Datasheet

AD7641
Rev. 0 | Page 12 of 28
TYPICAL PERFORMANCE CHARACTERISTICS
3.0
2.5
2.0
–3.0
–2.5
0 262144
CODE
INL (LSB)
04761-005
1.5
1.0
0.5
0
–0.5
–1.0
–2.0
–1.5
65536 131072 196608
Figure 5. Integral Nonlinearity vs. Code
40000
0
00 0392322
11
683
272
1FFEF
1FFF0 1FFF1 1FFF2 1FFF3 1FFF4 1FFF5 1FFF6 1FFF7 1FFF8 1FFF9
1FFFA
1FFFB 1FFFC 1FFFD
1FFFE
1FFFF
20000
04761-006
CODE IN HEX
COUNTS
35000
30000
25000
20000
15000
10000
5000
0
34844
31003
24739
16207
5248
2124
10938
4730
σ = 1.55
Figure 6. Histogram of 261,120 Conversions of a DC Input at
the Code Center (External Reference)
2.0530
2.0480
–55 125
04761-007
TEMPERATURE (°C)
V
REF
(V)
2.0525
2.0520
2.0515
2.0510
2.0505
2.0500
2.0495
2.0490
2.0485
–35 –15 5 25 45 65 85 105
Figure 7. Typical Reference Voltage Output vs. Temperature (3 Units)
2.0
–2.0
0 262144
CODE
DNL (LSB)
04761-008
1.5
1.0
0.5
0
–0.5
–1.0
–1.5
65536 131072 196608
Figure 8. Differential Nonlinearity vs. Code
30000
0
1FED9
1FEDB 1FEDD
1FEDF
1FEE1 1FEE3 1FEE5 1FEE7 1FEE9
1FEEB
1FEDA
1FEDC
1FEDE
1FEE0 1FEE2 1FEE4 1FEE6 1FEE8
1FEEA
04761-009
CODE IN HEX
COUNTS
25000
20000
15000
10000
5000
11
52
117
912
2105
10846
12922
22225
24731
23436
18995
8219
4688
1171
589
51
10 1
σ = 2.02
Figure 9. Histogram of 261,120 Conversions of a DC Input at
the Code Center (Internal Reference)
20
–20
–55 125
04761-010
TEMPERATURE (°C)
ZERO-ERROR, FULL-SCALE ERROR (LSB)
18
16
14
12
10
8
6
4
2
0
–2
–4
–6
–8
–10
–12
–14
–16
–18
–35 –15 5 25 45 65 85 105
ZERO-ERROR
–FS
+FS
Figure 10. Zero Error, Positive and Negative Full Scale vs. Temperature