Datasheet

AD7792/AD7793
Rev. B | Page 13 of 32
TYPICAL PERFORMANCE CHARACTERISTICS
8388800
8388450
8388500
8388550
8388600
8388650
8388700
8388750
0 1000800600400200
04855-006
READING NUMBER
CODE READ
Figure 6. Typical Noise Plot (Internal Reference, Gain = 64,
Update Rate = 16.7 Hz) for AD7793
16
0
2
4
6
8
10
12
14
8388482 8388750838872083886808388640838860083885608388520
04855-007
OCCURRENCE
CODE
Figure 7. Noise Distribution Histogram for AD7793
(Internal Reference, Gain = 64, Update Rate = 16.7 Hz)
20
10
0
–2.0 –1.2 –0.8 –0.4 0 0.4 0.8 1.2 1.6 2.0
04855-008
MATCHING (%)
OCCURRENCE (%)
Figure 8. Excitation Current Matching (210 μA) at Ambient
Temperature
20
10
0
–1.75 –1.05 –0.70 –0.35 0 0.35 0.70 1.05 1.40 1.75
04855-009
MATCHING (%)
OCCURRENCE (%)
Figure 9. Excitation Current Matching (1 mA) at Ambient Temperature
90
80
70
60
50
40
30
20
10
0
0 200 400 600 800 1000
04855-010
LOAD CAPACITANCE (nF)
POWER-UP TIME (ms)
Figure 10. Bias Voltage Generator Power-Up Time vs. Load Capacitance
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
04855-011
REFERENCE VOLTAGE (V)
RMS NOISE (µV)
V
DD
= 5V
UPDATE RATE = 16.6Hz
T
A
= 25°C
Figure 11. RMS Noise vs. Reference Voltage (Gain = 1)