Datasheet

AD7794/AD7795
Rev. D | Page 16 of 36
TYPICAL PERFORMANCE CHARACTERISTICS
8388800
8388450
8388500
8388550
8388600
8388650
8388700
8388750
0 1000800600400200
04854-006
READING NUMBER
CODE READ
Figure 6. Typical Noise Plot for the AD7794 (Internal Reference,
Gain = 64, Update Rate = 16.7 Hz, Chop Enabled)
16
0
2
4
6
8
10
12
14
8388482 8388750838872083886808388640838860083885608388520
04854-007
OCCURRENCE
CODE
Figure 7. Noise Distribution Histogram for the AD7794 (Internal Reference,
Gain = 64, Update Rate = 16.7 Hz, Chop Enabled)
8388450
8388050
8388100
8388150
8388200
8388250
8388300
8388350
8388400
0 1000800600400200
04854-008
READING NUMBER
CODE READ
Figure 8. Typical Noise Plot for the AD7794 (Internal Reference,
Gain = 64, Update Rate = 16.7 Hz, AMP-CM = 1, Chop Disabled)
14
0
2
4
6
8
10
12
8388068 8388396838835083883008388250838820083881508388100
04854-009
OCCURRENCE
CODE
Figure 9. Noise Distribution Histogram for the AD7794 (Internal Reference,
Gain = 64, Update Rate = 16.7 Hz, Chop Disabled, AMP-CM = 1)
20
10
0
–2.0 –1.2 –0.8 –0.4 0 0.4 0.8 1.2 1.6 2.0
04854-010
MATCHING (%)
(%)
Figure 10. Excitation Current Matching (210 μA) at Ambient Temperature
90
80
70
60
50
40
30
20
10
0
0 200 400 600 800 1000
04854-011
LOAD CAPACITANCE (nF)
POWER-UP TIME (ms)
BOOST = 0
BOOST = 1
Figure 11. Bias Voltage Generator Power-Up Time vs. Load Capacitance