Datasheet

AD9260
Rev. C | Page 6 of 44
DIGITAL FILTER CHARACTERISTICS
Table 4.
Parameter AD9260 Unit
8× DECIMATION (N = 8)
Pass-Band Ripple 0.00125 dB max
Stop-Band Attenuation 82.5 dB min
Pass-Band 0 MHz min
0.605 × (f
CLOCK
/20 MHz) MHz max
Stop-Band 1.870 × (f
CLOCK
/20 MHz) MHz min
18.130 × (f
CLOCK
/20 MHz) MHz max
Pass-Band/Transition Band Frequency
(–0.1 dB Point) 0.807 × (f
CLOCK
/20 MHz) MHz max
(–3.0 dB Point) 1.136 × (f
CLOCK
/20 MHz) MHz max
Absolute Group Delay
1
13.55 × (20 MHz/f
CLOCK
) µs max
Group Delay Variation 0 µs max
Settling Time (to ± 0.0007%)
1
24.2 × (20 MHz/f
CLOCK
) µs max
4× DECIMATION (N = 4)
Pass-Band Ripple 0.001 dB max
Stop-Band Attenuation 82.5 dB min
Pass-Band 0 MHz min
1.24 × (f
CLOCK
/20 MHz) MHz max
Stop-Band 3.75 × (f
CLOCK
/20 MHz) MHz min
16.25 × (f
CLOCK
/20 MHz) MHz max
Pass-Band/Transition Band Frequency
(–0.1 dB Point) 1.61 × (f
CLOCK
/20 MHz) MHz max
(–3.0 dB Point) 2.272 × (f
CLOCK
/20 MHz) MHz max
Absolute Group Delay
1
2.90 × (20 MHz/f
CLOCK
) µs max
Group Delay Variation 0 µs max
Settling Time (to ± 0.0007%)
1
5.05 × (20 MHz/f
CLOCK
) µs max
2× DECIMATION (N = 2)
Pass-Band Ripple 0.0005 dB max
Stop-Band Attenuation 85.5 dB min
Pass-Band 0 MHz min
2.491 × (f
CLOCK
/20 MHz) MHz max
Stop-Band 7.519 × (f
CLOCK
/20 MHz) MHz min
12.481 × (f
CLOCK
/20 MHz) MHz max
Pass-Band/Transition Band Frequency
(–0.1 dB Point) 3.231 × (f
CLOCK
/20 MHz) MHz max
(–3.0 dB Point) 4.535 × (f
CLOCK
/20 MHz) MHz max
Absolute Group Delay
1
0.80 × (20 MHz/f
CLOCK
) µs max
Group Delay Variation 0 µs max
Settling Time (to ± 0.0007%)
1
1.40 × (20 MHz/f
CLOCK
) µs max
1× DECIMATION (N = 1)
Propagation Delay: t
PROP
13 ns max
Absolute Group Delay (225 × (20 MHz/f
CLOCK
)) + t
PROP
ns max
1
To determine overall Absolute Group Delay and/or Settling Time inclusive of delay from the sigma-delta modulator, add Absolute Group Delay and/or Settling Time
pertaining to specific decimation mode to the Absolute Group Delay specified in 1 ×decimation.