Datasheet AD7986 (Analog Devices) - 10

Data Sheet AD7986 TYPICAL PERFORMANCE CHARACTERISTICS
AVDD = DVDD = VIO = 2.5 V, BVDD = 5.0 V, VREF = 5.0 V, external reference (PDREF = high, REFIN = low), unless otherwise noted.
2.5 2.0 POSITIVE INL = +1.57LSB POSITIVE DNL = +0.54LSB 2.0 NEGATIVE INL = –1.25LSB 1.5 NEGATIVE DNL = –0.60LSB 1.5 1.0 1.0 0.5 ) 0.5 ) SB SB 0 (L (L 0 L L IN –0.5 DN –0.5 –1.0 –1.0 –1.5 –1.5 –2.0
005 008
–2.5
07956-
–2.0
07956-
0 65,536 131,072 196,608 262,144 0 65,536 131,072 196,608 262,144 CODE CODE
Figure 5. Integral Nonlinearity vs. Code Figure 8. Differential Nonlinearity vs. Code
45,000 45,000 41,811 41,434 40,000 40,000 38,665 35,204 34,894 35,000 35,000 30,897 30,000 30,000 S S 25,000 25,000 UNT UNT 20,000 CO 20,000 CO 15,000 15,000 10,211 10,000 8250 10,000 7662 6399 5000 5000 2283
006 009
1661 1418 1002 0 101 68 3 0 0 4 142 34 1 0 0
07956-
0
07956-
3FF6 3FF8 3FFA 3FFC 3FFE 0 3FF5 3FF7 3FF9 3FFB 3FFD 3FFF 1 CODE IN HEX CODE IN HEX
Figure 6. Histogram of DC Input at Code Center (External Reference) Figure 9. Histogram of DC Input at Code Transition (External Reference)
45,000 40,000 37,385 36,210 40,000 39,395 35,000 35,000 30,000 31,020 30,000 29,138 25,000 S 22,077 25,000 S UNT 20,000 UNT 18,953 20,000 O CO C 15,000 15,000 12,773 11,107 10,000 10,000 6513 6879 5000 3662 5000 2932
010
547 1438 0 1 55 407 35 0 0 1 3 1501282 165 16 0 0 0
07956-
3FFEC 3FFEE 3FF0 3FF2 3FF4 3FF6 3FF8
007
3FFEB 3FFED 3FFEF 3FF1 3FF3 3FF5 3FF7 3FF9 CODE IN HEX CODE IN HEX
07956- Figure 7. Histogram of DC Input at Code Center (Internal Reference) Figure 10. Histogram of DC Input at Code Transition (Internal Reference) Rev. D | Page 9 of 28 Document Outline FEATURES APPLICATIONS TYPICAL APPLICATION CIRCUIT GENERAL DESCRIPTION REVISION HISTORY SPECIFICATIONS TIMING SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS TERMINOLOGY THEORY OF OPERATION CIRCUIT INFORMATION CONVERTER OPERATION CONVERSION MODES OF OPERATION Transfer Functions TYPICAL CONNECTION DIAGRAM ANALOG INPUTS DRIVER AMPLIFIER CHOICE VOLTAGE REFERENCE INPUT Internal Reference, REF = 4.096V (PDREF = Low) External 1.2 V Reference and Internal Buffer (PDREF = High) External Reference (PDREF = High, REFIN = Low) Reference Decoupling POWER SUPPLY DIGITAL INTERFACE DATA READING OPTIONS Reading During Conversion, Fast Hosts (Turbo or Normal Mode) Split-Reading, Any Speed Host (Turbo or Normal Mode) Reading During Acquisition, Any Speed Hosts (Turbo or Normal Mode) /CS MODE, 3-WIRE WITHOUT BUSY INDICATOR /CS MODE, 3-WIRE WITH BUSY INDICATOR /CS MODE, 4-WIRE WITHOUT BUSY INDICATOR /CS MODE, 4-WIRE WITH BUSY INDICATOR CHAIN MODE WITHOUT BUSY INDICATOR CHAIN MODE WITH BUSY INDICATOR APPLICATION HINTS LAYOUT EVALUATING THE PERFORMANCE OF THE AD7986 OUTLINE DIMENSIONS ORDERING GUIDE