AD7873 Data Sheet
Rev. F | Page 10 of 28
Figure 11. Reference Current vs. Sample Rate
Figure 12. Switch On Resistance vs. +V
CC
(X+, Y+: +V
CC
to Pin; X−, Y−: Pin to GND)
Figure 13. Linearity Error vs. Sampling Rate for Various R
IN
Figure 14. Reference Current vs. Temperature
Figure 15. Switch On Resistance vs. Temperature
(X+, Y+: +VCC to Pin; X−, Y−: Pin to GND)
Figure 16. Internal V
REF
vs. Temperature
0.5
1.5
2.5
3.5
4.5
5.5
6.5
7.5
REFERENCE CURRENT (µA)
705525 4010 85 100 115 130
SAMPLE RATE (kHz)
02164-011
Y+
X+
X–
Y–
4
5
6
7
8
9
10
R
ON
(Ω)
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
+V
CC
(V)
02164-012
0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
ERROR (LSB)
15 35 55 75 95 115 135 155 175 195
SAMPLING RATE (kSPS)
INL: R = 2kΩ
INL: R = 500Ω
DNL: R = 2kΩ
DNL: R = 500Ω
02164-013
2
4
6
5
3
8
7
REFERENCE CURRENT (µA)
10
9
12
11
14
13
020–40 –20 40 60 80
TEMPERATURE (°C)
2164-014
Y+
X+
X–
Y–
3
4
5
6
7
8
9
R
ON
(Ω)
–40 –20 0 20 40 60 80 100
TEMPERATURE (°C)
02164-015
2.4988
2.4990
2.4992
2.4994
2.4996
2.4998
2.5000
2.5002
2.5004
2.5006
INTERNAL
REF
(V)
TEMPERATURE (°C)
–40 –30 –20 –10 0 10 20 30 40 50 60 70 80
02164-016
