ADA4937-1 Analog Devices, ADA4937-1 Datasheet
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ADA4937-1
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ADA4937-1 Summary of contents
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... ADA4937-1 make it well suited for a wide variety of data acquisition and signal processing applications. The ADA4937-1 is available in a Pb-free × 16-lead LFCSP. The pinout has been optimized to facilitate PCB layout and minimize distortion. The part is specified to operate over the − ...
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... ADA4937-1 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 Functional Block Diagram .............................................................. 1 General Description ......................................................................... 1 Revision History ............................................................................... 2 Specifications..................................................................................... Operation ............................................................................... 3 3.3 V Operation ............................................................................ 5 Absolute Maximum Ratings............................................................ 7 Thermal Resistance ...................................................................... 7 ESD Caution.................................................................................. 7 Pin Configuration and Function Descriptions............................. 8 Typical Performance Characteristics ............................................. 9 Test Circuits..................................................................................... 16 Operational Description................................................................ 17 Definition of Terms.................................................................... 17 REVISION HISTORY 5/07—Revision 0: Initial Version Theory of Operation ...
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... kΩ 0 >100 −61 ADA4937-1 Max Unit MHz MHz MHz V/μs ns dBc dBc dBc dBc dBc dBc dBc nV/√Hz pA/√Hz dB +2.5 mV μV/°C −10 μA μA/°C +2 μA MΩ ...
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... ADA4937-1 Table ±OUT Performance OCM Parameter V DYNAMIC PERFORMANCE OCM −3 dB Bandwidth Slew Rate Input Voltage Noise (RTI) V INPUT CHARACTERISTICS OCM Input Voltage Range Input Resistance Input Offset Voltage Input Bias Current V CMRR OCM Gain POWER SUPPLY Operating Range Quiescent Current ...
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... IN, cm Maximum ∆V ; single-ended output OUT ∆V /∆V ; ∆ MHz; OUT, cm OUT, dm OUT, dm see Figure 44 for test circuit Rev Page ADA4937 kΩ, unless otherwise noted. All L, dm Min Typ Max 1900 200 1300 4000 <1 −106 −88 −81 − ...
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... ADA4937-1 Table ±OUT Performance OCM Parameter V DYNAMIC PERFORMANCE OCM −3 dB Bandwidth Slew Rate Input Voltage Noise (RTI) V INPUT CHARACTERISTICS OCM Input Voltage Range Input Resistance Input Offset Voltage Input Bias Current V CMRR OCM Gain POWER SUPPLY Operating Range Quiescent Current ...
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... Table 6. Thermal Resistance Package Type θ 16-Lead LFCSP (Exposed Pad) 95 Maximum Power Dissipation The maximum safe power dissipation in the ADA4937-1 package is limited by the associated rise in junction temperature ( the die. At approximately 150°C, J which is the glass transition temperature, the plastic changes its properties. Even temporarily exceeding this ...
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... V OCM 10 +OUT 11 −OUT −V S PIN 1 INDICATOR 12 PD –FB 1 ADA4937-1 + –OUT TOP VIEW – +OUT (Not to Scale) + OCM Figure 4. Pin Configuration Description Negative Output for Feedback Component Connection. Positive Input Summing Node. Negative Input Summing Node. ...
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... Figure 8. Large Signal Frequency Response for Various Gains 3. 5. –3 –6 –9 –12 – 100 FREQUENCY (MHz) Figure 9. Large Signal Frequency Response for Various Supplies 6 +105°C +25°C –40° –3 –6 –9 – 100 FREQUENCY (MHz) ADA4937-1 1000 1000 1000 ...
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... ADA4937 1kΩ 100Ω 200Ω –3 –6 – 100 FREQUENCY (MHz) Figure 11. Small Signal Frequency Response for Various Loads 100 mV p-p OUT 3.3V 3.3V 3.3V –3 –6 –9 –12 – ...
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... Figure 21. Harmonic Distortion vs. Frequency and Load –50 –60 –70 –80 –90 –100 –110 –120 10 0 –130 –1 Figure 22. Harmonic Distortion vs. V Rev Page ADA4937-1 HD2 + 200Ω F HD3 + 200Ω F HD2 + 402Ω F HD3 + 402Ω ...
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... ADA4937-1 –30 HD2 10MHz HD3 10MHz –40 HD2 75MHz HD3 75MHz –50 –60 –70 –80 –90 –100 –110 –120 1.0 1.5 2.0 2.5 V (V) OCM Figure 23. Harmonic Distortion vs. V –40 HD2 30MHz HD3 30MHz HD2 75MHz –50 HD3 75MHz –60 –70 –80 –90 –100 1.1 1.2 1.3 1.4 1.5 1.6 V (V) OCM Figure 24 ...
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... Figure 33. Overdrive Recovery Time (Pulse Input –1 –2 –3 –4 –5 100 0 Figure 34. Overdrive Amplitude Characteristics (Triangle Wave Input) Rev Page ADA4937 100 FREQUENCY (MHz) Figure 32. Noise Figure vs. Frequency TIME (2ns/DIV) V × DIFF OUT 100 200 ...
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... ADA4937 +25° 0°C 15 –40° 1.0 1.1 1.2 1.3 1.4 1.5 1.6 POWER-DOWN VOLTAGE (V) Figure 35. Supply Current vs. PD for Various Temperatures 0.20 0.15 0.10 0.05 0 –0.05 –0.10 –0.15 –0.20 TIME (1ns/DIV) Figure 36. Small Signal Pulse Response 2.60 2.58 2.56 2.54 2.52 2.50 2.48 2.46 2.44 2.42 2.40 TIME (2ns/DIV) Figure 37. Small Signal V Pulse Response OCM +105°C +55° ...
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... PD INPUT 2.0 1.8 1.6 1.4 1.2 1.0 0.8 0.6 0.4 SINGLE OUTPUT 0.2 0 TIME (150ns/DIV) Figure 41. PD Response vs. Time 100 100 1k Figure 42. Voltage Spectral Noise Density, RTI Rev Page ADA4937-1 10k 100k 1M 10M FREQUENCY (Hz) ...
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... OCM 200Ω 27.5Ω 200Ω Figure 44. Test Circuit for Output Balance 200Ω 5V 50Ω 200Ω FILTER V ADA4937-1 61.9Ω OCM 200Ω 27.5Ω 200Ω Figure 45. Test Circuit for Distortion Measurements Rev Page 1kΩ 50Ω 50Ω 0.1µF 412Ω ...
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... Figure 44). By this definition, output balance is the magnitude of the output common-mode voltage divided by the magnitude of the output differential mode voltage. Output Rev Page ADA4937 )/2 +OUT −OUT V ...
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... ADA4937-1 behaves much like a standard voltage feedback op amp and makes it easier to perform single-ended-to-differential conversions, common-mode level shifting, and amplifications of differential signals. Also like an op amp, the ADA4937-1 has high input impedance and low output impedance. Two feedback loops are employed to control the differential and common-mode output voltages ...
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... − ⎜ ⎟ × + ⎝ ⎠ OCM ADA4937 pin of the ADA4937-1 is internally biased at a voltage OCM input is driven by a low impedance OCM ADA4937-1 OUT OUT, dm ...
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... The input impedance of the V pin is approximately 10 kΩ. If multiple OCM ADA4937-1 devices share one reference output recommended that a buffer be used. Table 9 and Table 10 list several common gain settings, associated resistor values, input impedance, output noise density, and approximate large signal bandwidth for both balanced and unbalanced input configurations ...
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... LAYOUT, GROUNDING, AND BYPASSING As a high speed device, the ADA4937-1 is sensitive to the PCB environment in which it operates. Realizing its superior performance requires attention to the details of high speed PCB design. The first requirement is a solid ground plane that covers as much of the board area around the ADA4937-1 as possible. ...
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... The ADA4937-1 eliminates the need for a transformer to drive the ADC and performs a single-ended- to-differential conversion and buffering of the driving signal. The ADA4937-1 is configured with a single 5 V supply and unity gain for a single-ended input to differential output. The 61.9 Ω termination resistor, in parallel with the single-ended input impedance of 267 Ω ...
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... The ADA4937-1 performs the single-ended-to- differential conversion, eliminating the need for a transformer to drive the ADC. The ADA4937-1 is configured with a single 5 V supply and a gain of ~2 V/V for a single-ended input to differential output. The 76.8 Ω termination resistor, in parallel with the single- ended input impedance of 137 Ω, provides a 50 Ω ac termination for the source. The additional 30 Ω ...
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... AD9230, and sets the output common mode of the ADA4937-1 at 1.4 V. One-third of the output common-mode voltage of the amplifier is fed back to the summing nodes, biasing –IN and + 0.5 V. For a common-mode voltage of 1.4 V, each ADA4937-1 output swings between 1.09 V and 1.71 V, providing a 1.25 V p-p differential output. A third-order, 125 MHz, low-pass filter between the ADA4937-1 and the and isolates the driver outputs from the ADC inputs ...
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... COMPLIANT TO JEDEC STANDARDS MO-220-VEED-2 EXCEPT FOR EXPOSED PAD DIMENSION. Figure 55. 16-Lead Lead Frame Chip Scale Package [LFCSP_VQ × Body, Very Thin Quad (CP-16-2) Dimensions shown in millimeters Package Description 16-Lead LFCSP_VQ 16-Lead LFCSP_VQ 16-Lead LFCSP_VQ Rev Page ADA4937-1 0.50 0.40 0.30 PIN 1 INDICATOR * 1. 1.30 SQ 1.15 ...
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... ADA4937-1 NOTES Rev Page ...
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... NOTES Rev Page ADA4937-1 ...
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... ADA4937-1 NOTES ©2007 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D06591-0-5/07(0) Rev Page ...