KAT1108E datasheet(10/17 Pages) IDT

Il numero della parte	KAT1108E

Spiegazioni elettronici	6-bit Digital Step Attenuator

Download	17 Pages

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Produttore elettronici	IDT [Integrated Device Technology]

Homepage	http://www.idt.com

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10 / 17 page

6-bit Digital Step Attenuator

400 to 4000 MHz IDTF1953

Glitch-Free

TM Digital Step Attenuator

10

Rev2 April2014

F1953

DATASHEET

TOCS CONTINUED (-5-) [fRF = 900 MHz]

Transient [ 15.5 to 16.0 (MSB+) 3.3V F1953 ]

The graphs

ABOVE show the transient overshoot and

settling time performance for both the MSB+ and

MSB- cases for the F1953. The device settles very

quickly (~400) nsec with benign (~0.5) dB overshoot.

Transient [ 15.75 to 16.00 (MSB+) Standard DSA ]

Transient [ 16.0 to 15.5 (MSB-) 5.0V F1953 ]

The graphs

BELOW show the transient overshoot and

settling time performance for a popular competing

DSA.

N

Noottee tthhee oovveerrsshhoooott//uunnddeerrsshhoooott eexxccuurrssiioonn ooff

aallm

moosstt 1100 ddBB and the very long settling time. For the

MSB- case, the settling time is off the scale, ~ 3 usec.

Transient [ 16.00 to 15.75 (MSB-) Standard DSA ]

-1.0

-0.5

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

-10.9

-9.9

-8.9

-7.9

-6.9

-5.9

-4.9

-3.9

-2.9

-1.9

-0.9

0

100

200

300

400

500

600

700

800

Time (nsec)

Glitch ~ 0.5 dB

Pwr (dBm)

Trigger

Settling Time = 400 nsec (+/- 0.1 dB)

-1.0

-0.5

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

-15.20

-14.20

-13.20

-12.20

-11.20

-10.20

-9.20

-8.20

-7.20

-6.20

-5.20

-100

0

100

200

300

400

500

600

700

Time (nsec)

Pwr (dBm)

Trigger

Settling Time = 600nsec (+/- 0.1 dB)

-1.0

-0.5

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

-11.0

-10.0

-9.0

-8.0

-7.0

-6.0

-5.0

-4.0

-3.0

-2.0

-1.0

0

100

200

300

400

500

600

700

800

Time (nsec)

Glitch ~ 0.3 dB

Pwr (dBm)

Trigger

Settling Time = 370 nsec (+/- 0.1 dB)

-1.0

-0.5

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

-13.57

-12.57

-11.57

-10.57

-9.57

-8.57

-7.57

-6.57

-5.57

-4.57

-3.57

-100

0

100

200

300

400

500

600

700

Time (nsec)

Pwr (dBm)

Trigger

Settling Time >> 1 usec

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