Datasheet AD7684 (Analog Devices) - 10

AD7684 TYPICAL PERFORMANCE CHARACTERISTICS 3 3 POSITIVE INL = +0.83LSB POSITIVE DNL = +0.9LSB NEGATIVE INL = –1.07LSB NEGATIVE DNL = –0.45LSB 2 2 1 1 ) ) B B S L 0 ( 0 L IN DNL (LS –1 –1 –2 –2
7 00 2- 430
–3
0
–3
04302-010
0 16384 32768 49152 65536 0 16384 32768 49152 65536 CODE CODE
Figure 7. Integral Nonlinearity vs. Code Figure 10. Differential Nonlinearity vs. Code
120000 150000 VDD = REF = 2.5V VDD = REF = 5V 94794 123872 100000 80000 100000 60000 COUNTS COUNTS 40000 50000 17388 18557 20000 3050 4150 0 0 151 182 0 0 0 0
04302-008
0
04302-011
0 FFFD FFFE FFFF 0000 0001 0002 0003 0004 0005 FFFB FFFC FFFD FFFE FFFF CODE IN HEX CODE IN HEX
Figure 8. Histogram of a DC Input at the Code Center Figure 11. Histogram of a DC Input at the Code Center
0 0 16384 POINT FFT 16384 POINT FFT –20 VDD = REF = 5V –20 VDD = REF = 2.5V f fS = 100kSPS ) S = 100kSPS –40 ) f le fIN = 20.43kHz –40 IN = 20.43kHz a le c a c –60 –60 –80 –80 (dB of Full S –100 (dB of Full S –100 –120 LITUDE –120 LITUDE AMP –140 AMP –140 –160 –160 –180
04302-009
–180
04302-012
0 10 20 30 40 50 0 10 20 30 40 50 FREQUENCY (kHz) FREQUENCY (kHz)
Figure 9. FFT Plot Figure 12. FFT Plot Rev. A | Page 9 of 16 Document Outline FEATURES APPLICATIONS APPLICATION DIAGRAM GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS TIMING SPECIFICATIONS Timing Diagrams ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TERMINOLOGY TYPICAL PERFORMANCE CHARACTERISTICS APPLICATION INFORMATION CIRCUIT INFORMATION CONVERTER OPERATION TRANSFER FUNCTIONS TYPICAL CONNECTION DIAGRAM ANALOG INPUTS DRIVER AMPLIFIER CHOICE VOLTAGE REFERENCE INPUT POWER SUPPLY DIGITAL INTERFACE LAYOUT EVALUATING THE PERFORMANCE OF THE AD7684 OUTLINE DIMENSIONS ORDERING GUIDE