AD9260ASZ datasheet(7/45 Pages) AD

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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

MHz min

0.605 × (fCLOCK/20 MHz)

MHz max

Stop-Band

1.870 × (fCLOCK/20 MHz)

MHz min

18.130 × (fCLOCK/20 MHz)

MHz max

Pass-Band/Transition Band Frequency

(–0.1 dB Point)

0.807 × (fCLOCK/20 MHz)

MHz max

(–3.0 dB Point)

1.136 × (fCLOCK/20 MHz)

MHz max

Absolute Group Delay1

13.55 × (20 MHz/fCLOCK)

µs max

Group Delay Variation

µs max

Settling Time (to ± 0.0007%)1

24.2 × (20 MHz/fCLOCK)

µs max

4× DECIMATION (N = 4)

Pass-Band Ripple

0.001

dB max

Stop-Band Attenuation

82.5

dB min

Pass-Band

MHz min

1.24 × (fCLOCK/20 MHz)

MHz max

Stop-Band

3.75 × (fCLOCK/20 MHz)

MHz min

16.25 × (fCLOCK/20 MHz)

MHz max

Pass-Band/Transition Band Frequency

(–0.1 dB Point)

1.61 × (fCLOCK/20 MHz)

MHz max

(–3.0 dB Point)

2.272 × (fCLOCK/20 MHz)

MHz max

Absolute Group Delay1

2.90 × (20 MHz/fCLOCK)

µs max

Group Delay Variation

µs max

Settling Time (to ± 0.0007%)1

5.05 × (20 MHz/fCLOCK)

µs max

2× DECIMATION (N = 2)

Pass-Band Ripple

0.0005

dB max

Stop-Band Attenuation

85.5

dB min

Pass-Band

MHz min

2.491 × (fCLOCK/20 MHz)

MHz max

Stop-Band

7.519 × (fCLOCK/20 MHz)

MHz min

12.481 × (fCLOCK/20 MHz)

MHz max

Pass-Band/Transition Band Frequency

(–0.1 dB Point)

3.231 × (fCLOCK/20 MHz)

MHz max

(–3.0 dB Point)

4.535 × (fCLOCK/20 MHz)

MHz max

Absolute Group Delay1

0.80 × (20 MHz/fCLOCK)

µs max

Group Delay Variation

µs max

Settling Time (to ± 0.0007%)1

1.40 × (20 MHz/fCLOCK)

µs max

1× DECIMATION (N = 1)

Propagation Delay: tPROP

ns max

Absolute Group Delay

(225 × (20 MHz/fCLOCK)) + tPROP

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.

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