AD8138AARMZ Analog Devices Inc, AD8138AARMZ Datasheet
AD8138AARMZ
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AD8138AARMZ Summary of contents
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FEATURES Easy to use, single-ended-to-differential conversion Adjustable output common-mode voltage Externally adjustable gain Low harmonic distortion −94 dBc SFDR @ 5 MHz −85 dBc SFDR @ 20 MHz −3 dB bandwidth of 320 MHz Fast settling to ...
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AD8138 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 Pin Configuration............................................................................. 1 Typical Application Circuit ............................................................. 1 General Description ......................................................................... 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 ±D to ±OUT Specifications...................................................... ±OUT Specifications ..................................................... 4 OCM ...
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SPECIFICATIONS ±D to ±OUT SPECIFICATIONS IN At 25° ± + OCM specifications refer to single-ended input and differential outputs, unless otherwise noted. Table 1. Parameter DYNAMIC PERFORMANCE −3 dB Small ...
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AD8138 V to ±OUT SPECIFICATIONS OCM At 25° ± + OCM specifications refer to single-ended input and differential outputs, unless otherwise noted. Table 2. Parameter DYNAMIC PERFORMANCE −3 dB Bandwidth ...
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SPECIFICATIONS IN At 25° OCM specifications refer to single-ended input and differential output, unless otherwise noted. Table 3. Parameter DYNAMIC PERFORMANCE −3 dB Small ...
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AD8138 V TO ±OUT SPECIFICATIONS OCM At 25° OCM specifications refer to single-ended input and differential output, unless otherwise noted. Table 4. Parameter DYNAMIC PERFORMANCE −3 dB ...
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ABSOLUTE MAXIMUM RATINGS Table 5. Parameter Supply Voltage V OCM Internal Power Dissipation Operating Temperature Range Storage Temperature Range Lead Temperature (Soldering 10 sec) Junction Temperature Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the ...
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AD8138 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Table 7. Pin Function Descriptions Pin No. Mnemonic Description 1 −IN Negative Input Summing Node Voltage applied to this pin sets the common-mode output voltage with a ratio of 1:1. For example, ...
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TYPICAL PERFORMANCE CHARACTERISTICS Unless otherwise noted, Gain = ±5V S –3 –6 – FREQUENCY (MHz) Figure 5. Small Signal Frequency Response ...
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AD8138 – p-p OUT 800Ω L –60 –70 HD2 (V = +5V) S –80 HD2 (V S –90 –100 HD3 (V = +5V) S –110 HD3 (V = ±5V) S –120 ...
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p-p OUT, dm –70 HD2 (F = 20MHz) –80 HD3 (F = 20MHz) –90 HD2 (F = 5MHz) –100 HD3 (F = 5MHz) –110 200 600 1000 1400 R (Ω) LOAD Figure ...
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AD8138 V = ± +5V S 400mV Figure 23. Large Signal Transient Response C = 0pF 1pF F 400mV Figure 24. Large Signal Transient Response 200µV V OUT +DIN 1V Figure 25. ...
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p-p IN –30 – ±5V S –50 – +5V S – 100 FREQUENCY (MHz) Figure 29. Output Balance Error vs. Frequency (See Figure 41) –10 ΔV /ΔV OUT ...
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AD8138 + ± –3 –6 – FREQUENCY (MHz) Figure 35. V Frequency Response OCM V = ± –1V TO +1V OCM 400mV Figure 36. V Transient ...
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TEST CIRCUITS R = 499Ω 499Ω G 49.9Ω AD8138 R = 499Ω G 24.9Ω 499Ω F Figure 39. Basic Test Circuit 499Ω 499Ω 24.9Ω 49.9Ω AD8138 24.9Ω 499Ω 24.9Ω 499Ω Figure 40. Test Circuit for ...
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AD8138 OPERATIONAL DESCRIPTION DEFINITION OF TERMS +IN –OUT + AD8138 OCM –D IN –IN +OUT Figure 42. Circuit Definitions Differential voltage refers to the difference between ...
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THEORY OF OPERATION The AD8138 differs from conventional op amps in that it has two outputs whose voltages move in opposite directions. Like an op amp, it relies on high open-loop gain and negative feedback to force these outputs to ...
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AD8138 When using the AD8138 in gain configurations where one feedback network is unequal the other network, there is a differential output noise due to input-referred voltage in the ...
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LAYOUT, GROUNDING, AND BYPASSING As a high speed part, the AD8138 is sensitive to the PCB environment in which it has to operate. Realizing its superior specifications requires attention to various details of good high speed PCB design. The first ...
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AD8138 BALANCED TRANSFORMER DRIVER Transformers are among the oldest devices used to perform a single-ended-to-differential conversion (and vice versa). Trans- formers can also perform the additional functions of galvanic isolation, step-up or step-down of voltages, and impedance transformation. For these ...
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HIGH PERFORMANCE ADC DRIVING The circuit in Figure 46 shows a simplified front-end connection for an AD8138 driving an AD9224, a 12-bit, 40 MSPS ADC. The ADC works best when driven differentially, which minimizes its distortion. The AD8138 eliminates the ...
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AD8138 3 V OPERATION The circuit in Figure 47 shows a simplified front-end connection for an AD8138 driving an AD9203, a 10-bit, 40 MSPS ADC that is specified to work on a single 3 V supply. The ADC works best ...
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OUTLINE DIMENSIONS 5.00 (0.1968) 4.80 (0.1890 6.20 (0.2440) 4.00 (0.1574) 5.80 (0.2284) 3.80 (0.1497 1.27 (0.0500) BSC 1.75 (0.0688) 1.35 (0.0532) 0.25 (0.0098) 0.10 (0.0040) 0.51 (0.0201) COPLANARITY 0.25 (0.0098) 0.31 (0.0122) SEATING 0.10 0.17 (0.0067) ...
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AD8138 NOTES ©2006 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. C01073-0-1/06(F) Rev Page ...