AD9260AS datasheet(5/36 Pages) AD

5 / 36 page

–5–

REV. B

AD9260

DIGITAL FILTER CHARACTERISTICS

Parameter

AD9260

Units

× DECIMATION (N = 8)

Passband Ripple

0.00125

dB max

Stopband Attenuation

82.5

dB min

Passband

MHz min

0.605

× (f

CLOCK/20 MHz)

MHz max

Stopband

1.870

× (fCLOCK/20 MHz)

MHz min

18.130

× (fCLOCK/20 MHz)

MHz max

Passband/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/f

CLOCK)

µs max

Group Delay Variation

µs max

Settling Time (to

±0.0007%)1

24.2

× (20 MHz/fCLOCK)

µs max

× DECIMATION (N = 4)

Passband Ripple

0.001

dB max

Stopband Attenuation

82.5

dB min

Passband

MHz min

1.24

× (fCLOCK/20 MHz)

MHz max

Stopband

3.75

× (f

CLOCK/20 MHz)

MHz min

16.25

× (fCLOCK/20 MHz)

MHz max

Passband/Transition Band Frequency

(–0.1 dB Point)

1.61

× (f

CLOCK/20 MHz)

MHz max

(–3.0 dB Point)

2.272

× (fCLOCK/20 MHz)

MHz max

Absolute Group Delay

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

× DECIMATION (N = 2)

Passband Ripple

0.0005

dB max

Stopband Attenuation

85.5

dB min

Passband

MHz min

2.491

× (fCLOCK/20 MHz)

MHz max

Stopband

7.519

× (fCLOCK/20 MHz)

MHz min

12.481

× (f

CLOCK/20 MHz)

MHz max

Passband/Transition Band Frequency

(–0.1 dB Point)

3.231

× (fCLOCK/20 MHz)

MHz max

(–3.0 dB Point)

4.535

× (f

CLOCK/20 MHz)

MHz max

Absolute Group Delay

0.80

× (20 MHz/fCLOCK)

µs max

Group Delay Variation

µs max

Settling Time (to

±0.0007%)1

1.40

× (20 MHz/f

CLOCK)

µs max

× DECIMATION (N = 1)

Propagation Delay: tPROP

ns max

Absolute Group Delay

(225

× (20 MHz/fCLOCK)) + tPROP

ns max

NOTES

1To 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.

Specifications subject to change without notice.

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