Datasheet

AD7156
Rev. 0 | Page 10 of
–4
–5
–50 –25 500 25 75 100
07726-016
5
4
2
0
–2
3
1
–1
–3
OFFSET ERROR (fF)
20
10
–10
0
–20
010 205152530
DNL (fF)
CAPDAC CODE
07726-019
1.8V
3.3V
TEMPERATURE (°C)
Figure 16. Capacitance Input Offset Error vs. Temperature,
V
DD
= 1.8 V and 3.3 V, CIN and EXC Pins Open Circuit
Figure 19. CAPDAC Differential Nonlinearity (DNL), V
DD
= 1.8 V
0.35
0.25
0.05
–0.15
0.15
–0.05
–0.25
GAIN ERROR (%FSR)
7
80
70
50
60
40
–50 0 50–25 25 75
I
DD
MAX (µA)
TEMPERATURE (°C)
07726-020
28
–0.35
–50 0 50 100
07726-01
1.8V
3.6V
2V
2.7V
4.0
3.0
1.0
0.5
2.0
3.5
1.5
2.5
0
I
DD
MAX (µA)
07726-021
TEMPERATURE (°C)
Figure 17. Capacitance Input Gain Error vs. Temperature,
V
DD
= 2.7 V, CIN to EXC = 4 pF
Figure 20. Current vs. Temperature,
V
DD
= 1.8 V, 2 V, 2.7 V, and 3.6 V
16.50
16.25
15.75
15.25
16.00
15.50
15.00
FREQUENCY (kHz)
8
14.75
14.50
–50 0 50–25 25 75 100
TEMPERATURE (°C)
07726-01
1.8V
3.6V
2V
2.7V
1.8V
3.6V
2.7V
2V
–50 0 50–25 25 75
TEMPERATURE (°C)
Figure 18. EXC Frequency Error vs. Temperature,
V
DD
= 1.8 V, 2 V, 2.7 V, and 3.6 V
Figure 21. Power-Down Current vs. Temperature,
V
DD
= 1.8 V, 2 V, 2.7 V, and 3.6 V