Datasheet AD6644 (Analog Devices) - 10

AD6644 TYPICAL PERFORMANCE CHARACTERISTICS 0 75.0 ENCODE = 65MSPS –10 AIN = 2.2MHz @ –1dBFS ENCODE = 65MSPS, AIN = –1dBFS TEMP = –25°C, +25°C, +85°C –20 SNR = 74.5dB SFDR = 92dBc 74.5 –30 T = –25°C –40 74.0 –50 ) ) S B –60 T = +85°C F d T = +25°C B 73.5 (d –70 NR ( S –80 –90 73.0 –100 –110 72.5 –120 –130 72.0 0 5 10 15 20 25 30
004 007 1-
0 5 10 15 20 25 30
1-
FREQUENCY (MHz)
97
FREQUENCY (MHz)
97 00 00 Figure 4. Single Tone at 2.2. MHz Figure 7. Noise vs. Analog Frequency (Nyquist)
0 94 ENCODE = 65MSPS –10 ENCODE = 65MSPS, AIN = –1dBFS AIN = 15.5MHz @ –1dBFS TEMP = –25°C, +25°C, +85°C –20 SNR = 74dB 92 SFDR = 90dBc –30 Bc) d –40 C ( 90 T = +25°C NI –50 T = –25°C, +85°C O ) S 88 –60 F –70 HARM (dB E S 86 –80 -CA –90 T 84 –100 RS O –110 W 82 –120 –130 80 0 5 10 15 20 25 30
08 -005
0 5 10 15 20 25 30
0 71 1-
FREQUENCY (MHz)
97 009
ANALOG INPUT FREQUENCY (MHz)
00 Figure 5. Single Tone at 15.5 MHz Figure 8. Harmonics vs. Analog Frequency (Nyquist)
0 75 –10 ENCODE = 65MSPS LOW NOISE ANALOG SOURCE AIN = 30MHz @ –1dBFS –20 SNR = 73.5dB 74 SFDR = 85dBc –30 –40 73 –50 ) S 72 –60 B) F d B –70 (d NR ( PHASE NOISE OF ANALOG SOURCE S 71 –80 DEGRADES PERFORMANCE –90 70 –100 –110 69 –120 AIN = –1dBFS ENCODE = 65MSPS –130 68 0 5 10 15 20 25 30
006 1-
0 10 20 30 40 50 60 70 80 90 100
-009
FREQUENCY (MHz)
97
ANALOG FREQUENCY (MHz)
00 0971 0 Figure 6. Single Tone at 30 MHz Figure 9. Noise vs. Analog Frequency (IF) Rev. D | Page 9 of 24 Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION PRODUCT HIGHLIGHTS FUNCTIONAL BLOCK DIAGRAM TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS DC SPECIFICATIONS DIGITAL SPECIFICATIONS SWITCHING SPECIFICATIONS AC SPECIFICATIONS TIMING DIAGRAM ABSOLUTE MAXIMUM RATINGS EXPLANATION OF TEST LEVELS Test Level THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS EQUIVALENT CIRCUITS TERMINOLOGY THEORY OF OPERATION APPLYING THE AD6644 Encoding the AD6644 Analog Input Power Supplies Digital Outputs Layout Information Jitter Considerations EVALUATION BOARD OUTLINE DIMENSIONS ORDERING GUIDE