AD7682/AD7689
TYPICAL PERFORMANCE CHARACTERISTICS
VDD = 2.5 V to 5.5 V, VREF = 2.5 V to 5 V, VIO = 2.3 V to VDD
1.5
1.5
1.0
1.0
0.5
DNL (LSB)
07353-009
INL (LSB)
0.5
0
0
–0.5
–0.5
–1.0
0
16,384
32,768
CODES
49,152
65,536
0
16,384
32,768
CODES
49,152
65,536
Figure 6. Integral Nonlinearity vs. Code, VREF = VDD = 5 V
200k
180k
160k
140k
135,326
124,689
σ
= 0.50
V
REF
= VDD = 5V
Figure 9. Differential Nonlinearity vs. Code, VREF = VDD = 5 V
160k
140k
120k
100k
135,207
σ
= 0.78
V
REF
= V
DD
= 2.5V
COUNTS
COUNTS
120k
100k
80k
60k
80k
63,257
60k
40k
51,778
40k
20k
07353-007
20k
0
0
487
619
CODE IN HEX
0
0
8001
0
8002
0
1
78
6649
7FFB 7FFC 7FFD 7FFE 7FFF 8000
CODE IN HEX
4090
8001
7FFA 7FFB 7FFC 7FFD 7FFE 7FFF 8000
8002
8003
Figure 7. Histogram of a DC Input at Code Center
0
–20
AMPLITUDE (dB of Full-Scale)
–40
–60
–80
–100
–120
–140
–160
07353-008
Figure 10. Histogram of a DC Input at Code Center
0
V
REF
= VDD = 2.5V
f
s
= 200kSPS
f
IN
= 19.9kHz
SNR = 88.0dB
SINAD = 87.0dB
THD = –89dB
SFDR = 89dB
SECOND HARMONIC = –105dB
THIRD HARMONIC = –90dB
AMPLITUDE (dB of Full-Scale)
V
REF
= VDD = 5V
f
S
= 250kSPS
f
IN
= 19.9kHz
SNR = 92.9dB
SINAD = 92.4dB
THD = –102dB
SFDR = 103dB
SECOND HARMONIC = –111dB
THIRD HARMONIC = –104dB
–20
–40
–60
–80
–100
–120
–140
–160
0
25
50
75
100
125
0
25
50
FREQUENCY (kHz)
75
100
FREQUENCY (kHz)
Figure 8. 20 kHz FFT, VREF = VDD = 5 V
Figure 11. 20 kHz FFT, VREF = VDD = 2.5 V
Rev. 0 | Page 11 of 28
07353-011
–180
–180
07353-010
0
60
1
07353-006
–1.5
–1.0
AD [ ANALOG DEVICES ]
