Datasheet

AD7654
Rev. B | Page 12 of 28
TYPICAL PERFORMANCE CHARACTERISTICS
CODE
–1
INL (LSB)
–5
–3
655350
–2
–4
3276816384 49152
0
1
2
3
4
5
03057-005
Figure 5. Integral Nonlinearity vs. Code
CODE IN HEX
7FBF
0
COUNTS
8000
6000
4000
2000
0
7000
3000
1000
5000
7FC0
0
7FC1
14
7FC2
953
7FC3
7288
7FC4
7220
7FC5
903
7FC6
6
7FC7
0
7FC8
0
03057-006
Figure 6. Histogram of 16,384 Conversions of a DC Input at the
Code Transition
FREQUENCY (kHz)
–120
AMPLITUDE (dB of Full Scale)
–160
1500
–140
10050 125
–100
–80
–60
–40
–20
0
25 75 175 200 225 250
8192 POINT FFT
f
S
= 500kHz
f
IN
= 100kHz, –0.5dB
SNR = 89.9dB
SINAD = 89.4dB
THD = –99.3dB
03057-007
Figure 7. FFT Plot
CODE
DNL (LSB)
–3
0
–2
16384 32768
–1
0
1
2
3
49152 65535
03057-008
Figure 8. Differential Nonlinearity vs. Code
CODE IN HEX
8000
7FC0
0
COUNTS
7000
4000
2000
0
6000
3000
1000
5000
7FC1 7FC2 7FC3
176
7FC4 7FC5
132
7FC6 7FC7
00
7FBF
0
9366
9000
10000
3411
3299
03057-009
Figure 9. Histogram of 16,384 Conversions of a DC Input at the
Code Center
TEMPERATURE (°C)
96
SNR (dB)
84
90
25 125–55
93
87
–35 65455 105–15 85
–
98
THD (dB)
–106
–102
–100
–104
SNR
THD
03057-010
Figure 10. SNR, THD vs. Temperature