AD8056 Analog Devices, AD8056 Datasheet

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AD8056

Manufacturer Part Number
AD8056
Description
Low Cost, Dual, 300 MHz Voltage Feedback Amplifiers
Manufacturer
Analog Devices
Datasheet

Specifications of AD8056

-3db Bandwidth
300MHz
Slew Rate
1.4kV/µs
Vos
3mV
Ib
400nA
# Opamps Per Pkg
2
Input Noise (nv/rthz)
6nV/rtHz
Vcc-vee
8V to 12V
Isy Per Amplifier
6mA
Packages
DIP,SOIC,SOP

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FEATURES
Low cost single (AD8055) and dual (AD8056)
Easy-to-use voltage feedback architecture
High speed
Small packaging
Excellent video specifications (R
Low power, ±5 V supplies 5 mA typ/amplifier power
High output drive current: over 60 mA
APPLICATIONS
Imaging
Photodiode preamps
Video line drivers
Differential line drivers
Professional cameras
Video switchers
Special effects
A-to-D drivers
Active filters
GENERAL DESCRIPTION
The AD8055 (single) and AD8056 (dual) voltage feedback
amplifiers offer bandwidth and slew rate typically found in
current feedback amplifiers. Additionally, these amplifiers are
easy to use and available at a very low cost.
Despite their low cost, the AD8055 and AD8056 provide
excellent overall performance. For video applications, their
differential gain and phase error are 0.01% and 0.02° into a
150 Ω load and 0.02% and 0.1° while driving four video loads
(37.50 Ω).
Rev. J
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.
300 MHz, −3 dB bandwidth (G = +1)
1400 V/μs slew rate
20 ns settling to 0.1%
Low distortion: −72 dBc @ 10 MHz
Low noise: 6 nV/√Hz
Low dc errors: 5 mV max V
Gain flatness 0.1 dB to 40 MHz
0.01% differential gain error
0.02° differential phase error
Drives 4 video loads (37.5 V) with 0.02% differential
Gain and 0.1° differential phase
supply current
AD8055 available in 5-lead SOT-23
AD8056 available in 8-lead MSOP
OS
, 1.2 μA max I
L
= 150 Ω, G = +2)
B
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
Their 0.1 dB flatness out to 40 MHz, wide bandwidth out to
300 MHz, along with 1400 V/μs slew rate and 20 ns settling
time, make them useful for a variety of high speed applications.
The AD8055 and AD8056 require only 5 mA typ/amplifier of
supply current and operate on a dual ±5 V or a single +12 V
power supply, while capable of delivering over 60 mA of load
current. The AD8055 is available in a small 8-lead PDIP, an 8-lead
SOIC, and a 5-lead SOT-23, while the AD8056 is available in an
8-lead MSOP. These features make the AD8055/AD8056 ideal
for portable and battery-powered applications where size and
power are critical. These amplifiers in the R-8, N-8, and RM-8
packages are available in the extended temperature range of
−40°C to +125°C.
–V
–IN
+IN
NC
S
Voltage Feedback Amplifiers
1
2
3
4
–1
–2
–3
–4
–5
0.3M
5
4
3
2
1
0
Figure 1. N-8 and R-8
NC = NO CONNECT
V
AD8055
IN
50Ω
1M
CONNECTION DIAGRAMS
OUT1
–IN1
+IN1
–V
R
R
G
S
C
Figure 4. Frequency Response
Figure 3. N-8, R-8, and RM-8
G = +10
R
1
2
3
4
F
R
= 909Ω
©2006 Analog Devices, Inc. All rights reserved.
F
Low Cost, 300 MHz
G = +5
R
8
7
6
5
AD8056
F
FREQUENCY (Hz)
= 1000Ω
V
10M
NC
+V
V
NC
OUT
AD8055/AD8056
OUT
R
S
L
G = +1
R
R
F
C
V
= 0Ω
= 100Ω
OUT
–V
+IN
S
8
7
6
5
V
R
100M
OUT
L
1
2
3
+V
OUT
–IN2
+IN2
= 100Ω
Figure 2. RJ-5
S
= 100mV p-p
AD8055
G = +2
R
www.analog.com
F
= 402Ω
1G
5
4
+V
–IN
S

Related parts for AD8056

AD8056 Summary of contents

Page 1

... The AD8055 is available in a small 8-lead PDIP, an 8-lead SOIC, and a 5-lead SOT-23, while the AD8056 is available in an 8-lead MSOP. These features make the AD8055/AD8056 ideal for portable and battery-powered applications where size and power are critical ...

Page 2

... AD8055/AD8056 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 General Description ......................................................................... 1 Connection Diagrams...................................................................... 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 Absolute Maximum Ratings............................................................ 5 Maximum Power Dissipation ..................................................... 5 ESD Caution.................................................................................. 5 Typical Performance Characteristics ............................................. 6 Test Circuits..................................................................................... 11 REVISION HISTORY 2/06—Rev Rev. J Changes to Format .............................................................Universal Updated Outline Dimensions ....................................................... 15 Changes to Ordering Guide .......................................................... 16 2/04—Rev Rev. I Changes to Features ...

Page 3

... Bandwidth Bandwidth for 0.1 dB Flatness Slew Rate Settling Time to 0.1% Rise and Fall Time, 10% to 90% NOISE/HARMONIC PERFORMANCE Total Harmonic Distortion Crosstalk, Output-to-Output (AD8056) Input Voltage Noise Input Current Noise Differential Gain Error Differential Phase Error DC PERFORMANCE Input Offset Voltage Offset Drift ...

Page 4

... MIN AD8056 T to 125°C MIN T to 85°C MIN + −V = − −V = – − AD8055ART AD8055AR, AD8055AN, AD8056AR, AD8056AN, AD8056ARM Rev Page AD8055A/AD8056A Min Typ Max Unit ±4.0 ±5.0 ±6.0 V 5.4 6.5 mA 7 ...

Page 5

... Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality. MAXIMUM POWER DISSIPATION Ratings The maximum power that can be safely dissipated by the 13.2 V AD8055/AD8056 is limited by the associated rise in junction ±V S temperature. The maximum safe junction temperature for ±2.5 V plastic encapsulated devices is determined by the glass Observe Power transition temperature of the plastic, approximately 150° ...

Page 6

... AD8055/AD8056 TYPICAL PERFORMANCE CHARACTERISTICS 0V 20mV 5ns Figure 6. Small Step Response (See 0V 1V 5ns Figure 7. Large Step Response (See Figure 34) 0V 20mV 5ns Figure 8. Small Step Response −1 (See Figure 35) 0V Figure 34 ) Figure 9. Large Step Response −1 (See – ...

Page 7

... Rev Page AD8055/AD8056 1kΩ L SECOND THIRD 0.4 0.8 1.2 1.6 2.0 2.4 2.8 3.2 3 p-p) OUT Figure 15. Distortion vs MHz OUT 100Ω 0Ω F FALL TIME RISE TIME ...

Page 8

... AD8055/AD8056 0.7 V OUT 0.6 V OUT 0.5 R 0.4 0.3 0.2 0.1 0 –0.1 –0.2 –0.3 –0.4 –0 TIME (ns) Figure 18. Settling Time 100Ω 402Ω RISE TIME 3 2 FALL TIME 0.2 0.4 0.6 0.8 1 p-p) IN Figure 19. Rise Time and Fall Time vs ...

Page 9

... Rev Page AD8055/AD8056 100k 1M 10M 100M FREQUENCY (Hz) Figure 27. Phase vs. Frequency 1 BACK TERMINATED LOAD (150Ω 402Ω F 1ST 2ND 3RD 4TH 5TH 6TH 7TH 8TH 9TH 10TH 11TH IRE 1 BACK TERMINATED LOAD (150Ω) ...

Page 10

... AD8055/AD8056 5.0 4.5 4 1kΩ L 3.5 3.0 2 150Ω L 2.0 1.5 1.0 0.5 0 –55 –35 – TEMPERATURE (°C) Figure 30. Output Swing vs. Temperature 1000 100 10 6nV 100 1k 10k 100k FREQUENCY (Hz) Figure 31. Voltage Noise vs. Frequency V = ± 50Ω 105 125 1M 10M 50M Rev Page 100 ...

Page 11

... Figure 34 + 100 Ω L 4.7µF 0.01µF 0.001µF V OUT HP8130A 6 PULSE 100Ω GENERATOR T /T 4.7µ 0.01µF 0.001µF Rev Page AD8055/AD8056 402Ω 4.7µ 0.01µF 0.001µF V 402Ω 0.67ns AD8055 57Ω 4.7µF 0.01µF 0.001µ ...

Page 12

... This can be accomplished by using an inverting and a noninverting amplifier stage to create the complementary signals. The circuit shown in Figure 37 shows how an AD8056 can be used to make a single-ended-to-differential converter that offers some advantages over the architecture previously mentioned. Each op amp is configured for unity gain by the feedback resistors from the outputs to the inverting inputs. In addition, each output drives the opposite op amp with a gain of − ...

Page 13

... When driving a capacitive load, most op amps exhibit peaking in the frequency response just before the frequency rolls off. Figure 39 shows the responses for an AD8056 running at a gain of +2, with an 100 Ω load that is shunted by various values of capacitance. It can be seen that under these conditions the part is still stable with capacitive loads ...

Page 14

... AD8055/AD8056 OUTLINE DIMENSIONS 0.150 (3.81) 0.130 (3.30) 0.115 (2.92) 0.022 (0.56) 0.018 (0.46) 0.014 (0.36) 0.400 (10.16) 0.365 (9.27) 0.355 (9.02 0.280 (7.11) 0.250 (6.35) 1 0.240 (6.10) 4 PIN 1 0.100 (2.54) BSC 0.060 (1.52) 0.210 MAX (5.33) MAX 0.015 (0.38) 0.015 (0.38) MIN GAUGE PLANE SEATING PLANE 0.005 (0.13) MIN 0.070 (1.78) 0.060 (1.52) 0.045 (1.14) COMPLIANT TO JEDEC STANDARDS MS-001-BA CONTROLLING DIMENSIONS ARE IN INCHES; MILLIMETER DIMENSIONS (IN PARENTHESES) ARE ROUNDED-OFF INCH EQUIVALENTS FOR REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN ...

Page 15

... Figure 44. 8-Lead Mini Small Outline Package [MSOP] (RM-8) Dimensions shown in millimeters 2.90 BSC 5 4 2.80 BSC 1.60 BSC PIN 1 0.95 BSC 1.90 1.30 BSC 1.15 0.90 1.45 MAX 0.22 0.08 0.15 MAX 0.50 SEATING 0.30 PLANE COMPLIANT TO JEDEC STANDARDS MO-178-AA Figure 45. 5-Lead Small Outline Transistor Package [SOT-23] (RJ-5) Dimensions shown in millimeters Rev Page AD8055/AD8056 0.80 8° 0.60 0° 0.40 10° 5° 0.60 0° 0.45 0.30 ...

Page 16

... AD8056ARZ −40°C to +125°C 1 AD8056ARZ-REEL −40°C to +125°C 1 AD8056ARZ-REEL7 −40°C to +125°C AD8056ARM −40°C to +125°C AD8056ARM-REEL −40°C to +125°C AD8056ARM-REEL7 −40°C to +125°C 1 AD8056ARMZ −40°C to +125°C AD8056ARMZ-REEL 1 −40°C to +125°C 1 AD8056ARMZ-REEL7 − ...

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