Datasheet

AD7683
Rev. A | Page 9 of 16
TYPICAL PERFORMANCE CHARACTERISTICS
3
2
1
0
–1
–2
–3
0 16384 32768 49152 65536
04301-012
CODE
INL (LSB)
POSITIVE INL = +0.43LSB
NEGATIVE INL = –0.97LSB
Figure 7. Integral Nonlinearity vs. Code
7000
6000
5000
4000
3000
2000
1000
0
79FD79FE79FF7A007A017A027A037A047A057A067A077A08
04301-009
CODE IN HEX
COUNTS
VDD = REF = 2.5V
001
4604
130
00
2755
25440
50
62564
35528
Figure 8. Histogram of a DC Input at the Code Center
0
–180
–160
–140
–120
–100
–80
–60
–40
–20
0 10203040
04301-008
FREQUENCY (kHz)
AMPLITUDE (dB OF FULL SCALE)
50
16384 POINT FFT
VDD = REF = 5V
f
S
= 100kSPS
f
IN
= 20.43kHz
SNR = 92.7dB
THD = –105.7dB
SFDR = –106.4dB
Figure 9. FFT Plot
3
2
1
0
–1
–2
–3
0 16384 32768 49152 65536
04301-011
CODE
DNL (LSB)
POSITIVE DNL = +0.43LSB
NEGATIVE DNL = –0.41LSB
Figure 10. Differential Nonlinearity vs. Code
120000
100000
80000
60000
40000
20000
0
7A0E 7A0F 7A10 7A11 7A12 7A13 7A14 7A15 7A16
04301-010
CODE IN HEX
COUNTS
006 00
102287
13619
15152
8
VDD = REF = 5V
Figure 11. Histogram of a DC Input at the Code Center
0
–180
–160
–140
–120
–100
–80
–60
–40
–20
0 102030405
04301-007
FREQUENCY (kHz)
AMPLITUDE (dB OF FULL SCALE)
0
16384 POINT FFT
VDD = REF = 2.5V
f
S
= 100kSPS
f
IN
= 20.43kHz
SNR = 88.7dB
THD = –102.6dB
SFDR = –104.6dB
Figure 12. FFT Plot