Datasheet ADA4939-1/ADA4939-2 (Analog Devices) - 10
| Manufacturer | Analog Devices |
| Description | Ultralow Distortion Differential ADC Driver |
| Pages / Page | 24 / 10 — ADA4939-1/ADA4939-2. Data Sheet. OUT, dm = 100mV p-p. OUT, dm = 2V p-p. N … |
| Revision | A |
| File Format / Size | PDF / 597 Kb |
| Document Language | English |
ADA4939-1/ADA4939-2. Data Sheet. OUT, dm = 100mV p-p. OUT, dm = 2V p-p. N (. D CL. –10. –11. L = 1kΩ. RL = 200Ω. –12. 100. FREQUENCY (MHz). 6 V
Model Line for this Datasheet
Text Version of Document
ADA4939-1/ADA4939-2 Data Sheet 3 3 V V 2 OUT, dm = 100mV p-p 2 OUT, dm = 2V p-p B) 1 B) d 1 d N ( 0 N ( 0 AI –1 AI –1 G G P –2 P O –2 O O –3 O –3 -L -L D –4 D E –4 E S –5 S O –5 O –6 –6 D CL D CL E –7 E –7 IZ IZ –8 –8 AL AL –9 –9 RM RM –10 –10 NO R NO R –11 L = 1kΩ –11 L = 1kΩ RL = 200Ω RL = 200Ω –12 –12 1 10 100 1k
13 16 0
1 10 100 1k
0 9- 9-
FREQUENCY (MHz)
42
FREQUENCY (MHz)
42 07 07 Figure 13. Small Signal Frequency Response for Various Loads Figure 16. Large Signal Frequency Response for Various Loads
6 V –55 OUT, dm = 100mV p-p VOUT, dm = 2V p-p –60 HD2, G = 2 3 –65 HD3, G = 2 Bc) –70 d HD2, G = 3.16 ) ( HD3, G = 3.16 B N –75 0 HD2, G = 5 (d IO T IN R –80 HD3, G = 5 O GA T –85 S M –3 DI OC –90 V IC N O –95 –6 –100 ARM H VOCM = 1.0V –105 VOCM = 3.9V V –110 OCM = 2.5V –9 1 10 100 1k
19
–115
0 9-
1 10 100
22 0
FREQUENCY (MHz)
42 9- 07
FREQUENCY (MHz)
42 07 Figure 14. VOCM Small Signal Frequency Response at Various DC Levels Figure 17. Harmonic Distortion vs. Frequency at Various Gains
0.5 –60 VOUT, dm = 100mV p-p VOUT, dm = 2V p-p 0.4 V B) –65 S = ±2.5V d HD2, RL, dm = 1kΩ N ( 0.3 –70 HD3, R AI Bc) L, dm = 1kΩ HD2, R G d L, dm = 200Ω 0.2 ( P –75 N HD3, RL, dm = 200Ω O O IO 0.1 –80 -L RT D O E 0 T S –85 S O –0.1 C DI –90 D CL NI E RL = 1kΩ O IZ –0.2 R M –95 L = 200Ω AL –0.3 RL = 1kΩ OUT1 HAR –100 RM RL = 1kΩ OUT2 NO –0.4 RL = 200Ω OUT1 –105 RL = 200Ω OUT2 –0.5 –110 1 10 100 1k
20 23 0
1 10 100
0 9- 9-
FREQUENCY (MHz)
42
FREQUENCY (MHz)
42 07 07 Figure 15. 0.1 dB Flatness Small Signal Response for Various Loads Figure 18. Harmonic Distortion vs. Frequency at Various Loads Rev. A | Page 10 of 24 Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAMS TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS 5 V OPERATION ±DIN to VOUT, dm Performance VOCM to VOUT, cm Performance General Performance 3.3 V OPERATION ±DIN to VOUT, dm Performance VOCM to VOUT, cm Performance General Performance ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE MAXIMUM POWER DISSIPATION ESD CAUTION PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS TEST CIRCUITS OPERATIONAL DESCRIPTION DEFINITION OF TERMS Differential Voltage Common-Mode Voltage Balance THEORY OF OPERATION ANALYZING AN APPLICATION CIRCUIT SETTING THE CLOSED-LOOP GAIN STABLE FOR GAINS ≥2 ESTIMATING THE OUTPUT NOISE VOLTAGE IMPACT OF MISMATCHES IN THE FEEDBACK NETWORKS CALCULATING THE INPUT IMPEDANCE FOR AN APPLICATION CIRCUIT Terminating a Single-Ended Input INPUT COMMON-MODE VOLTAGE RANGE INPUT AND OUTPUT CAPACITIVE AC COUPLING MINIMUM RG VALUE OF 50 Ω SETTING THE OUTPUT COMMON-MODE VOLTAGE LAYOUT, GROUNDING, AND BYPASSING HIGH PERFORMANCE ADC DRIVING OUTLINE DIMENSIONS ORDERING GUIDE
13 16 0
1 10 100 1k
0 9- 9-
FREQUENCY (MHz)
42
FREQUENCY (MHz)
42 07 07 Figure 13. Small Signal Frequency Response for Various Loads Figure 16. Large Signal Frequency Response for Various Loads
6 V –55 OUT, dm = 100mV p-p VOUT, dm = 2V p-p –60 HD2, G = 2 3 –65 HD3, G = 2 Bc) –70 d HD2, G = 3.16 ) ( HD3, G = 3.16 B N –75 0 HD2, G = 5 (d IO T IN R –80 HD3, G = 5 O GA T –85 S M –3 DI OC –90 V IC N O –95 –6 –100 ARM H VOCM = 1.0V –105 VOCM = 3.9V V –110 OCM = 2.5V –9 1 10 100 1k
19
–115
0 9-
1 10 100
22 0
FREQUENCY (MHz)
42 9- 07
FREQUENCY (MHz)
42 07 Figure 14. VOCM Small Signal Frequency Response at Various DC Levels Figure 17. Harmonic Distortion vs. Frequency at Various Gains
0.5 –60 VOUT, dm = 100mV p-p VOUT, dm = 2V p-p 0.4 V B) –65 S = ±2.5V d HD2, RL, dm = 1kΩ N ( 0.3 –70 HD3, R AI Bc) L, dm = 1kΩ HD2, R G d L, dm = 200Ω 0.2 ( P –75 N HD3, RL, dm = 200Ω O O IO 0.1 –80 -L RT D O E 0 T S –85 S O –0.1 C DI –90 D CL NI E RL = 1kΩ O IZ –0.2 R M –95 L = 200Ω AL –0.3 RL = 1kΩ OUT1 HAR –100 RM RL = 1kΩ OUT2 NO –0.4 RL = 200Ω OUT1 –105 RL = 200Ω OUT2 –0.5 –110 1 10 100 1k
20 23 0
1 10 100
0 9- 9-
FREQUENCY (MHz)
42
FREQUENCY (MHz)
42 07 07 Figure 15. 0.1 dB Flatness Small Signal Response for Various Loads Figure 18. Harmonic Distortion vs. Frequency at Various Loads Rev. A | Page 10 of 24 Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAMS TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS 5 V OPERATION ±DIN to VOUT, dm Performance VOCM to VOUT, cm Performance General Performance 3.3 V OPERATION ±DIN to VOUT, dm Performance VOCM to VOUT, cm Performance General Performance ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE MAXIMUM POWER DISSIPATION ESD CAUTION PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS TEST CIRCUITS OPERATIONAL DESCRIPTION DEFINITION OF TERMS Differential Voltage Common-Mode Voltage Balance THEORY OF OPERATION ANALYZING AN APPLICATION CIRCUIT SETTING THE CLOSED-LOOP GAIN STABLE FOR GAINS ≥2 ESTIMATING THE OUTPUT NOISE VOLTAGE IMPACT OF MISMATCHES IN THE FEEDBACK NETWORKS CALCULATING THE INPUT IMPEDANCE FOR AN APPLICATION CIRCUIT Terminating a Single-Ended Input INPUT COMMON-MODE VOLTAGE RANGE INPUT AND OUTPUT CAPACITIVE AC COUPLING MINIMUM RG VALUE OF 50 Ω SETTING THE OUTPUT COMMON-MODE VOLTAGE LAYOUT, GROUNDING, AND BYPASSING HIGH PERFORMANCE ADC DRIVING OUTLINE DIMENSIONS ORDERING GUIDE
