Datasheet

Data Sheet ADuC845/ADuC847/ADuC848
Rev. C | Page 37 of 108
TYPICAL PERFORMANCE CHARACTERISTICS
–120
–110
–100
–80
–70
–50
–40
–20
–10
–90
–30
–60
0
0 10 20 30 40 50 9080 1007060 110
FREQUENCY (Hz)
GAIN (dB)
04741-018
Figure 18. Filter Response, Chop On, SF = 69 Decimal
–150
–130
–110
–90
–50
–30
–10
–70
0 10 20 30 40 50 9080 1007060
FREQUENCY (Hz)
AMPLITUDE (dB)
04741-019
Figure 19. Filter Response, Chop On, SF = 255 Decimal
–120
–110
–100
–80
–70
–50
–40
–20
–10
–90
–30
–60
0
10 30 50 70 90 110 210190170 230150130 250
SF (Decimal)
GAIN (dB)
04741-020
Figure 20. 50 Hz Normal Mode Rejection vs. SF Word, Chop On
–120
–110
–100
–80
–70
–50
–40
–20
–10
–90
–30
–60
0
10 30 50 70 90 110 210190170 230150130 250
SF (Decimal)
GAIN (dB)
04741-021
Figure 21. 60 Hz Normal Mode Rejection vs. SF, Chop On
–150
–130
–110
–90
–50
–30
–10
–70
10
170.1 160.1 150.1 140.1 130.1 120.1 110.1 100.1
90.1 80.1 70.1 60.1 50.1 40.1 30.1 20.1 10.1
0.1
FREQUENCY (Hz)
AMPLITUDE (dB)
04741-022
Figure 22. Chop Off, Fadc = 50 Hz, SF = 52H
–150
–130
–110
–50
–10
–30
–70
–190
10
170.1 160.1 150.1 140.1 130.1 120.1 110.1 100.1
90.1 80.1 70.1 60.1 50.1 40.1 30.1 20.1 10.1
0.1
FREQUENCY (Hz)
AMPLITUDE (dB)
04741-023
Figure 23. Chop Off, SF = 52H, REJ60 Enabled