Datasheet

AD7151
Rev. 0 | Page 8 of 28
8642
OFFSET ERROR (fF)
RESISTANCE EXC TO GND (MΩ)
10
–10
–5
0
5
01
0
10
–10
–5
0
5
1100010010
GAIN ERROR (%FS)
PARALLEL RESISTANCE (MΩ)
07086-110
8642
GAIN ERROR (%FS)
RESISTANCE EXC TO GND (MΩ)
Figure 10. Capacitance Input Offset Error vs. Resistance EXC to GND,
V
DD
= 3.3 V, CIN Pin Open Circuit
0.50
–0.50
–0.25
0
0.25
01
0
07086-113
4
–4
–2
0
2
–50 1007550250–25
OFFSET ERROR (fF)
TEMPERATURE (°C)
07086-111
20015010050
GAIN ERROR (%FS)
SERIAL RESISTANCE (kΩ)
Figure 11. Capacitance Input Gain Error vs. Resistance EXC to GND,
V
DD
= 3.3 V, CIN to EXC = 2 pF
2
–2
–1
0
1
02
50
07086-112
Figure 12. Capacitance Input Gain Error vs. Serial Resistance
V
DD
= 3.3 V, CIN to EXC = 2 pF
Figure 13. Capacitance Input Gain Error vs. Parallel Resistance,
V
DD
= 3.3 V, CIN to EXC = 2 pF
07086-114
0.2
–0.2
–0.2
–0.1
0
0.1
–50 1007550250–25
GAIN ERROR (%FS)
TEMPERATURE (°C)
Figure 14. Capacitance Input Offset Error vs. Temperature,
V
DD
= 3.3 V, CIN and EXC Pins Open Circuit
07086-115
Figure 15. Capacitance Input Gain Error vs. Temperature,
V
DD
= 3.3 V, CIN to EXC = 2 pF