EVAL-AD7689EDZ Datasheet, PDF (12/32 Pages) Analog Devices – 16-Bit, 4-Channel/8-Channel, 250 kSPS PulSAR ADC

AD7682/AD7689
Data Sheet
TYPICAL PERFORMANCE CHARACTERISTICS
VDD = 2.5 V to 5.5 V, VREF = 2.5 V to 5 V, VIO = 2.3 V to VDD, unless otherwise noted.
1.5
INL MAX = +0.34 LSB
INL MIN = –0.44 LSB
1.0
1.5
DNL MAX = +0.20 LSB
DNL MIN = –0.22 LSB
1.0
0.5
0.5
0
0
–0.5
–0.5
–1.0
–1.5
0
16,384
32,768
CODES
49,152
65,536
Figure 6. Integral Nonlinearity vs. Code, VREF = VDD = 5 V
200k
180k
160k
140k
120k
135,326
124,689
σ = 0.50
V_REF = VDD = 5V
100k
80k
60k
40k
20k
0
0 487
619 0
0
7FFA 7FFB 7FFC 7FFD 7FFE 7FFF 8000
CODE IN HEX
0
8001
0
8002
Figure 7. Histogram of a DC Input at Code Center
0
V_REF = VDD = 5V
–20
f_S= 250kSPS
f_IN = 19.9kHz
–40
SNR = 92.9dB
SINAD = 92.4dB
–60
THD = –102dB
SFDR = 103dB
SECOND HARMONIC = –111dB
–80
THIRD HARMONIC = –104dB
–100
–120
–140
–160
–180
0
25
50
75
100
125
FREQUENCY (kHz)
Figure 8. 20 kHz FFT, VREF = VDD = 5 V
–1.0
0
16,384
32,768
CODES
49,152
65,536
Figure 9. Differential Nonlinearity vs. Code, VREF = VDD = 5 V
160k
140k
135,207
σ = 0.78
V_REF = VDD = 2.5V
120k
100k
80k
63,257
60k
51,778
40k
20k
6649
1 78
0
7FFB 7FFC 7FFD 7FFE 7FFF 8000
CODE IN HEX
4090
8001
60
8002
1
8003
Figure 10. Histogram of a DC Input at Code Center
0
V_REF = VDD = 2.5V
–20
f_s= 200kSPS
f_IN = 19.9kHz
–40
SNR = 88.0dB
SINAD = 87.0dB
–60
THD = –89dB
SFDR = 89dB
SECOND HARMONIC = –105dB
–80
THIRD HARMONIC = –90dB
–100
–120
–140
–160
–180
0
25
50
75
100
FREQUENCY (kHz)
Figure 11. 20 kHz FFT, VREF = VDD = 2.5 V
Rev. D | Page 12 of 32