Datasheet

AD7265
Rev. A | Page 10 of 28
04674-012
CODE
2046 2047 20492048 2050
NO. OF OCCURRENCES
10000
8000
9000
6000
7000
4000
5000
2000
1000
3000
0
10000
CODES
DIFFERENTIAL
MODE
INTERNAL
REFERENCE
04674-009
V
REF
(V)
2.50 0.5 1.0 1.5 2.0
LINEARITY ERROR (LSB)
1.0
0.6
0.8
0.2
0.4
–0.2
0
–0.6
–0.4
–1.0
–0.8
V
DD
= 3V/5V
DIFFERENTIAL MODE
POSITIVE INL
POSITIVE DNL
NEGATIVE DNL
NEGATIVE INL
Figure 10. Linearity Error vs. V
Figure 13. Histogram of Codes for 10k Samples in Differential Mode
REF
04674-010
V
REF
(V)
5.00 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5
EFFECTIVE NUMBER OF BITS
12.0
11.0
11.5
10.0
10.5
9.0
9.5
8.0
7.5
8.5
7.0
V
DD
= 5V
DIFFERENTIAL MODE
V
DD
= 3V
DIFFERENTIAL MODE
V
DD
= 3V
SINGLE-ENDED MODE
V
DD
= 5V
SINGLE-ENDED MODE
04674-042
CODE
2046 2047 2048 2049 2050
NO. OF OCCURRENCES
10000
9000
8000
7000
6000
5000
4000
3000
2000
1000
0
9984
CODES
SINGLE-ENDED
MODE
INTERNAL
REFERENCE
5 CODES 11 CODES
Figure 11. Effective Number of Bits vs. V
REF
Figure 14. Histogram of Codes for 10k Samples in Single-Ended Mode
04674-011
CURRENT LOAD (μA)
2000 20 40 60 80 100 120 140 160 180
V
REF
(V)
2.5010
2.5000
2.5005
2.4995
2.4990
2.4985
2.4980
04674-040
RIPPLE FREQUENCY (kHz)
12000 200 400 600 800 1000
CMRR (dB)
–60
–65
–70
–75
–80
–85
–95
–90
–100
DIFFERENTIAL MODE
V
DD
= 3V/5V
vs. Reference Output Current Drive
Figure 12. V
REF
Figure 15. CMRR vs. Common-Mode Ripple Frequency