Datasheet

AD7843
Rev. B | Page 9 of 20
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)
02144-B-010
Figure 10. Reference Current vs. Sample Rate
Y+
X+
X–
Y–
4
5
6
7
8
9
10
R
ON
(Ω)
02144-B-011
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
+V
CC
(V)
Figure 11. Switch-On Resistance vs. +V
CC
(X+, Y+: +V
CC
to Pin; X−, Y−: Pin to GND)
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)
02144-B-012
INL: R = 2k Ω
INL: R = 500 Ω
DNL: R = 2k Ω
DNL: R = 500 Ω
Figure 12. Maximum Sampling Rate vs. R
IN
2
4
6
5
3
8
7
REFERENCE CURRENT (µA)
10
9
12
11
14
13
020–40 –20 40 60 80
TEMPERATURE (°C)
02144-B-013
Figure 13. Reference Current vs. Temperature
Y+
X+
X–
Y–
3
4
5
6
7
8
9
R
ON
(Ω)
02144-B-014
–40 –20 0 20 40 60 80 100
TEMPERATURE (°C)
Figure 14. Switch-On Resistance vs. Temperature
(X+, Y+:+V
CC
to Pin; X−, Y−: Pin to GND)
120
100
80
60
40
20
0
SNR (dB)
30.022.57.5 15.00 37.5 45.0 52.5 60.0
FREQUENCY (kHz)
02144-B-015
f
SAMPLE
= 125kHz
f
IN
= 15kHz
SNR = 68.34dB
Figure 15. Auxiliary Channel Dynamic Performance
(f
SAMPLE
=125 kHz, f
INPUT
= 15 kHz)