Datasheet

AD7798/AD7799 Data Sheet
Rev. B | Page 12 of 28
TYPICAL PERFORMANCE CHARACTERISTICS
8388640
8388630
8388620
8388610
8388600
8388590
8388580
0 200 400 600 800
999
04856-006
SAMPLES
CODE
Figure 6. AD7799 Noise (V
REF
= AV
DD
/2, Gain = 64, Update Rate = 4.17 Hz)
50
40
30
20
10
0
8388581
8388590 8388600 8388610 8388620
8388630
8388635
04856-007
CODE
OCCURRENCE
Figure 7. AD7799 Noise Distribution Histogram (V
REF
= AV
DD
/2,
Gain = 64, Update Rate = 4.17 Hz)
8388680
8388660
8388640
8388620
8388600
8388580
8388560
8388540
0 200
400 600 800 999
04856-008
SAMPLES
CODE
Figure 8. AD7799 Noise (V
REF
= AV
DD
/2, Gain = 64, Update Rate = 16.7 Hz)
30
25
20
15
10
5
0
8388549 8388560 8388580 8388600 8388620 8388640
8388669
04856-009
CODE
OCCURRENCE
Figure 9. AD7799 Noise Distribution Histogram (V
REF
= AV
DD
/2,
Gain = 64, Update Rate = 16.7 Hz)
3.0
2.5
2.0
1.5
1.0
0.5
0
0
0.5 1.0 1.5
2.0 2.5
3.0
3.5 4.0
4.5 5.0
04856-010
REFERENCE VOLTAGE (V)
RMS NOISE (
µV)
V
DD
= 5V
UPDATE RATE = 16.6Hz
T
A
= 25°C
Figure 10. RMS Noise vs. Reference Voltage (Gain = 1)