Datasheet

AD7699 Data Sheet
Rev. | Page 8 of 28
TYPICAL PERFORMANCE CHARACTERISTICS
VDD = 5V, VREF = 5V, VIO = VDD, unless otherwise noted
1.5
1.0
0.5
0
–0.5
–1.0
–1.5
0 16,384 32,768 49,152 65,536
CODES
(LSBS)
07354-006
Figure 5. Integral Nonlinearity vs. Code
250,000
200,000
150,000
100,000
50,000
0
003
13,341
26,926
10 0 0
COUNTS
7FF9 7FFA 7FFB 7FFC 7FFD 7FFE 7FFF 8000 8001
CODE IN HEX
07354-005
σ = 0.51 LSB
V
REF
= 5V
220,840
Figure 6. Histogram of a DC Input at Code Center
0
–20
–40
–60
–80
–100
–120
–140
–160
–180
0 25 50 75 100 125 150 175 200 225 250
FREQUENCY (kHz)
AMPLITUDE (dB OF FULL SCALE)
V
REF
= 5V
f
S
= 500kSPS
f
IN
= 19.94kHz
SNR = 92.3dB
SINAD = 91.5dB
THD = –98dB
SFDR = 100dB
SECOND HARMONIC = –111dB
THIRD HARMONIC = –101dB
07354-007
Figure 7. 20 kHz FFT, VREF = 5 V
1.5
1.0
0.5
0
–0.5
–1.0
0 16,384 32,768 49,152 65,536
CODES
(LSBS)
07354-009
Figure 8. Differential Nonlinearity vs. Code
250,000
200,000
150,000
100,000
50,000
0
0
COUNTS
0119
31,411
157 0 0
σ = 0.78 LSB
V
REF
= 4.096V
191,013
38,420
7FF9 7FFA 7FFB 7FFC 7FFD 7FFE 7FFF 8000 8001
CODE IN HEX
07354-008
Figure 9. Histogram of a DC Input at Code Center
0
–20
–40
–60
–80
–100
–120
–140
–160
–180
0 25 50 75 100 125 150 175 200 225 250
FREQUENCY (kHz)
AMPLITUDE (dB OF FULL SCALE)
V
REF
= 4.096V
f
S
= 500kSPS
f
IN
= 19.94kHz
SNR = 91.1dB
SINAD = 90.4dB
THD = –98dB
SFDR = 100dB
SECOND HARMONIC = –104dB
THIRD HARMONIC = –101dB
07354-010
Figure 10. 20 kHz FFT, VREF = 4.096 V
B