADCs.

In addition to traditional output clamp amplifier applications,
the input clamp architecture supports the clamp levels as addi­tional inputs to the amplifier. As such, in addition to static dc
clamp levels, signals with speeds up to 240 MHz can be applied
to the clamp pins. The clamp values can also be set to any value
within the output voltage range provided that V

. Due to these clamp characteristics, the AD8036 and AD8037

V

L

can be used in nontraditional applications such as a full-wave
rectifier, a pulse generator, or an amplitude modulator. These

PRODUCT DESCRIPTION

The AD8036 and AD8037 are wide bandwidth, low distortion
clamping amplifiers. The AD8036 is unity gain stable. The
AD8037 is stable at a gain of two or greater. These devices
allow the designer to specify a high (V

) and low (VCL) output

CH

clamp voltage. The output signal will clamp at these specified

novel applications are only examples of some of the diverse
applications which can be designed with input clamps.

The AD8036 is offered in chips, industrial (–40°C to +85°C)
and military (–55°C to +125°C) package temperature ranges
and the AD8037 in industrial. Industrial versions are available
in plastic DIP and SOIC; MIL versions are packaged in cerdip.

levels. Utilizing a unique patent pending CLAMPIN™ input
clamp architecture, the AD8036 and AD8037 offer a 10×
improvement in clamp performance compared to traditional
output clamping devices. In particular, clamp error is typically
3 mV or less and distortion in the clamp region is minimized.
This product can be used as a classical op amp or a clamp
amplifier where a high and low output voltage are specified.

The AD8036 and AD8037, which utilize a voltage feedback
architecture, meet the requirements of many applications which
previously depended on current feedback amplifiers. The AD8036
and AD8037 exhibit an exceptionally fast and accurate pulse
response (16 ns to 0.01%), extremely wide small-signal and

CLAMPIN is a trademark of Analog Devices, Inc.

FUNCTIONAL BLOCK DIAGRAM

8-Lead Plastic DIP (N), Cerdip (Q),

and SO Packages

AD8036/

NC

–INPUT

+INPUT

–V

1

2

3

4

S

NC = NO CONNECT

AD8037

(Top View)

8

7

6

5

V

H

+V

S

OUTPUT

V

L

H

is greater that

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.

Figure 1. Clamp DC Accuracy vs. Input Voltage

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

AD8036/AD8037–SPECIFICATIONS

(VS = 5 V; R

ELECTRICAL CHARACTERISTICS

Parameter Conditions Min Typ Max Min Typ Max Unit

DYNAMIC PERFORMANCE

Bandwidth (–3 dB)

Small Signal V
Large Signal

1

Bandwidth for 0.1 dB Flatness V

Slew Rate, Average +/– V
Rise/Fall Time V

Settling Time

To 0.1% V
To 0.01% V

HARMONIC/NOISE PERFORMANCE

2nd Harmonic Distortion 2 V p-p; 20 MHz, R

3rd Harmonic Distortion 2 V p-p; 20 MHz, R

3rd Order Intercept 25 MHz 46 41 dBm
Noise Figure R
Input Voltage Noise 1 MHz to 200 MHz 6.7 4.5 nV√Hz
Input Current Noise 1 MHz to 200 MHz 2.2 2.1 pA√Hz
Average Equivalent Integrated

Input Noise Voltage 0.1 MHz to 200 MHz 95 60 µV rms

Differential Gain Error (3.58 MHz) R
Differential Phase Error (3.58 MHz) R
Phase Nonlinearity DC to 100 MHz 1.1 1.1 Degree

CLAMP PERFORMANCE

Clamp Voltage Range

2

Clamp Accuracy 2× Overdrive, V

Clamp Nonlinearity Range
Clamp Input Bias Current (V

3

or VL) 8036, V

H

Clamp Input Bandwidth (–3 dB) V
Clamp Overshoot 2× Overdrive, V
Overdrive Recovery 2× Overdrive 1.5 1.3 ns

4,

DC PERFORMANCE

Input Offset Voltage

RL = 150 Ω

5

Offset Voltage Drift ±10 ± 10 µV/°C
Input Bias Current 410 39µA

Input Offset Current 0.3 3 0.1 3 µA

Common-Mode Rejection Ratio V
Open-Loop Gain V

INPUT CHARACTERISTICS

Input Resistance 500 500 kΩ
Input Capacitance 1.2 1.2 pF
Input Common-Mode Voltage Range ±2.5 ±2.5 V

OUTPUT CHARACTERISTICS

Output Voltage Range, R
Output Current 70 70 mA

= 150 Ω±3.2 ± 3.9 ±3.2 ±3.9 V

L

Output Resistance 0.3 0.3 Ω
Short Circuit Current 240 240 mA

POWER SUPPLY

Operating Range ±3.0 ±5.0 ±6.0 ±3.0 ± 5.0 ± 6.0 V
Quiescent Current 20.5 21.5 18.5 19.5 mA

Power Supply Rejection Ratio T

NOTES

1

See Max Ratings and Theory of Operation sections of data sheet.

2

See Max Ratings.

3

Nonlinearity is defined as the voltage delta between the set input clamp voltage (VH or VL) and the voltage at which V

4

Measured at AV = 50.

5

Measured with respect to the inverting input.

Specific

ations subject to change without notice.

OUT

8036, V

OUT

8036, R

OUT

OUT

V

OUT

OUT

OUT

R

L

R

L

S

L

L

VCH or V

T

MIN–TMAX

T

MIN–TMAX

CH

T

MIN–TMAX

T

MIN–TMAX

T

MIN–TMAX

CM

OUT

T

MIN–TMAX

T

MIN–TMAX

MIN–TMAX

otherwise noted)

≤ 0.4 V p-p 150 240 200 270 MHz

= 2.5 V p-p; 8037, V

OUT

≤ 0.4 V p-p

= 140 Ω; 8037, RF = 274 Ω 130 130 MHz

F

= 4 V Step, 10–90% 900 1200 1100 1500 V/µs
= 0.5 V Step, 10–90% 1.4 1.2 ns
= 4 V Step, 10–90% 2.6 2.2 ns

= 2 V Step 10 10 ns
= 2 V Step 16 16 ns

= 100 Ω –59 –52 –52 –45 dBc

= 500 Ω –66 –59 –72 –65 dBc

= 500 Ω –72 –65 –80 –73 dBc

= 50 Ω 18 14 dB

= 150 Ω 0.05 0.09 0.02 0.04 %
= 150 Ω 0.02 0.04 0.02 0.04 Degree

CL

H, L

or V

CL

= ±2 V 66 90 70 90 dB

= ±2.5 V 48 55 54 60 dB

L

= 100 Ω –68 –61 –70 –63 dBc

L

= +2 V, VCL = –2 V ±3 ± 10 ±3 ± 10 mV

CH

= ±1 V; 8037, V

= 2 V p-p 150 240 180 270 MHz

or VCL = 2 V p-p 1 5 1 5 %

CH

= 100 ; AV = +1 (AD8036); AV = +2 (AD8037), VH, VL open, unless

LOAD

AD8036A AD8037A

= 3.5 V p-p 160 195 160 190 MHz

OUT

±3.3 ±3.9 ± 3.3 ±3.9 V

±20 ±20 mV

100 100 mV

= ±0.5 V ±40 ± 60 ±50 ±70 µA

H, L

±80 ±90 µA

27 27mV

11 10 mV

15 15 µA

55µA

40 46 dB

25 24 mA

50 60 56 66

starts deviating from VIN (see Figure 73).

OUT

d

B

–2–

REV. B

AD8036/AD8037

WARNING!

ESD SENSITIVE DEVICE

ABSOLUTE MAXIMUM RATINGS

1

Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12.6 V

Voltage Swing × Bandwidth Product . . . . . . . . . . . 350 V-MHz

|V
|V
Internal Power Dissipation

| . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ≤ 6.3 V

H–VIN

| . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ≤ 6.3 V

L–VIN

2

Plastic DIP Package (N) . . . . . . . . . . . . . . . . . . . . 1.3 Watts

Small Outline Package (SO) . . . . . . . . . . . . . . . . . . 0.9 Watts

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

S

Differential Input Voltage . . . . . . . . . . . . . . . . . . . . . . . ± 1.2 V

Output Short Circuit Duration

. . . . . . . . . . . . . . . . . . . . . . Observe Power Derating Curves

Storage Temperature Range N, R . . . . . . . . .–65°C to +125°C

Operating Temperature Range (A Grade) . . . –40°C to +85°C

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

NOTES

1

Stresses above those listed under Absolute Maximum Ratings may cause perma­nent 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 DIP: θJA = 90°C/W
8-Lead SOIC: θJA = 155°C/W
8-Lead Cerdip: θJA = 110°C/W.

METALIZATION PHOTO

Dimensions shown in inches and (mm).

Connect Substrate to –VS.

–IN

2

V

8

+V

H

S

7

MAXIMUM POWER DISSIPATION

The maximum power that can be safely dissipated by these
devices 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 AD8036 and AD8037 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.

2.0

1.5

1.0

0.5

MAXIMUM POWER DISSIPATION – Watts

0

–50 80

–40

8-LEAD PLASTIC DIP

PACKAGE

8-LEAD SOIC

PACKAGE

010–10–20–30 20 30 40 50 60 70 90

AMBIENT TEMPERATURE – C

TJ = +150C

0.046
(1.17)

OUT

6

Figure 2. Plot of Maximum Power Dissipation vs.

Temperature

ORDERING GUIDE

45

3

+IN –V

S

0.050 (1.27)

–IN

2

8036

AD8036

V

L

V

H

87

+V

S

Model Range Description Option

AD8036AN –40°C to +85°C Plastic DIP N-8
AD8036AR –40°C to +85°C SOIC SO-8
AD8036AR-REEL –40°C to +85°C 13" Tape and Reel SO-8
AD8036AR-REEL7 –40°C to +85°C 7" Tape and Reel SO-8
AD8036ACHIPS –40°C to +85°CDie

Temperature Package Package

AD8036-EB Evaluation Board
5962-9559701MPA –55°C to +125°C Cerdip Q-8

0.046
(1.17)

OUT

6

AD8037AN –40°C to +85°C Plastic DIP N-8
AD8037AR –40°C to +85°C SOIC SO-8
AD8037AR-REEL –40°C to +85°C 13" Tape and Reel SO-8
AD8037AR-REEL7 –40°C to +85°C 7" Tape and Reel SO-8
AD8037ACHIPS –40°C to +85°CDie
AD8037-EB Evaluation Board

3

45

+IN –V

S

0.050 (1.27)

8037

AD8037

V

L

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 AD8036/AD8037 features 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.

REV. B

–3–

AD8036/AD8037

+V

S

RL = 100

–V

S

49.9

V

IN

R

F

130

V

OUT

0.1F

10F

AD8036

0.1F

10F

PULSE

GENERATOR

T

R/TF

= 350ps

+V

H

V

L

0.1F

0.1F

AD8036–Typical Characteristics

R

F

10F

S

0.1F

0.1F

10F

S

PULSE

GENERATOR

= 350ps

T

R/TF

V

IN

49.9

130

+V

AD8036

–V

V

RL = 100

OUT

TPC 1. Noninverting Configuration, G = +1

TPC 2. Large Signal Transient Response; VO = 4 V
p-p, G = +1, R

= 140

F

Ω

TPC 4. Noninverting Clamp Configuration, G = +1

TPC 5. Clamped Large Signal Transient Response (2
Overdrive); VO = 2 V p-p, G = +1, RF = 140 Ω, VH = +1 V,

= –1 V

V

L

×

TPC 3. Small Signal Transient Response; VO = 400 mV p-p,
G = +1, R

= 140

F

Ω

–4–

TPC 6. Clamped Small Signal Transient Response

×

Overdrive); VO = 400 mV p-p, G = +1, RF = 140 Ω,

(2

= +0.2 V, VL = –0.2 V

V

H

REV. B

AD8037–Typical Characteristics

R

F

PULSE

GENERATOR

= 350ps

T

R/TF

V

IN

49.9

R

IN

100

+V

AD8037

–V

TPC 7. Noninverting Configuration, G = +2

10F

S

0.1F

0.1F

10F

S

V

RL = 100

OUT

AD8036/AD8037

R

F

PULSE

GENERATOR

= 350ps

T

R/TF

V

IN

49.9

R

IN

0.1F

100

0.1F

+V

V

+V

H

AD8037

–V

L

TPC 10. Noninverting Clamp Configuration, G = +2

10F

S

0.1F

0.1F

10F

S

RL = 100

V

OUT

TPC 8. Large Signal Transient Response; VO = 4 V p-p,
G = +2, R

= RIN = 274

F

Ω

TPC 9. Small Signal Transient Response;
V

= 400 mV p-p, G = +2, RF = RIN = 274

O

Ω

TPC 11. Clamped Large Signal Transient Response
(2

×

Overdrive); VO = 2 V p-p, G = +2, RF = RIN = 274

Ω

, VH = +0.5 V, VL = –0.5 V

TPC 12. Clamped Small Signal Transient Response

×

Overdrive); VO = 400 mV p-p, G = +2, RF = R

(2

Ω

, VH = +0.1 V, VL = –0.1 V

274

IN

=

REV. B

–5–

AD8036/AD8037

g

AD8036–Typical Characteristics

2

200

140

GAIN – dB

1

0

1M

VO = 300mV p-p
V

= 5V

S

R

= 100

L

10M

102

49.9

FREQUENCY – Hz

100M 1G

–1

–2

–3

–4

–5

–6

–7

–8

TPC 13. AD8036 Small Signal Frequency Response,
G = +1

0.2

158

150

100M 1G

–0.1

–0.2

–0.3

GAIN – dB

–0.4

–0.5

–0.6

–0.7

–0.8

0.1

0

1M

VO = 300mV p-p
V

= 5V

S

R

= 100

L

10M

140

130

FREQUENCY – Hz

400

350

300

250

–3dB BANDWIDTH – MHz

200

20 24040 200 2201801601401201008060

VS = 5V

= 100

R

L

GAIN = +1

N PACKAGE

R PACKAGE

VALUE OF FEEDBACK RESISTOR (RF) – 

130

49.9

R

AD8036

F

R

L

TPC 16. AD8036 Small Signal –3 dB Bandwidth vs. R

2

OUTPUT – dB

–1

–2

–3

–4

–5

–6

–7

–8

1

0

1M

VS = 5V

= 2.5V

V

O

= 100

R

L

p-p

10M

50

RF = 50

TO

250

BY

50

FREQUENCY – Hz

250

100M 1G

F

TPC 14. AD8036 0.1 dB Flatness, N Package (for R

Ω

Package Add 20

90

80

70

60

50

40

30

20

OPEN -LOOP GAIN – dB

10

0

–10

–20

10k 100k 10M1M

to RF)

GAIN

FREQUENCY – Hz

PHASE

100M 1G

100

80

60

40

20

0

–20

–40

–60

–80

–100

–120

TPC 15. AD8036 Open-Loop Gain and Phase Margin vs.
Frequency, R

= 100

L

Ω

rees

PHASE MARGIN – De

TPC 17. AD8036 Large Signal Frequency Response,
G = +1

2

1

0

VS = 5V

GAIN – dB

–1

–2

–3

–4

–5

–6

–7

–8

100k

= 300mV

V

O

= 100

R

L

1V

p-p

140

AD8036

100

V

H

V

L (VIN

1M 10M

FREQUENCY – Hz

(VO)

)

100M 1G

TPC 18. AD8036 Clamp Input Bandwidth, VH, V

–6–

L

REV. B

AD8036/AD8037

–30

VO = 2V p-p

= 5V

V

S

= 500

R

L

G = +1

100k 100M10M1M10k

2ND HARMONIC

3RD HARMONIC

FREQUENCY – Hz

–110

HARMONIC DISTORTION – dBc

–130

–50

–70

–90

TPC 19. AD8036 Harmonic Distortion vs. Frequency,

= 500

HARMONIC DISTORTION – dBc

–110

–130

–30

–50

–70

–90

Ω

VO = 2V p-p
V

= 5V

S

= 100

R

L

G = +1

100k 100M10M1M10k

2ND HARMONIC

3RD HARMONIC

FREQUENCY – Hz

R

L

0.06

0.04

0.02

0.00

–0.02

DIFF GAIN – %

–0.04

–0.06

1st 2nd 3rd 4th 5th 6th 7th 8th 9th 10th 11th

0.04

0.02

0.00

–0.02

–0.04

DIFF PHASE – Degrees

1st 2nd 3rd 4th 5th 6th 7th 8th 9th 10th 11th

TPC 22. AD8036 Differential Gain and Phase Error,
G = +1, R

= 150 Ω, F = 3.58 MHz

L

0.05

0.04

0.03

0.02

0.01

0

–0.01

ERROR – %

–0.02

–0.03

–0.04

–0.05

0 5 10 15 20 25 30 35 40 45

SETTLING TIME – ns

TPC 20. AD8036 Harmonic Distortion vs. Frequency,
R

= 100

60

50

40

INTERCEPT – +dBm

30

20

10

Ω

20 40 8060

FREQUENCY – MHz

100

L

TPC 21. AD8036 Third Order Intercept vs. Frequency

TPC 23. AD8036 Short-Term Settling Time to 0.01%, 2 V

= 100

Step, G = +1, R

0.4

0.3

0.2

0.1

0

–0.1

–0.2

ERROR – %

–0.3

–0.4

–0.5

–0.6

L

Ω

0 2 4 6 8 10 12 14 16 18

SETTLING TIME - s

TPC 24. AD8036 Long-Term Settling Time, 2 V Step,
G = +1, R

= 100

L

Ω

REV. B

–7–