CED1Z AD [Analog Devices], CED1Z Datasheet - Page 31

• Manufacturer Part Number: CED1Z
• Description: 8-/6-/4-Channel DAS with 16-Bit,Bipolar Input,Simultaneous Sampling ADC
• Manufacturer: AD [Analog Devices]

When the oversampling mode is selected for the AD7606/
AD7606-6/AD7606-4, it has the effect of adding a digital filter
function after the ADC. The different oversampling rates and
the CONVST sampling frequency produce different digital filter
frequency profiles.
Figure 56 to Figure 60 show the digital filter frequency profiles for
the different oversampling rates. The combination of the analog
antialiasing filter and the oversampling digital filter can be used
to eliminate and reduce the complexity of the design of any filter
before the AD7606/AD7606-6/AD7606-4. The digital filtering
combines steep roll-off and linear phase response.
–100
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–90
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0
0
0
100
100
100
Figure 56. Digital Filter Response for OS 2
Figure 57. Digital Filter Response for OS 4
Figure 58. Digital Filter Response for OS 8
1k
1k
1k
FREQUENCY (Hz)
FREQUENCY (Hz)
FREQUENCY (Hz)
10k
10k
10k
100k
100k
100k
1M
1M
1M
AV
V
T
10V RANGE
OS BY 2
AV
V
T
10V RANGE
OS BY 4
AV
V
T
10V RANGE
OS BY 8
DRIVE
A
DRIVE
A
DRIVE
A
CC
CC
CC
= 25°C
= 25°C
= 25°C
= 5V
= 5V
= 5V
= 5V
= 5V
= 5V
10M
10M
10M
Rev. 0 | Page 31 of 36
–100
–100
–100
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–70
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–90
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–40
–50
–60
–70
–80
–90
–10
–20
–30
–40
–50
–60
–70
–80
–90
0
0
0
100
100
100
Figure 59. Digital Filter Response for OS 16
Figure 60. Digital Filter Response for OS 32
Figure 61. Digital Filter Response for OS 64
AD7606/AD7606-6/AD7606-4
1k
1k
1k
FREQUENCY (Hz)
FREQUENCY (Hz)
FREQUENCY (Hz)
10k
10k
10k
100k
100k
100k
1M
1M
1M
AV
V
T
10V RANGE
OS BY 16
AV
V
T
10V RANGE
OS BY 32
AV
V
T
10V RANGE
OS BY 64
DRIVE
A
DRIVE
A
DRIVE
A
CC
CC
CC
= 25°C
= 25°C
= 25°C
= 5V
= 5V
= 5V
= 5V
= 5V
= 5V
10M
10M
10M