AD811 Analog Devices, AD811 Datasheet

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AD811

Manufacturer Part Number
AD811
Description
High Performance Video Op Amp
Manufacturer
Analog Devices
Datasheet

Specifications of AD811

-3db Bandwidth
140MHz
Slew Rate
2.5kV/µs
Vos
500µV
Ib
2µA
# Opamps Per Pkg
1
Input Noise (nv/rthz)
1.9nV/rtHz
Vcc-vee
9V to 36V
Isy Per Amplifier
16mA
Packages
DIP,LCC,SOIC

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FEATURES
High speed
Excellent video performance (R
Low distortion: THD = −74 dB @ 10 MHz
Excellent dc precision: 3 mV max input offset voltage
Flexible operation
APPLICATIONS
Video crosspoint switchers, multimedia broadcast systems
HDTV compatible systems
Video line drivers, distribution amplifiers
ADC/DAC buffers
DC restoration circuits
Medical
GENERAL DESCRIPTION
A wideband current feedback operational amplifier, the AD811
is optimized for broadcast-quality video systems. The −3 dB
bandwidth of 120 MHz at a gain of +2 and the differential gain
and phase of 0.01% and 0.01° (R
an excellent choice for all video systems. The AD811 is designed
to meet a stringent 0.1 dB gain flatness specification to a band-
width of 35 MHz (G = +2) in addition to low differential gain
and phase errors. This performance is achieved whether driving
one or two back-terminated 75 Ω cables, with a low power
supply current of 16.5 mA. Furthermore, the AD811 is specified
over a power supply range of ±4.5 V to ±18 V.
(Continued on page 3)
Rev. E
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.
140 MHz bandwidth (3 dB, G = +1)
120 MHz bandwidth (3 dB, G = +2)
35 MHz bandwidth (0.1 dB, G = +2)
2500 V/µs slew rate
25 ns settling time to 0.1% (for a 2 V step)
65 ns settling time to 0.01% (for a 10 V step)
0.01% differential gain, 0.01° differential phase
Voltage noise of 1.9 nV/√ Hz
Specified for ±5 V and ±15 V operation
±2.3 V output swing into a 75 Ω load (V
Ultrasound
PET
Gamma
Counter applications
L
L
= 150 Ω) make the AD811
=150 Ω)
S
= ±5 V)
High Performance Video Op Amp
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.326.8703
Figure 1. 8-Lead Plastic (N-8), CERDIP (Q-8), SOIC (R-8)
CONNECTION DIAGRAMS
–V
+IN
–V
+IN
–IN
–IN
+IN
NC
NC
NC
NC
NC
Figure 3. 20-Terminal LCC (E-20A)
–IN
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
–V
–IN
+IN
NC
S
S
Figure 2. 16-Lead SOIC (R-16)
Figure 4. 20-Lead SOIC (R-20)
S
© 2004 Analog Devices, Inc. All rights reserved.
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NC = NO CONNECT
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NC = NO CONNECT
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NC = NO CONNECT
NC = NO CONNECT
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AD811
AD811
AD811
AD811
2
1
20 19
8
7
6
5
NC
+V
OUTPUT
NC
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S
NC
NC
+V
NC
OUTPUT
NC
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+V
NC
OUTPUT
NC
NC
NC
NC
NC
NC
+V
NC
OUTPUT
NC
NC
NC
S
S
S
www.analog.com
AD811

Related parts for AD811

AD811 Summary of contents

Page 1

... AD811 L an excellent choice for all video systems. The AD811 is designed to meet a stringent 0.1 dB gain flatness specification to a band- width of 35 MHz (G = +2) in addition to low differential gain and phase errors. This performance is achieved whether driving one or two back-terminated 75 Ω ...

Page 2

... AD811 TABLE OF CONTENTS Specifications..................................................................................... 4 Absolute Maximum Ratings............................................................ 6 Maximum Power Dissipation ..................................................... 6 Metalization Photograph............................................................. 6 Typical Performance Characteristics ............................................. 7 Applications..................................................................................... 12 General Design Considerations................................................ 12 REVISION HISTORY 7/04—Data Sheet Changed from Rev Rev. E Updated Format............................................................. Universal Change to Maximum Power Dissipation Section .................... 7 Changes to Ordering Guide ...................................................... 20 Updated Outline Dimensions ................................................... 20 Achieving the Flattest Gain Response at High Frequency ...

Page 3

... V/µs with a settling time of less than 0. step and 0.01 step. The AD811 is ideal as an ADC or DAC buffer in data acquisi- tion systems due to its low distortion MHz and its wide unity gain bandwidth. Because the AD811 is a current feedback amplifier, this bandwidth can be maintained over a wide range of gains ...

Page 4

... INPUT OFFSET VOLTAGE Offset Voltage Drift INPUT BIAS CURRENT −Input +Input TRANSRESISTANCE 1 The AD811JR is specified with ±5 V power supplies only, with operation up to ± See the Analog Devices military data sheet for 883B tested specifications. 3 FPBW = slew rate/(2 π PEAK 4 Output power level, tested at a closed-loop gain of two ...

Page 5

... Operating Range Quiescent Current TRANSISTOR COUNT 1 The AD811JR is specified with ±5 V power supplies only, with operation up to ± See the Analog Devices military data sheet for 883B tested specifications. 3 Useful operating range is defined as the output voltage at which linearity begins to degrade. ...

Page 6

... Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality. MAXIMUM POWER DISSIPATION The maximum power that can be safely dissipated by the AD811 is limited by the associated rise in junction temper- ature. For the plastic packages, the maximum safe junction temperature is 145°C. For the CERDIP and LCC packages, the = 90° maximum junction temperature is 175° ...

Page 7

... JUNCTION TEMPERATURE (°C) Figure 12. Quiescent Supply Current vs. Junction Temperature ± ±15V S –60 –40 – 100 JUNCTION TEMPERATURE (°C) Figure 13. Input Offset Voltage vs. Junction Temperature AD811 = 150 Ω 120 140 120 140 ...

Page 8

... AD811 250 200 V = ±15V S 150 V = ±5V S 100 50 –60 –40 – JUNCTION TEMPERATURE (°C) Figure 14. Short-Circuit Current vs. Junction Temperature ±5V S 0.1 0.01 10k 100k 1M FREQUENCY (Hz) Figure 15. Closed-Loop Output Resistance vs. Frequency 10 RISE TIME 8 6 OVERSHOOT 0.4 0.6 0.8 1.0 1.2 VALUE OF FEEDBACK RESISTOR [R Figure 16. Rise Time and Overshoot vs. Value of Feedback Resistor ...

Page 9

... SUPPLIES SECOND HARMONIC THIRD HARMONIC 1k 10k 100k 1M FREQUENCY (Hz) Figure 24. Harmonic Distortion vs. Frequency T MAX = –175°C J 20-LEAD LCC 8-LEAD CERDIP –60 –40 – 100 AMBIENT TEMPERATURE (°C) Figure 25. Maximum Power Dissipation vs. Temperature for Hermetic Packages AD811 100M 10M 120 140 ...

Page 10

... AD811 – AD811 HP8130 50Ω PULSE GENERATOR –V 0.1µF S Figure 26. Noninverting Amplifier Connection 1V 100 OUT 0% 1V Figure 27. Small Signal Pulse Response, Gain = +1 100mV 100 OUT 0% 1V Figure 28. Small Signal Pulse Response, Gain = +10 ...

Page 11

... Figure 35. Closed-Loop Gain vs. Frequency, Gain = − – 150Ω ± 442Ω FREQUENCY (MHz) Figure 36. Closed-Loop Gain vs. Frequency, Gain = −10 1V 20ns 100 10V Figure 37. Large Signal Pulse Response, Gain = −10 AD811 = ±15V = 590Ω 100 = ±15V = 511Ω 100 ...

Page 12

... AD811 APPLICATIONS GENERAL DESIGN CONSIDERATIONS The AD811 is a current feedback amplifier optimized for use in high performance video and data acquisition applications. Because it uses a current feedback architecture, its closed-loop −3 dB bandwidth is dependent on the magnitude of the feed- back resistor. The desired closed-loop gain and bandwidth are ...

Page 13

... V/µs is achievable when driv- ing the same 500 pF capacitor, as shown in Figure 41 1.5kΩ OUT Figure 41. Output Waveform of an AD811 Driving a 500 pF Load. 100 Rev Page GAIN = + ±15V S R VALUE SPECIFIED S IS FOR FLATTEST FREQUENCY RESPONSE ...

Page 14

... The closed-loop gain versus the frequency at different supply voltages is shown in Figure 43. Figure oscilloscope photograph of an AD811 line driver’s pulse response with ±15 V supplies. The differential gain and phase error versus the supply are plotted in Figure 45 and Figure 46, respectively. ...

Page 15

... AN 80 MHZ VOLTAGE-CONTROLLED AMPLIFIER CIRCUIT The voltage-controlled amplifier (VCA) circuit of Figure 48 shows the AD811 being used with the AD834, a 500 MHz, 4-quadrant multiplier. The AD834 multiplies the signal input by the dc control voltage The AD834 outputs are in G the form of differential currents from a pair of open collectors, ensuring that the full bandwidth of the multiplier (which exceeds 500 MHz) is available for certain applications ...

Page 16

... AD811 A VIDEO KEYER CIRCUIT By using two AD834 multipliers, an AD811, and source, a special form of a two-input VCA circuit called a video keyer can be assembled. Keying is the term used in reference to blend- ing two or more video sources under the control of a third signal or signals to create such special effects as dissolves and overlays ...

Page 17

... V at the X1 input. In this case, an arrangement is shown using dual supplies of ±5 V for both the AD834 and the AD811. Also, the overall gain is arranged to be unity at the load when it is driven from a reverse-terminated 75 Ω line. This means that the dual VCA has to operate at a maximum gain of +2, rather than + the VCA circuit of Figure 47 ...

Page 18

... AD811 OUTLINE DIMENSIONS 0.375 (9.53) 0.365 (9.27) 0.355 (9.02 0.295 (7.49) 0.285 (7.24) 0.275 (6.98 0.100 (2.54) BSC 0.015 0.180 (0.38) (4.57) MIN MAX 0.150 (3.81) SEATING 0.130 (3.30) PLANE 0.110 (2.79) 0.060 (1.52) 0.022 (0.56) 0.050 (1.27) 0.018 (0.46) 0.045 (1.14) 0.014 (0.36) COMPLIANT TO JEDEC STANDARDS MO-095AA 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 Figure 50 ...

Page 19

... Figure 55. 20-LeadStandard Small Outline Package [SOIC] Rev Page 13.00 (0.5118) 12.60 (0.4961) 11 7.60 (0.2992) 7.40 (0.2913) 10.65 (0.4193) 10 10.00 (0.3937) 2.65 (0.1043) 0.75 (0.0295) 2.35 (0.0925) 0.25 (0.0098) 8° 1.27 SEATING 0.51 (0.0201) 0° 0.33 (0.0130) (0.0500) PLANE 0.31 (0.0122) BSC 0.20 (0.0079) COMPLIANT TO JEDEC STANDARDS MS-013AC Wide Body (R-20) Dimensions shown in millimeters and (inches) AD811 × 45° 1.27 (0.0500) 0.40 (0.0157) ...

Page 20

... AD811AR-20-REEL −40°C to +85°C AD811JR 0°C to +70°C AD811JR-REEL 0°C to +70°C AD811JR-REEL7 0°C to +70°C 1 AD811JRZ 0°C to +70°C AD811SQ/883B −55°C to +125°C 5962-9313101MPA −55°C to +125°C AD811SE/883B −55°C to +125°C 5962-9313101M2A −55°C to +125°C AD811ACHIPS − ...

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