AD8021AR-REEL7 Analog Devices Inc, AD8021AR-REEL7 Datasheet
AD8021AR-REEL7
Specifications of AD8021AR-REEL7
Related parts for AD8021AR-REEL7
AD8021AR-REEL7 Summary of contents
Page 1
FEATURES Low noise 2.1 nV/√Hz input voltage noise 2.1 pA/√Hz input current noise Custom compensation Constant bandwidth from G = − −10 High speed 200 MHz (G = −1) 190 MHz (G = −10) Low power 34 ...
Page 2
AD8021 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 General Description ......................................................................... 1 Connection Diagram ....................................................................... 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 Absolute Maximum Ratings............................................................ 7 Maximum Power Dissipation ..................................................... 7 ESD Caution.................................................................................. 7 Pin Configuration and Function Descriptions............................. ...
Page 3
... p-p MHz 50% logic to 50% output 50% logic to 50% output O V − V DISABLE LOGIC REFERENCE LOGIC REFERENCE = 0.4 V DISABLE = 4.0 V Rev Page AD8021 AD8021AR/AD8021ARM Min Typ Max Unit 355 490 MHz 160 205 MHz 150 185 MHz 110 150 MHz 95 120 V/μs ...
Page 4
... V = ± Rev Page AD8021AR/AD8021ARM Min Typ Max 30 33 ±2.25 ±5 ±12.0 7.0 7.7 1.3 1.6 −86 −95 −86 −95 AD8021AR/AD8021ARM Min Typ Max 520 560 175 220 170 200 125 165 105 130 140 170 265 340 400 460 21 90 − ...
Page 5
... AD8021AR/AD8021ARM Min Typ Max 270 305 155 190 135 165 95 130 80 110 110 140 210 280 290 390 28 40 −84 −91 −68 − ...
Page 6
... V DISABLE LOGIC REFERENCE LOGIC REFERENCE = 0.4 V DISABLE = 4.0 V LOGIC REFERENCE = 0.4 V DISABLE = 0.4 V Output enabled Output disabled −0 +0 Rev Page AD8021AR/AD8021ARM Min Typ Max Unit 0.4 1.0 mV 0.8 μV/°C 7.5 10.3 μA 10 nA/°C 0.1 0.5 ±μ ...
Page 7
ABSOLUTE MAXIMUM RATINGS Table 4. Parameter Supply Voltage Power Dissipation Input Voltage (Common Mode) Differential Input Voltage 1 Differential Input Current Output Short-Circuit Duration Storage Temperature Range Operating Temperature Range Lead Temperature (Soldering, 10 sec) 1 The AD8021 inputs are ...
Page 8
AD8021 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Table 5. Pin Function Descriptions Pin No. Mnemonic 1 LOGIC REFERENCE 2 −IN 3 +IN 4 − COMP 6 V OUT DISABLE 1 When Pin 8 ( ...
Page 9
TYPICAL PERFORMANCE CHARACTERISTICS T = 25° ± kΩ + frequency = 1 MHz, unless otherwise noted +10 1kΩ 110Ω ...
Page 10
AD8021 100Ω 0.1M 1M 10M FREQUENCY (Hz) Figure 11. Large Signal Frequency Response vs. Frequency and Load, Noninverting (See Figure 49 ...
Page 11
6.2 6 ±5V S 5.8 5.6 5.4 1M 10M FREQUENCY (Hz) Figure 17. 0.1 dB Flatness vs. Frequency and Supply 150 Ω, Noninverting (See Figure 49) L –20 –30 –40 –50 ...
Page 12
AD8021 –50 –60 SECOND – 5MHz C –80 THIRD –90 SECOND f = 1MHz –100 C –110 THIRD –120 p-p) OUT Figure 23. Second and Third Harmonic Distortion vs. V Fundamental Frequency (f ...
Page 13
p 2 1kΩ L 1.0 –1.0 –2 120 TIME (ns) Figure 29. Large Signal Transient Response vs. R (See Figure 49 p ...
Page 14
AD8021 100 PULSE WIDTH = 120ns 20 0 –20 PULSE WIDTH = 300µs –40 5V –60 0V – –100 TIME (µs) Figure 35. Long-Term Settling ...
Page 15
FREQUENCY (Hz) Figure 41. CMRR vs. Frequency (See Figure 51) 300 100 0.3 0.1 0.03 0.01 0.003 10k 100k 1M 10M ...
Page 16
AD8021 8.5 8.0 7.5 7.0 6.5 6.0 5.5 –50 – TEMPERATURE (°C) Figure 47. Quiescent Supply Current vs. Temperature 50 75 100 Rev Page ...
Page 17
TEST CIRCUITS +V S 50Ω CABLE R S 50Ω 49.9Ω – Figure 48. Noninverting Gain 50Ω CABLE R S 50Ω 49.9Ω – Figure 49. ...
Page 18
AD8021 BIAS HP8753D BNC NETWORK ANALYZER 50Ω 49.9Ω 249Ω –V S 7pF 499Ω 499Ω Figure 56. Positive PSRR 50Ω 50Ω CABLE 976Ω 53.6Ω Rev Page BIAS HP8753D ...
Page 19
APPLICATIONS The typical voltage feedback op amp is frequency stabilized with a fixed internal capacitor, C INTERNAL compensation first-order approximation, voltage feedback op amps have a fixed gain bandwidth product. For example, if its −3 dB bandwidth is ...
Page 20
AD8021 kΩ 49.9 Ω (see Figure 49 Table 6. Recommended Component Values Noise Gain (Noninverting Gain) R (Ω) R (Ω ...
Page 21
THEORY OF OPERATION The AD8021 is fabricated on the second generation of Analog Devices proprietary High Voltage eXtra-Fast Complementary Bipolar (XFCB) process, which enables the construction of PNP and NPN transistors with similar the 3 GHz region. ...
Page 22
AD8021 DRIVING 16-BIT ADCs Low noise and adjustable compensation make the AD8021 especially suitable as a buffer/driver for high resolution ADCs. As seen in Figure 19, the harmonic distortion is better than 90 dBc at frequencies between 100 kHz and ...
Page 23
G = – –3 –6 –9 –12 –15 –18 100k 1M 10M FREQUENCY (Hz) Figure 66. AC Response of Two Identically Compensated High Speed Op Amps Configured for a Gain of +2 ...
Page 24
AD8021 18 FET + OBE 16 R SNUB 5 49.9 Ω 14 49.9 Ω 33pF L 1k Ω 12 – 499 Ω 499 Ω 8pF; C ...
Page 25
... OUTLINE DIMENSIONS ORDERING GUIDE Model Temperature Range AD8021AR −40°C to +85°C AD8021AR-REEL −40°C to +85°C AD8021AR-REEL7 −40°C to +85°C 1 AD8021ARZ −40°C to +85°C 1 AD8021ARZ-REEL −40°C to +85°C 1 AD8021ARZ-REEL7 −40°C to +85°C AD8021ARM −40°C to +85°C AD8021ARM-REEL − ...
Page 26
AD8021 NOTES Rev Page ...
Page 27
NOTES Rev Page AD8021 ...
Page 28
AD8021 NOTES ©2006 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. C01888-0-5/06(F) Rev Page ...