Datasheet

AD7294 Data Sheet
Rev. H | Page 16 of 48
1.5
1.0
0.5
0
–0.5
–1.0
–1.5
–2.0
–2.5
0 654321
INL (LSB)
REFERENCE VOLTAGE (V)
MIN INL
MAX INL
T
A
= 25°C
V
DRIVE
= 5V, V
REF
RANGE
V
DD
= 5V
SINGLE-ENDED
I
2
C MODE 400kHz
05747-093
Figure 18. ADC INL vs. Reference Voltage
0.8
0.6
0.4
0.2
0
–0.2
–0.4
–0.6
0 654321
DNL (LSB)
REFERENCE VOLTAGE (V)
MIN DNL
MAX DNL
T
A
= 25°C
V
DRIVE
= 5V, V
REF
RANGE
V
DD
= 5V
SINGLE-ENDED
I
2
C MODE 400kHz
05747-094
Figure 19. ADC DNL vs. Reference Voltage
05747-079
2.0
1.0
1.5
0.5
0
–1.0
–2.0
–0.5
–1.5
INL (LSB)
CODE
256
5120
768
1024
1280
1536
1792
2048
2304
2560
2816
3072
3328
3584
3840
4096
AV
DD
= DV
DD
= 5V
V
DRIVE
= 5V, INTERNAL REF,
OFFSET IN A/B/C/D = FLOATING
Figure 20. DAC INL
05747-080
0.6
0.4
0.2
0
–0.4
–0.6
–0.2
DNL (LSB)
CODE
256
5120
768
1024
1280
1536
1792
2048
2304
2560
2816
3072
3328
3584
3840
4096
AV
DD
= DV
DD
= 5V
V
DRIVE
= 5V, INTERNAL REF,
OFFSET IN A/B/C/D = FLOATING
Figure 21. DAC DNL
05747-097
20
–20
–15
–10
–5
0
5
10
15
OUTPUT (µV)
TIME (s)
0 1 2 3 4 5 6 7 8 9 10
Figure 22. 0.1 Hz to 10 Hz DAC Output Noise (Code 800)
5.0
0
0.5
1.0
1.5
2.5
3.5
4.5
2.0
3.0
4.0
–5 –4 –3 –2 –1 0 1 2 3 4 5 6 7 8 9 10
DAC OUTPUT (V)
TIME (µs)
64pF
1nF
10nF
05747-084
Figure 23. Settling Time for a ¼ to ¾ Output Voltage Step