Datasheet

Data Sheet AD7607
Rev. B | Page 27 of 32
Figure 44 to Figure 49 show the digital filter frequency profiles for
the different oversampling ratios. The combination of the analog
antialiasing filter and the oversampling digital filter helps to reduce
the complexity of the design of the filter before the AD7607. The
digital filtering combines steep roll-off and linear phase response.
–90
–80
–70
–60
–50
–40
–30
–20
–10
0
100 1k 10k 100k 1M 10M
ATTENUATION (dB)
FREQUENCY (Hz)
AV
CC
= V
DRIVE
= 5V
T
A
= 25°C
±10V RANGE
OS BY 2
08096-011
Figure 44. Digital Filter Response for Oversampling by 2
–90
–80
–70
–60
–50
–40
–30
–20
–10
0
100 1k 10k 100k 1M 10M
ATTENUATION (dB)
FREQUENCY (Hz)
AV
CC
= V
DRIVE
= 5V
T
A
= 25°C
±10V RANGE
OS BY 4
08096-012
Figure 45. Digital Filter Response for Oversampling by 4
–90
–80
–70
–60
–50
–40
–30
–20
–10
0
100 1k 10k 100k 1M 10M
ATTENUATION (dB)
FREQUENCY (Hz)
AV
CC
= V
DRIVE
= 5V
T
A
= 25°C
±10V RANGE
OS BY 8
08096-013
Figure 46. Digital Filter Response for Oversampling by 8
–90
–80
–70
–60
–50
–40
–30
–20
–10
0
100 1k 10k 100k 1M 10M
ATTENUATION (dB)
FREQUENCY (Hz)
AV
CC
= V
DRIVE
= 5V
T
A
= 25°C
±10V RANGE
OS BY 16
08096-014
Figure 47. Digital Filter Response for Oversampling by 16
–90
–80
–70
–60
–50
–40
–30
–20
–10
0
100 1k 10k 100k 1M 10M
ATTENUATION (dB)
FREQUENCY (Hz)
AV
CC
= V
DRIVE
= 5V
T
A
= 25°C
±10V RANGE
OS BY 32
08096-015
Figure 48. Digital Filter Response for Oversampling by 32
–90
–80
–70
–60
–50
–40
–30
–20
–10
0
100 1k 10k 100k 1M 10M
ATTENUATION (dB)
FREQUENCY (Hz)
AV
CC
= V
DRIVE
= 5V
T
A
= 25°C
±10V RANGE
OS BY 64
08096-016
Figure 49. Digital Filter Response for Oversampling by 64