AD7747
200
150
100
50
0
–50
–100
–150
–200
0
8
16
24
32
40
48
56
64
CAPDAC CODE
Figure 16. CAPDAC Differential Nonlinearity (DNL)
2.0
1.5
1.0
0.5
0
–0.5
–1.0
–1.5
–2.0
–50 –25
0
25
50
75 100 125 150
TEMPERATURE (°C)
Figure 17. Internal Temperature Sensor Error vs. Temperature
1.0
0.5
0
–0.5
–1.0
–1.5
–2.0
–2.5
–3.0
–50 –25
0
25
50
75 100 125 150
TEMPERATURE (°C)
Figure 18. External Temperature Sensor Error vs. Temperature
0
–20
–40
–60
–80
–100
–120
0
100 200 300 400 500 600 700 800 900 1k
INPUT SIGNAL FREQUENCY (Hz)
Figure 19. Capacitive Channel Frequency Response;
Conversion Time = 22 ms
0
–20
–40
–60
–80
–100
–120
0
25
50
75 100 125 150 175 200
INPUT SIGNAL FREQUENCY (Hz)
Figure 20. Capacitive Channel Frequency Response;
Conversion Time = 124 ms
0
–20
–40
–60
–80
–100
–120
0
50 100 150 200 250 300 350 400
INPUT SIGNAL FREQUENCY (Hz)
Figure 21. Voltage Channel Frequency Response;
Conversion Time = 122.1 ms
Rev. 0 | Page 10 of 28