Datasheet

AD7986
Rev. B | Page 9 of 28
TYPICAL PERFORMANCE CHARACTERISTICS
AVDD = DVDD = VIO = 2.5 V, BVDD = 5.0 V, V
REF
= 5.0 V, external reference (PDREF = high, REFIN = low), unless otherwise noted.
0 65,536 131,072 196,608 262,144
–2.5
–2.0
–1.5
–1.0
–0.5
0
0.5
1.0
1.5
2.0
2.5
CODE
INL (LSB)
POSITIVE INL = +1.57LSB
NEGATIV
E INL = –1.25LSB
07956-005
Figure 5. Integral Nonlinearity vs. Code
0
101
1661
8250
35,204
41,811
34,894
7662
1418
68
3
0
0
5000
10,
000
15,000
20,000
25,000
30,000
35,000
40,000
45,000
3FF6 3FF8 3FFA 3FFC 3FFE 0
COUNTS
CODE IN HEX
07956-006
Figure 6. Histogram of DC Input at Code Center (External Reference)
0 1
55
547
407
35
0
0
5000
10,000
15,000
20,000
25,000
30,000
35,000
40,000
45,000
3FFEC 3FFEE 3FF0 3FF2 3FF4 3FF6 3FF8
COUNTS
CODE IN HEX
3662
12,773
31,020
39,395
29,138
2932
11,107
07956-007
Figure 7. Histogram of DC Input at Code Center (Internal Reference)
0 65,536 131,072 196,608 262,144
–2.0
–1.5
–1.0
–0.5
0
0.5
1.0
1.5
2.0
CODE
DNL (LSB)
POSITIVE DNL = +0.54LSB
NEGATIVE DNL = –0.60LSB
07956-008
Figure 8. Differential Nonlinearity vs. Code
0 4
142
34
1 0
0
5000
10,000
15,000
20,000
25,000
30,000
35,000
40,000
45,000
3FF5 3FF7 3FF9 3FFB 3FFD 3FFF 1
COUNTS
CODE IN HEX
10,211
38,665
41,
434
30,897
2283
6399
1002
07956-009
Figure 9. Histogram of DC Input at Code Transition (External Reference)
0 1
3
150
1282
6513
6879
1438
165
16
0
0
5000
10,000
15,000
20,000
25,000
30,000
35,000
40,000
3FFEB 3FFED 3FFEF 3FF1 3FF3 3FF5 3FF7 3FF9
COUNTS
CODE IN HEX
18,953
22,077
37,385
36,210
07956-010
Figure 10. Histogram of DC Input at Code Transition (Internal Reference)