Datasheet

AD7747
Rev. 0 | Page 10 of 28
200
–200
064
05469-050
CAPDAC CODE
CAPDAC DNL (fF)
150
100
50
0
–50
–100
–150
8 162432404856
Figure 16. CAPDAC Differential Nonlinearity (DNL)
2.0
–2.0
–50
150
05469-034
TEMPERATURE (°C)
ERROR (°C)
1.5
1.0
0.5
0
–0.5
–1.0
–1.5
–25 0 25 50 75 100 125
Figure 17. Internal Temperature Sensor Error vs. Temperature
1.0
–3.0
–50
150
05469-035
TEMPERATURE (°C)
ERROR (°C)
0.5
0
–0.5
–1.0
–1.5
–2.0
–2.5
–25 0 25 50 75 100 125
Figure 18. External Temperature Sensor Error vs. Temperature
0
–120
01k
05469-051
INPUT SIGNAL FREQUENCY (Hz)
GAIN (dB)
–20
–40
–60
–80
–100
100 200 300 400 500 600 700 800 900
Figure 19. Capacitive Channel Frequency Response;
Conversion Time = 22 ms
0
–120
0 200
05469-052
INPUT SIGNAL FREQUENCY (Hz)
GAIN (dB)
–20
–40
–60
–80
–100
25 50 75 100 125 150 175
Figure 20. Capacitive Channel Frequency Response;
Conversion Time = 124 ms
0
–120
0
400
05469-039
INPUT SIGNAL FREQUENCY (Hz)
GAIN (dB)
–20
–40
–60
–80
–100
50 100 150 200 250 300 350
Figure 21. Voltage Channel Frequency Response;
Conversion Time = 122.1 ms