Datasheet

AD7684
Rev. A | Page 9 of 16
TYPICAL PERFORMANCE CHARACTERISTICS
–3
–2
–1
0
1
2
3
0 16384 32768 49152 65536
CODE
INL (LSB)
04302-007
POSITIVE INL = +0.83LSB
NEGATIVE INL = –1.07LSB
Figure 7. Integral Nonlinearity vs. Code
04302-008
151
94794
18557
17388
182
0
20000
40000
60000
80000
100000
120000
FFFD FFFE FFFF 0000 0001 0002 0003 0004 0005
CODE IN HEX
COUNTS
VDD = REF = 2.5V
00
00
Figure 8. Histogram of a DC Input at the Code Center
– 180
– 160
– 140
– 120
– 100
– 80
– 60
– 40
– 20
0
04302-009
010203040
FREQUENCY (kHz)
AMPLITUDE (dB of Full Scale)
50
16384 POINT FFT
VDD = REF = 5V
f
S
= 100kSPS
f
IN
= 20.43kHz
Figure 9. FFT Plot
–3
–2
–1
0
1
2
3
0 16384 32768 49152 65536
CODE
DNL (LSB)
04302-010
POSITIVE DNL = +0.9LSB
NEGATIVE DNL = –0.45LSB
Figure 10. Differential Nonlinearity vs. Code
04302-011
123872
4150
3050
0
50000
100000
150000
FFFB FFFC FFFD FFFE FFFF
CODE IN HEX
COUNTS
0
0
VDD = REF = 5V
Figure 11. Histogram of a DC Input at the Code Center
– 180
– 160
– 140
– 120
– 100
– 80
– 60
– 40
– 20
0
04302-012
010203040
FREQUENCY (kHz)
AMPLITUDE (dB of Full Scale)
50
16384 POINT FFT
VDD = REF = 2.5V
f
S
= 100kSPS
f
IN
= 20.43kHz
Figure 12. FFT Plot