Datasheet

AD7150
Rev. 0 | Page 8 of 28
500
–500
–250
0
250
11
00010010
OFFSET ERROR (fF)
RESISTANCE CIN TO GND (MΩ)
06517-010
Figure 10. Capacitance Input Offset Error vs. Resistance CIN to GND,
V
DD
= 3.3 V, EXC Pin Open Circuit
10
–10
–5
0
5
11
00010010
GAIN ERROR (%FS)
RESISTANCE CIN TO GND (MΩ)
06517-011
8642
OFFSET ERROR (fF)
RESISTANCE EXC TO GND (MΩ)
Figure 11. Capacitance Input Gain Error vs. Resistance CIN to GND,
V
DD
= 3.3 V, CIN to EXC = 2 pF
10
–10
–5
0
5
01
0
06517-012
0.50
–0.50
–0.25
0
0.25
0108642
GAIN ERROR (%FS)
RESISTANCE EXC TO GND (MΩ)
06517-013
2
–8
–6
–4
–2
0
025020015010050
GAIN ERROR (%FS)
SERIAL RESISTANCE (kΩ)
Figure 12. Capacitance Input Offset Error vs. Resistance EXC to GND,
V
DD
= 3.3 V, CIN Pin Open Circuit
Figure 13. Capacitance Input Gain Error vs. Resistance EXC to GND,
V
DD
= 3.3 V, CIN to EXC = 2 pF
06517-014
Figure 14. Capacitance Input Gain Error vs. Serial Resistance,
V
DD
= 3.3 V, CIN to EXC = 2 pF
10
–10
–5
0
5
1100010010
GAIN ERROR (%FS)
PARALLEL RESISTANCE (MΩ)
06517-015
Figure 15. Capacitance Input Gain Error vs. Parallel Resistance,
V
DD
= 3.3 V, CIN to EXC = 2 pF